Upwork home
Sign up
Secondary

Hire the best Blockchain developers

Check out Blockchain developers with the skills you need for your next job.
Hire freelancers
Clients rate Blockchain developers
Rating is 4.7 out of 5.
4.7/5
based on 3,380 client reviews
  2. Development & IT Talent
  3. Emerging Tech Freelancers
  4. (Current) Blockchain Developers
  • $150 hourly

    • 5.0/5
    • (264 jobs)
    I am a cybersecurity professional with a Master's Degree in Cyber Operations and two years of work experience in cybersecurity research and development at a world-class R&D laboratory. In that job, I gained experience in network traffic analysis, malware analysis, and cryptography. For over two years, I have worked as a freelancer, providing consulting, content development, and course creation in cybersecurity and blockchain security. I specialize in development of technical content (blogs, whitepapers, case studies, and courseware) in the field of cybersecurity. I currently hold the Certified Ethical Hacker and Certified Blockchain Security Professional certifications.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Reverse Engineering
    Cryptocurrency
    Cryptography
    Information Security
  • $35 hourly

    • 5.0/5
    • (18 jobs)
    Hi there! If you are visiting my page, then you are definitely in the right place for a high-paced software developer, and tech lead to deliver your project. I am an experienced Solidity, Web3, and Python Developer with an overall experience of 3+ years. I specialize in writing smart contracts, Python Scripting, and Full-Stack Development. To date, I have delivered over multiple large-scale projects to my clients in and outside of Upwork. Some of the blockchain projects I have worked on have made over $300K+ in total revenue during launch. You can check my portfolio here: manishgotame.com.np In the field of Blockchain, I have experience in: - Chains: Ethereum, Binance Smart chain, Solana, Polygon, etc. - Writing gas-efficient smart contracts in Solidity. - ERC721 / ERC20 / ERC1155 token standard contract. - NFTs, Staking, DAO, AMM, etc. - Proper Contract testing using Hardhat. - Web3 Integration with 15+ wallet connections in React.js, functional on both mobile and web. Python / Django: - Full-stack development using Django in the backend, React in the frontend. - Have worked on multiple large-scale web applications in the field of data extraction, and scraping. - I have built custom OCR libraries and data extraction tools. - AI models using Keras, and Pytorch integration within your web application. My strong sides are responsibility, attention to clients' needs, and a strong will to achieve the final results of team efforts. It's enough comfortable for me to work both in a team and in stand-alone development. Send me a message and let's start hammering out the details of your project.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Solidity
    PDF Conversion
    Django
    Scripting
    web3.js
    Smart Contract
    React
    HTML5
    Ethereum
    CSS
    jQuery
    JavaScript
    Python
    Data Extraction
  • $130 hourly

    • 5.0/5
    • (11 jobs)
    Extensive expertise, and experience in taking idea to a deliverable product / MVP. Primarily from my experience being the technical lead at a small size venture funded start up I've had the chance to First, explore a wide variety of languages, frameworks, and technologies allowing me to have a full conceptual overview of the tools at my disposal, and their respective benefits + pitfalls, and second have the experience working with, and managing a small distributed team closely with the CEO.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Solidity
    Smart Contract
    Web Scraping
    Node.js
    React
    Golang
    Vue.js
    GPT-3
    Rust
    Next.js
    GPT-4
    ChatGPT
    Web Development
    CSS
  • $90 hourly

    • 5.0/5
    • (49 jobs)
    I'm a full-stack developer with 20 years of professional experience delivering solutions to a wide range of customers, from single founder startups to large corporations. I see myself as a force multiplier - in addition to my technical skills, I have been successfully managing development teams implementing complex solutions while acting as a hands-on team lead. My experience and the wide range of technical and management skills allows to implement almost any kind of project from scratch or breathe a new life into an existing or struggling project. I have great oral and written English communication skills and I have been a bridge of communication between development teams and non-technical owners in different projects. Some of my recent projects: ⭐ Architecting and leading the implementation of a unique blockchain powered gaming site Role: blockchain and frontend architect, backend developer, team lead of several frontend developers and QAs ⭐ Implementing a learning/training management system with a heavy focus on creating a low-code builder which allows creating interactive parts of the application via GUI Role: I architected the solution, implemented the backend part of it and was overseeing a fairly large team of frontend developers ⭐ Cross-platform mobile applications which act as market trading simulators and provide authentic financial market trading experience through real time data and interactive charts. The applications have top ratings in both Android and Apple stores in a very competitive space and have seen several million installs over the last few years with hundreds to thousands of online users at any given time Role: architecture and full implementation of frontend and backend ⭐ Implemented and provided ongoing development support for one of the leading student portals with several hundreds of thousands of active registered users Role: architected and implemented the original solution and transformational upgrades over the years I have also been at the entrepreneur/owner side of the fence for several years. I have architected, developed and marketed multiple commercial web software products, websites and mobile applications of my own and worked on hundreds of customization projects for these products. Capable of leading development teams and architecting complex systems and subsystems. Thorough understanding of e-commerce. Some of my technical skills are listed below Blockchain development: * Solidity (Ethereum / Binance / Polygon), frontend integration with wallets, i.e, Metamask * Solana (Rust, Anchor, Web3 API, SPL), frontend and mobile integration, i.e, with Phantom * Icon (Python, Java based smart contracts) * Smart contract implementation and architecture planning * Token and NFT implementation (ERC-20, ERC-777, ERC-1155, SPL on Solana) * Automated contract testing * Blockchain node maintenance Backend development: * Node.js * PHP with Phalcon and other MVC frameworks (Laravel, Symfony) * MySQL/MariaDB, InfluxDB, TimescaleDB, PostgreSQL, MongoDB, Redis * Python (Django, smart contracts) * Firebase (Real time database, Firestore, functions, optimization) * Test driven development (unit testing via PHPUnit, Mocha, AVA) * Message queues (RabbitMQ, ZeroMQ, Bull) * Google Cloud, AWS * Grafana * Task runners (Webpack, Gulp, Grunt, Bower) * Architecture visualization and planning via UML, ER diagrams Frontend development: * Angular, RxJs (also AngularJS for legacy projects) * Vue.js, nuxt.js * Javascript / Typescript (ES6, npm, Underscore/Lodash, CanvasJS, jQuery) * Tailwind, Bootstrap * Flow * CSS 3, SASS, LESS * HTML5 * Figma, Photoshop, GIMP, Avocode Team management: * Task planning and specification * Ongoing communication with developers to catch any potential issues early and help the team move forward as quickly as possible * PR reviews * Mentoring * New developer vetting / sourcing * JIRA / Trello / Slack Cross platform mobile application development: * Ionic/Cordova (Android/iOS/web) DevOps: * Linux server administration and performance tuning (Ubuntu, CentOS, RedHat, FreeBSD) * AWS, Google Cloud * Docker, Kubernetes * Apache, nginx configuration and optimization * Mail, DNS server configuration * Prometheus APIs: * API and microservice driven architecture * Amazon Seller Central, Amazon MWS * PaypaI, Stripe and many other payment processors * Shipping APIs * Instagram * OAuth (Facebook, Google, etc.) * Twilio Source code management * Git (and legacy systems like Mercurial and SVN) * Branching / CI/CD strategy * PR / code reviews * Github, Bitbucket, Gitlab Scraping: * Web scraping * Mobile app scraping * Mitmproxy, Charles Proxy * CSS4 queries Specialties: * Low-code systems * Cross-platform mobile applications * Single page applications * Web scraping, mobile app scraping * Forex, stock, commodity, cryptocurrency and other financial markets * E-commerce applications * Localization and internationalization, RTL layouts
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    FinTech
    Blockchain Architecture
    Forex Trading
    Team Management
    Mobile App Development
    Solana
    Ecommerce Website Development
    Solidity
    Software Architecture & Design
    Full-Stack Development
    JavaScript
    Web Development
    MySQL
    Angular
  • $24 hourly

    • 5.0/5
    • (15 jobs)
    🏅𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 - 𝐓𝐨𝐩 𝟑% 𝗧𝗮𝗹𝗲𝗻𝘁. ⚡ Prompt answers to any contract/invite. 📌 I am committed to ensuring the success of your project. 𝗗𝗼 𝘆𝗼𝘂 𝗯𝗲𝗹𝗶𝗲𝘃𝗲🙇‍♂️ 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿𝘀 𝗰𝗮𝗻 𝘂𝗻𝗱𝗲𝗿𝘀𝘁𝗮𝗻𝗱 𝗮𝗻𝗱 𝗳𝗲𝗲𝗹 𝗲𝘅𝗮𝗰𝘁𝗹𝘆 𝗮𝘀 𝘆𝗼𝘂 𝗱𝗼 𝗿𝗲𝗴𝗮𝗿𝗱𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁, 𝘆𝗼𝘂𝗿 𝘃𝗶𝘀𝗶𝗼𝗻, 𝗺𝗶𝘀𝘀𝗶𝗼𝗻, 𝗮𝗻𝗱 𝗴𝗼𝗮𝗹𝘀? 𝗧𝗵𝗲 𝗽𝘂𝗿𝗽𝗼𝘀𝗲? Yes, I feel. See a review from the client. 🏆 𝗨𝗽𝘄𝗼𝗿𝗸 𝗖𝗹𝗶𝗲𝗻𝘁 𝗙𝗲𝗲𝗱𝗯𝗮𝗰𝗸: "Chirag Bhagat is a jackpot and a perfect addition to my team. He brought a great attitude and could carry everyone along ensuring everyone is up to date with his progress and next milestones. He is always available when you need him. One thing that stood out about Chirag and that I really appreciate about him is that he is self-motivated. He knows what needs to be done and jumps on it. He doesn't sit around waiting to be told what to do next. Looking forward to working with Chirag on more projects" - 𝙄𝙠𝙚𝙘𝙝𝙪𝙠𝙬𝙪 𝘾𝙝𝙧𝙞𝙨𝙩𝙞𝙖𝙣-𝙀𝙯𝙚𝙤𝙛𝙤𝙧, 𝘾𝙀𝙊 𝙃𝙌 𝘿𝙚𝙢𝙖𝙣𝙙 "Chirag impressed us with his ability to come up with simple and effective design solutions. Quite often, we thought we had the problem solved, yet Chirag showed us that this was not the case and suggested a solution. He is also very fast at learning new technologies and using them given his exposure to multiple programming paradigms. Would hire again for a backend programming project any day." - 𝗜𝗼𝗮𝗻𝗻𝗶𝘀 𝗧𝘀𝗶𝗼𝗸𝗼𝘀, 𝗦𝗸𝗶𝗻𝗻𝘆 𝗕𝗼𝘁𝘁𝗹𝗲 𝗟𝘁𝗱 I'm an 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲𝗱 𝗪𝗲𝗯 & 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 proficient in building complex backends and skilled in front-end development. My Back-End expertise like Node.js, Nest.js, Java, and PHP, while on the Front-End, I work with CSS, HTML, React, Next.js, Bootstrap, Flutter, and React Native. Also, experience in various 𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀. I've worked on creating blockchains, cryptocurrencies, tokens, NFT, NFT marketplace, and smart contracts using Solidity. 🏆 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗶𝗻 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 𝘀𝘂𝗰𝗵 𝗮𝘀: ➠ Artificial Intelligence. ➠ Blockchain Technologies(Solidity, Smart Contracts, Hyperledger) ➠ Web & Mobile App Development (React, Node, Vue - JavaScript, CSS, HTML, Android, React Native, Kotlin, Flutter, Native iOS, Swift) ➠ Database Management (SQL - MySQL, SQLite, MsSQL, NoSQL - MongoDB, Redis) ➠ Payment Integration (Stripe, Paypal) ➠ OOP Principles ➠ API integrations (Stripe, Pay Pаl, Twilio, DocuSign, Google Maps and other maps, Facebook, Twitter, Instagram, Hellosign, etc.) ➠ API development (PHP - Laravel, Node.js - Express.js, Firebase, Python - Django, Go - Golang). ➠ Server Configuration (Apache, Nginx) ➠ Version Control (SVN, GIT) ➠ Web Technologies (SSL, AJAX, JSON, XML, SOAP, CURL) ➠ Project Management Tools (Asana, Trello, YouTrack, Jira, Atlassian) 🤝 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝗼𝗻 𝗔𝗽𝗽𝗿𝗼𝗮𝗰𝗵: I'm not just focused on one-off projects. I'm committed to building long-term partnerships. I aspire to be your trusted developer, the one you rely on for top-notch professional work whenever you need it. Let's build a lasting relationship based on trust, quality, and mutual respect. 💯% 𝗠𝗼𝗻𝗲𝘆-𝗯𝗮𝗰𝗸 𝗚𝘂𝗮𝗿𝗮𝗻𝘁𝗲𝗲: Your satisfaction is my top priority. I'll gladly refund you for the initial stages of work if you're not satisfied within 1-2 weeks. 🔎 𝗦𝘁𝗶𝗹𝗹 𝗹𝗼𝗼𝗸𝗶𝗻𝗴 𝗳𝗼𝗿 𝗮 𝗥𝗲𝗮𝘀𝗼𝗻? ❖ I don't just work on projects. I believe in building 𝗹𝗼𝗻𝗴-𝘁𝗲𝗿𝗺 𝗰𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝗼𝗻𝘀. ❖ Customized Solutions for Web & Mobile Platforms. ❖ I create well-documented, user-friendly REST APIs, ensuring seamless integration. ❖ 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗶𝗻 𝗨𝗜/𝗨𝗫. ❖ Clear and 𝗲𝗳𝗳𝗲𝗰𝘁𝗶𝘃𝗲 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻 is my commitment. ❖ 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗮𝗻𝗱 𝗿𝗲𝗹𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆 are at the core of my work. ❖ Competitive Pricing without Compromising 𝗤𝘂𝗮𝗹𝗶𝘁𝘆. 𝗜𝗳 𝘆𝗼𝘂'𝗿𝗲 𝗹𝗼𝗼𝗸𝗶𝗻𝗴 𝗳𝗼𝗿 𝘀𝗼𝗺𝗲𝗼𝗻𝗲 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲 𝘁𝗼 𝘁𝗮𝗸𝗲 𝗰𝗵𝗮𝗿𝗴𝗲 𝗮𝗻𝗱 𝘀𝗲𝗲 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝘁𝗼 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗶𝗼𝗻 𝘄𝗶𝘁𝗵𝗼𝘂𝘁 𝗻𝗲𝗲𝗱𝗶𝗻𝗴 𝗰𝗼𝗻𝘀𝘁𝗮𝗻𝘁 𝘀𝘂𝗽𝗲𝗿𝘃𝗶𝘀𝗶𝗼𝗻, 𝗹𝗲𝘁'𝘀 𝗱𝗶𝘀𝗰𝘂𝘀𝘀 𝗵𝗼𝘄 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽. Regards, Chiraag.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Cryptocurrency
    Blockchain Development
    WordPress e-Commerce
    NFT Marketplace
    SaaS
    JavaScript
    PHP
    React Native
    Java
    Android App Development
    API Integration
    Node.js
    React
    Mobile App Development
  • $55 hourly

    • 5.0/5
    • (19 jobs)
    Hi there! If you're visiting my page, perhaps you're looking for a professional. I'm a software developer, programmer, and tech lead with 7 years of experience in the industry. My strong sides are responsibility, attention to client's needs, strong will to achieve the final results of team efforts. I've been working with various programming languages and platforms. My favor is Python for the last 6 years. Also been experienced with JS, PHP, Android, Java, Dart. It's enough comfortable for me to work both in the team and stand-alone development. I can do IT =)
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Web Development
    RESTful Architecture
    Angular
    Android
    Raspberry Pi
    Django
    React
    Machine Learning
    JavaScript
    TensorFlow
    Python
  • $20 hourly

    • 5.0/5
    • (66 jobs)
    ■ Programming languages: Java SE/EE, Spring (MVC,Boot,IOC), JDBC, SQL, Object-Oriented Programming (OOP), JSP,Node,Soldity,Javascript, Angular,React, ■ Web and Mobile Automation tools: Java, Selenium WebDriver, Spring MVC, Maven, TestNG/JUnit, Firebug, Appium, ADB, UIAutomator; ■ Webservers: Tomcat,GlassFish,Oracle WebServer; ■ Good knowledge of Java programing patterns; ■ Performance/Load tools: Jmeter; ■ Test Environments: Local, Grid, BrowserStack, Sauce Labs, AWS Farm Devices, Docker; ■ Web programming languages/technologies: HTML, Angular ,React, CSS, JavaScript, XPath, XML, JSON; ■ IDE: Eclipse; ■ CI: Jenkins(Pipelines); ■ Control version system: GIT, SVN; ■ API: SOAP, REST; ■ Issue/Story Trackers: Jira, Redmine, Track Studio, HPQC, Rally; ■ OS: Windows XP/7/8.1/10, Linux Cent OS/Ubuntu, Android, IOS, (VMware Workstation); ■ MS Office;
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Spring Boot
    Hibernate
    Java Persistence API
    DApps
    Java
    Ethereum
    Blockchain Architecture
    Node.js
    IBM Blockchain
    Solidity
    web3.js
  • $70 hourly

    • 5.0/5
    • (40 jobs)
    I have been an IT engineer for more than 12 years, including the Backend part, Database optimization, Server setup, WEB3, DevOps, custom blockchain development, and API of other Services. Have experience in developing projects from the very start in JavaScript, Golang, Rust, C++, Dart, Erlang, and Solidity. I am highly responsible for my work, punctual, and attentive to little details. I like complex tasks to do and finding nonlinear decisions. I was part of a team of such big projects as: - Elrond (EGLD) : Launch of IEO, development of a sharding system; - Crypto wallet Bread (BRD) : Development and audit of payment gateways; - CoinPayments : Development of payment gateways and storage of cryptocurrency funds. By working with me, you can be sure of the stable functioning of your application. Listed below are my experience and skills. – JavaScript (ReactJS, NodeJS, ECMAScript); – WebAssembly; – C++; – Rust; – Solidity; – Erlang; – Dart; – Golang. – GraphQL; – PostgreSQL; – LevelDB; – RocksDB. – PlayCanvas; – WebXR. – Blockchain Protocols; – Copy trading protocols and architecture; – Smart Contract Audit; – Exchange development (CEX); – Decentralized exchange development (DEX); – Arbitrage and Trading bots development; – ICO/IDO/IBCO/LBP/IFO; – Flash loans bots; – Front-running, snipe, and sandwich bots; – Wallet (flutter) development configuration; – TradingView configuration; – Meta; – Metaverse; – DeFi; – NFT; – GameFi. I've worked with the following services: – AWS (EC2, ELB, ASG, RDS, ElastiCache, S3); – AWS Serverless Fundamentals (Lambda, DynamoDB, Cognito, API Gateway); – Monitor, Trace and Audit your microservices using CloudWatch, X-Ray, and CloudTrail; – Linux, AWS, Bash & Python Scripting, Jenkins, Ansible, Docker, Kubernetes, Cloudformation, Terraform; – Sentry; – Pingdom; – Supervisor; – uWSGI; – Vagrant; – Git, CLI; – Ansible; – Apache; – Datadog; – Docker, Docker Compose; – Gunicorn; – Nginx. – CCXT; – OpenDAX; – OpenZeppelin Truffle; – MetaMask; – Ganache; – Remix IDE; – Geth; – Parity; – Web3.js – Ethers.js; – Infura; – Embark; – Brownie; – Alchemy; – Drizzle. – Bitcoin; – Lightning Network; – Ethereum Smart Contracts(ERC-20, ERC-721, ERC-223, ERC-777, ERC-1155, ERC-1337, ERC-3643 (ex-T-REX) and the ERC-1400); – Binance Smart Chain (BNB); – Cardano (ADA); – Solana (SOL); – Avalanche (AVAX); – Terra (LUNA); – Polkadot (DOT); – Polygon (MATIC); – Cosmos (ATOM); – Chainlink (LINK); – NEAR Protocol (NEAR); – Uniswap (UNI); – TRON (TRX); – Decentraland (MANA); – PancakeSwap (CAKE); – Toncoin (TON).
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    web3.js
    Golang
    React
    JavaScript
    Solidity
    Blockchain, NFT & Cryptocurrency
    Smart Contract
    Blockchain Development
    Blockchain Security
    Bitcoin
    Web3
    Network Architecture
    Blockchain Architecture
  • $100 hourly

    • 4.8/5
    • (32 jobs)
    Thank you for stopping by! As a computer science graduate with a Gold Medal, I have a deep passion for learning and staying up to date with the latest trends and technologies in the industry. I am constantly evolving as a student of something new all the time. My expertise lies in developing full-stack Blockchain Solutions, Mobile and Web Applications, Cloud Solutions, and active participation in research work for core computer science subjects. Here are my key skills and experience: - Developing full-stack Blockchain Solutions: I can help you with core network setup, architecture design, business logic implementation, and front-end and application design. - Developing full-stack Mobile and Web Applications: I have experience with trending stacks such as MERN and I am always eager to learn more. - Cloud Solutions: I have helped clients build their application infrastructure on both Amazon Web Services and Google Cloud Platform, providing a complete solution from ground up. - Academia: I am actively participating in research work for core computer science subjects such as Networking, Distributed Computing, and Blockchain Computing. I have also taught lectures on Blockchain Computing for various age groups. With my expertise and experience, I offer crystal-clear communication, high availability, free consultations over calls, and a friendly attitude towards my clients. Let's work together and make your project a success!
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Node.js
    Blockchain Architecture
    React
    TRON
    API Development
    API Integration
    JavaScript
    Smart Contract
    Mobile App Development
    Blockchain Development
    AWS Application
    Desktop Application
  • $70 hourly

    • 5.0/5
    • (28 jobs)
    As a web developer with 9+ years of experience, I am proficient in a wide range of technologies and tools. My stack includes: Programming languages: PHP, Python, JavaScript, Node.js, HTML, CSS Frameworks and libraries: Laravel, Django, Vue.js, React, Angular CMS, e-commerce: WordPress, Shopify Databases: MySQL, MongoDB, PostgreSQL Operating systems: Linux, macOS Web servers: Apache, Nginx Version control: Git Testing and automation: Selenium Deployment and hosting: AWS, GCP, DigitalOcean In addition I am also experienced in web3 development, including the creation of trading bots and smart contracts. My web3 stack includes: Web3 libraries: Web3.js, ethers.js Blockchain platforms: Ethereum, EOS Programming languages: Solidity, Vyper I have over 8.5K hours of experience on Upwork and a strong track record of delivering high quality, responsive, and user-friendly solutions for my clients. Let's work together to bring your project to life!
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Web3
    Cryptocurrency
    PayPal Integration
    Solidity
    Smart Contract
    Google APIs
    WordPress
    CSS 3
    Vue.js
    Laravel
    jQuery
    PHP
    Python
    Shopify
  • $80 hourly

    • 5.0/5
    • (126 jobs)
    ✅ Top Rated ✅ 5 Stars feedbacks ✅ 10 Years experience in development I'm from Latvia! Skilled with both front-end and back-end with an eye for innovative and exclusive designs. I've got experience in Solidity and Blockchain fundamentals, I can help You out with most of the crypto-related tasks, setting up blockchain explorer, generating your own currency or writing smart-contracts on Ethereum Network for Decentralized Exchange I also specialize in HTML, CSS, Javascript, jQuery, Bootstrap, PHP, Node.Js, React, Angular, MongoDb, WordPress, Shopify, Braintree, and a whole host of other technologies, platforms, and libraries. Whatever your needs are, I will find a solution that fits it. I can be a complete solution to most of the web-related tasks from simple HTML pages and Photoshop edits to complex E-commerce frameworks and database management activities. My passion is design and art, which is also reflected on art of writing code and solving IT problems. Fast learner and adaptable to different project environments. Team player, but can also work solo. 🤘🌟👨‍💻
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Ethereum
    Web Design
    Unit Testing
    Smart Contract
    Blockchain Development
    Solidity
    Cryptocurrency
    web3.js
    Web Development
    Angular
    React
    JavaScript
  • $35 hourly

    • 4.9/5
    • (30 jobs)
    So you're looking for a great developer or team developer who not only can help you with development but also can give consultant for you and make your app become great. We have 8 years of experience with blockchain. We specialize in providing DeFi app development and operation solutions. We have developed many DeFi app like DEX (staking and farming) , DEX aggregator, NFTs gaming, yield farming platform, lending & borrowing platform,… The networks that we have developed are Binance Smart Chain (now is BNB), Ethereum, Fantom, Celo, Avalanche, Solana and Near, … We also develop app on mobile and website. Our technical stack: - Smartcontract: Rust, Solidity, Hardhat, Truffle - Backend: NodeJS, Python, AWS, MongoDB, MySQL - Frontend: ReactJS, NextJS, EtherJS - Mobile: React Native, Flutter - Server: Ubuntu, Centos, AMI, ... If you want to own a DeFi platform, DM me and we will advise you build your dream with low budget and great satisfaction.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Web Development
    Blockchain Architecture
    Smart Contract
    Next.js
    Solidity
    Rust
    Flutter
    Amazon Web Services
    MySQL
    Python
    React Native
    JavaScript
    Node.js
    React
  • $40 hourly

    • 5.0/5
    • (44 jobs)
    My strongest powers are my tech stack and comprehensive experience. I’ve already done tens of development projects, and I'm not going to stop. Check some of my professionalism guarantees: • 10000+ hours worked on Upwork • 70+ successfully executed projects • Excellent troubleshooting skills • Exceptional Top Rated Plus engineer + • 48 satisfied customers
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Python
    Flutter
    Swift
    Front-End Development
    Back-End Development
    Mobile App Development
    React Native
    Full-Stack Development
    NestJS
    Nuxt.js
    Node.js
    ExpressJS
    TypeScript
    JavaScript
    React
  • $30 hourly

    • 4.3/5
    • (13 jobs)
    I am great at analyzing and creating smart contracts. I have created several different blockchain forks and used testing frameworks extensively.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Vue.js
    Solana
    Next.js
    Solidity
    Smart Contract
    Blockchain Architecture
    Bitcoin
    DApp Development
    Rust
    Ethereum
    web3.js
    React
    JavaScript
  • $50 hourly

    • 5.0/5
    • (36 jobs)
    I am here to do any kind of web development task for you, and specially if it's WordPress or Shopify related, I'm the one whom you're looking for :) During the NFT boom, got a good knowledge and experience of the NFTs. I did work on 6 NFT projects as a developer. I'm a web developer having 6+ years experience and PHP, MySQL, Laravel, JS, jQuery, Liquid, HTML and CSS are the languages that I have been playing with all this time. I have been mostly working on plugin / add-on development and it's been my favorite. I have developed over 50 custom WordPress plugins for my clients. I also have fixed bugs and customized a lot of websites, also designed some from scratch.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Blockchain Development
    Cryptocurrency
    Shopify Apps
    Mobile App Development
    Ecommerce Website Development
    MySQL Programming
    Plugin Development
    Theme Development
    WooCommerce
    Shopify
    WordPress
    PHP
    Laravel
  • $99 hourly

    • 5.0/5
    • (30 jobs)
    After working in 5 startups and 3 Sillicon Valley companies, I have a long history of designing, developing and deploying entire Blockchain and Full Stack solutions to companies of all sizes. I'm proficient with web3, front end and back end development. Another advantage that I have are my communication skills: I'm good at listening to the client, understanding the requirements and delivering effective and efficient solutions with aggressive deadlines. I have developed multiple projects with great client satisfaction. Some examples include: - NFT Marketplace with tokens reedemable for physical assets (Solidity) - NFT minter for videogame startup (Solidity) - Backend for NFT minting site (Javascript/Typescript) - Taxable ERC20 Token (Solidity) - ERC20 Token on Pancakeswap for a Virtual Reality startup (Solidity) - NFT Smart Contract Audit (Solidity) We can meet for a demo, I can show you the above examples and more. I have extensive experience with Solidity, Hardhat, Python Flask, Python Django, React, React Native, Angular, Ionic, TypeScript, JS and JS frameworks/libraries in general. I'm confident my skills will be very valuable to your project. I understand that you are on a tight schedule. I'd like to follow up ASAP to maximize available time. Please let me know when you're available so we can discuss this in depth. Cheers!
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Solidity
    Smart Contract
    React Native
    C#
    Django
    Flask
    HTML5
    CSS 3
    React
    JavaScript
    Angular
    jQuery
  • $40 hourly

    • 4.3/5
    • (8 jobs)
    With 10 years of software development experience, my skill set includes expertise in frontend, backend, and devops domains. Throughout my career, I have had the opportunity to work remotely in small and medium teams on a variety of projects. This exposure to diverse responsibilities has allowed me to explore and become proficient in a wide range of technologies, frameworks, and development methodologies. I have thrived in fast-paced and ever-changing startup environments, where adaptability and quick learning are key. After spending 7 years as a fullstack developer, I decided to specialize in backend engineering and have since predominantly utilised the Golang programming language. My passion for blockchain technology has led me to actively participate in multiple projects in this field. Here are some of the technologies and frameworks I have worked with: Backend: - Proficiency in Golang and Node.js. - Leverage of node.js frameworks like Express.js, Nest.js and Koa. - Leverage of Golang frameworks like Gin and Echo. - Undertaken side projects involving Rust and Python. Databases: - Competence in SQL databases such as PostgreSQL and MySQL. - Experience with NoSQL databases like MongoDB. - Familiarity with time series database like TimescaleDB. APIs and Communication: - Proficient in building REST, GRPC, and GraphQL APIs. - Skilled in implementing authentication mechanisms using JWT, OAuth, and session cookies. - Experience working with event-oriented architectures utilising NATS, Kafka, and SQS. Monitoring and Logging: - Utilised Sentry and Prometheus for monitoring applications. - Employed Papertrail for effective logging. Devops: - Proficient in setting up pipelines using GitHub Actions and CircleCI. - Experienced in containerization using Docker and Kubernetes. - Skilled in serverless architecture and setting up Lambda functions. - Proficient in using infrastructure-as-code tools such as CDK and Terraform. - Hold an AWS Solutions Architect Certificate. - Familiarity with multiple cloud providers including AWS, Azure, GCP, and OpenStack, gained through the development of a deployment client tool. Frontend: - Proficiency in HTML, CSS, and JavaScript. - Expertise in frontend frameworks such as React and Angular. - Experienced in server-side rendering using Next.js. - Utilized UI frameworks like Material UI and Bootstrap. - Knowledgeable in optimizing application bundles using webpack. My extensive experience across these domains showcases my adaptability and versatility as a developer. I am confident in my ability to deliver high-quality solutions that meet the requirements of each project I undertake.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Linux System Administration
    DevOps
    Agile Software Development
    JavaScript
    Git
    Node.js
    React
    MongoDB
    Docker
    PostgreSQL
    Golang
  • $30 hourly

    • 4.8/5
    • (47 jobs)
    I am Nishant, Helping entrepreneurs and corporates to build Decentralised AI Agents and web4.0 solutions. I help customers starting with Consulting to building Scalable solutions with fast turnaround time. ⚡My Offerings ⚡ ⭐ AI Development Services: AI Agent Development, Business Automation, Natural Language Processing, Computer Vision, and Reinforcement Learning, AI Agent Development ⭐ ML Development - Design and deploy robust Machine Learning models for predictive analysis, pattern recognition, and data-driven decision-making. ⭐ Blockchain Development - DePIN, DApps, smart contract creation, token development, crypto launchpad. Solidiy, Rust. ⭐Layer 2 Blockchain development - Zero Knowledge Roll ups, Plasma, state channels, web3 payment gateway development, side chains, Immutable X blockchain development 🎯Technical expertise ✅Programming Languages: Python, JavaScript, Solidity, C++, Rust ✅AI/ML Frameworks: TensorFlow, PyTorch, sci-kit-learn ✅Blockchain Technologies: Ethereum, Binance Smart Chain, Hyperledger Fabric, Corda ✅Web Technologies: React.js, Node.js, Web3.js ✅Database Systems: MongoDB, MySQL, PostgreSQL ✅Smart Contracts and DApp Development: Solidity, Truffle, Remix 🔑Industries ✅ Real estate ✅ Healthcare ✅ Gaming ✅ e-commerce ✅ Supply Chain 🖌️🎨What my track record says 🏆have built successful MVP’s & products which has raised funding of more than $12M. 🏆40+ client served globally , 95% clients with repeating their business and spreading words about our excellency , Top notch tech solution/service. 🏆Helping Gaming companies to onboard their next 100 millions users using blockchain and have control of their assets in game 🏆A passion for staying ahead of the curve, implementing the latest technologies for unparalleled results Have something exciting in mind? Click for a consultation and let’s make it a 100 Billion 🚀 fortune together.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Unreal Engine
    ARKit
    RealityKit
    Hyperledger Fabric
    NFT Marketplace
    iOS Development
    Augmented Reality
    Blockchain Development Framework
    Blockchain Architecture
    Solana
    Rust
    DApps
    Blockchain Development
    C++
  • $40 hourly

    • 4.6/5
    • (30 jobs)
    💡𝗔𝗯𝗼𝘂𝘁 𝗠𝗲: 🌐 10 years of full-stack web development experience (Java EE, Spring, JS) 🌐 Extensive experience in FinTech, CRMs, and blockchain projects as a Team Lead 🌐 Experience with cryptocurrency development (Ethereum, Smart Contracts) 🌐 Can help your organization launch an ICO (initial coin offering) 🌐 Unit testing, Acceptance/Automation testing 🌐 Cryptocurrency wallet and exchange development 🌐 Ethereum development (smart contracts written in Solidity, ERC20 tokens, etc) 🌐 ICO technical consulting, smart contract security auditing, blockchain consulting 💡𝗠𝘆 𝗺𝗮𝗶𝗻 𝗦𝘁𝗮𝗰𝗸: With Solidity, I don't just code - I compose a masterpiece of smart contracts, and there are no tasks I couldn't make. So, I'm fluent with: - Solidity, Go, JavaScript, Node.js, React.js - ethers, hardhat, chai, matcha, API, various frameworks, сryptography, cryptocurrencies; 💡𝗣𝗼𝗿𝘁𝗳𝗼𝗹𝗶𝗼 🏦 - EuropaLabs - Led development for NFT-driven ticketing flow for the most profitable ultraclub by square foot. Built Web3 optimized operational flow for token-gated event access to IRL events. 💰 - Lympo - The NFT platform is undergoing changes – prepare to experience a new era of Lympo and get ready for the world of SPORT! 💼 - DuckSTARTER - is DuckDAO’s public token launchpad, a service platform for blockchain projects. It will act as the final bridge between early-stage projects and the community before the project goes fully public. 📜 - Smart contracts....thousands of them 🏄🏼‍👽 🏆 I'm super curious about Dapps, FinTech, CRMs, DeFi LETS PUMP IT UP TOGETHER!🎯🚀
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Java
    Ethereum
    GitHub
    JavaScript
  • $50 hourly

    • 5.0/5
    • (75 jobs)
    Hi! I'm a Full Stack Blockchain and a Subgraph (TheGraph) developer. I've more than two years of experience in writing smart contracts and building decentralized applications. I graduated from University of Karachi with a Bachelor's degree in Software Engineering in 2020, and have spent the last year working on blockchain based projects. In my journey I have built different types of decentralized applications including DeFi, NFT, Interoperability (bridges), ICO, Staking and E-commerce. Skills : - Solidity Programming - Understanding of Foundry, Hardhat, Truffle ((incl. Unit Testing) - Understanding of MetaMask & other Wallet APIs - React/Next JS/ Typescript - Web3 / Ethers JS - Subgraphs (Indexing protocol for querying networks like Ethereum) I'm looking forward to working with you!
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Web3
    Ethers.js
    Smart Contract Development
    Blockchain, NFT & Cryptocurrency
    React
    DApps
    Web Development
    Node.js
    web3.js
    Solidity
    Blockchain Development
    JavaScript
    Ethereum
    Smart Contract
  • $60 hourly

    • 4.8/5
    • (13 jobs)
    ⭐⭐⭐⭐⭐ "Akhil is totally fantastic. His work had a tremendous impact on our product. He is very punctual, responsive, and professional in every way imaginable." Some key highlights about me: ✅More than 5 years of web3 development experience ✅Full stack development capability (I have experience working with Solidity, React, NodeJS, Typescript, Go, Python and many more ) ✅I run Coding Sheep, a web3 dev shop and helped more than 20+ projects in last 2 years. ✅24/7 ultra-reliable communication: you will always be aware of the project status Some of the products that i am proud of ❤️ Nibbl : A NFT fractionalisation platform and marketplace. ❤️ Density : A cutting edge crypto derivative exchange 🏆 Why you should choose me over other freelancers 🏆 1️⃣ Client Reviews: I focus on providing value to all of my clients and earning their TRUST. 2️⃣ Responsiveness: being extremely responsive and keeping all lines of communication readily open with my clients. 3️⃣ Resilience: For any issue that my clients face, I attack them and find a solution.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    DApps
    React
    Elliptic Curve Cryptography
    Cryptocurrency
    Bitcoin
    NFT Marketplace
    Ethereum
    Blockchain Development
    web3.js
    Node.js
    Solidity
    Tezos
    Smart Contract
  • $25 hourly

    • 5.0/5
    • (103 jobs)
    * Web Platform Development * Mobile Apps Development I have more than 16 years of experience in the software development industry. I have been involved in different projects from scratch, including iPhone, iPad, Android apps, websites, and enterprise-level applications. We have used Objective C, Swift/SwiftUI, Kotlin, Flutter, Java, and Hybrid Platform like React Native. Expert in Java J2EE, Spring, Node JS, React JS, Angular, and databases (MySQL, MariaDB, MongoDB, Sqlite, MS-SQL, and Oracle) Web development includes PHP, Java, Laraval, and open-source tools WordPress, Joomla, Drupal and Shopify, Big Commerce, Woo-commerce. In the modern era, people have a great sense of the quality of the product. To enhance my skills for understanding the overall attributes of quality, I got a degree in MS Total Quality Management.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Software Design
    DevOps
    WordPress
    FinTech Consulting
    Agile Project Management
    MySQL Programming
    Laravel
    Android App Development
    PHP
    Java
    Node.js
    iOS Development
    React
    React Native
  • $55 hourly

    • 4.8/5
    • (56 jobs)
    A professional software developer who enjoys programming with modern technologies such as Blockchain, AI, Auto-scripting. I launched 20+ large scale web applications including the various technologies and frameworks such as REST API, React/Vue/Typescript, Postgres, MongoDB, Docker, Node/Express, Python, Django/Flask, PHP, Laravel, etc. I am an independent freelancer, working here to get a long-term contract where I can build my career. Please feel free to contact me to discuss further details. Thank you for visiting my profile.
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    React Native
    Swift
    iOS Development
    Smart Contract
    React
    Node.js
    JavaScript
    Vue.js
    Database Design
    Laravel
    Python
    PHP
    TypeScript
    Django
  • $20 hourly

    • 5.0/5
    • (4 jobs)
    Blockchain developer, specialized in custom cryptocurrency and blockchain development. I have extensive experience in ICO, POS – Proof of Stake, blockchain website, web portal, & smart contracts application development. I am very proficient with the solidity programming language, Ethereum, token generation, digital currency exchange, proof of work (POW), and building innovative, highly customized, robust, feature-packed, and modular blockchain development solutions. I am responsible for designing and implementing new innovative features and functionalities, establishing the blockchain, cryptocurrency, ICO, smart contracts application architecture, ensuring high-performance and availability, and managing all blockchain development & technical aspects. I work closely with project stack holders and end customers to provide an effective, visually appealing, and intuitive implementation. As a full-stack blockchain developer & solidity programmer, I have successfully delivered a wide range of custom cryptocurrency and blockchain development projects using the smart contracts solidity language with eye-catching user-friendly UI design and high-end functionalities. I understand all aspects of developing Blockchain applications: design, architecture, development, and publishing. With the consummate evaluation of your blockchain development requirements and comprehensive engagement in blockchain technology, I provide custom application development, token generation, creative theme development, and maintenance services that cater to myriad industry verticals. Are you looking full time & dedicated blockchain developer to develop a user-friendly high-end functionality based ICO, cryptocurrency or smart contracts web application? I will love to engage myself as a full-stack blockchain developer and assist you with innovative and creative strategies. My Technical Blockchain Development Expertise: ⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷ Being a full-stack blockchain developer, I have decent expertise in Blockchain development and custom smart contract application development technologies: ✅ Server-Side Languages: PHP, Node JS ✅ Frameworks: Express Js, YII2, Laravel, CakePHP ✅ JavaScript Frameworks: Angular Js, Jquery. ✅ Smart contract language: Solidity ✅ Data Management: o RDBMS: MySQL 5.X, PostgreSQL, Amazon RDS o NoSQL: MongoDB. o Caching: Memcached, Redis o Searching: Solr, Lucene, Elasticsearch, Amazon CloudSearch ✅ Queue: ActiveMQ, Amazon SQS ✅ Server Technologies: Linux, Ubuntu ✅ Cloud Computing Platforms: Amazon Web Services ✅ Frontend Stack: o Languages: HTML5, CSS3, Sass, JavaScript o UI Frameworks: Bootstrap, jQuery UI o JavaScript Frameworks: React, Backbone.js, Angular 2 ✅ Third-Party APIs Integration: o Payment Gateway: PayPal, Stripe, Authorize.Net, Coinpayments.net o Social: Facebook, Twitter, Google+ o Geo-location: Google Maps, Bing Maps o File Storage: Dropbox, Google Drive Blockchain Development Services We Offer: ⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷ Being a full-stack blockchain developer & solidity programmer and associated with an ISO certified blockchain development company, I develop rapid, error-free website & web applications to achieve an enterprise's functionality implementation and business logic with minimum complexities ✅ Custom Blockchain Development ✅ Smart Contracts Development ✅ dApps Development ✅ Crowdsale ✅ Hyperledger & Multichain Development ✅ Multichain/Supply Chain Development ✅ Custom Cryptocurrency Development ✅ Crypto App Development ✅ ICO Web Development ✅ POC Development ✅ Cryptocurrency Wallet and Exchange Applications ✅ Private Blockchain Development ✅ Blockchain Consulting ✅ Blockchain Testing ✅ Ongoing Blockchain Development Support and Maintenance ✅ Full-Stack Blockchain Development ✅ Full Time Dedicated Blockchain Developer ✅ Half Dedicated Blockchain Developer Hourly Basis How do we communicate and report? ⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷ We always prefer to keep our work transparent, and for this reason, we like to be in touch with our valued clients on a daily, weekly & monthly basis. According to the requirement, we use many types of project management tools for the blockchain development project's communication. ⦿ Upwork Message Board ⦿ JIRA ⦿ Azure DevOps Server ⦿ Asana ⦿ Trello ⦿ Zoho Projects
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Blockchain Security
    DApps
    Blockchain Development Framework
    Blockchain, NFT & Cryptocurrency
    NFT
    web3.js
    Bitcoin
    Cryptocurrency
    Node.js
    Solidity
    Blockchain Architecture
    Blockchain Development
    Web Development
    Ethereum
  • $50 hourly

    • 5.0/5
    • (10 jobs)
    ✅ Top Rated ✅ 5 Star feedbacks ✅ 4+ Years Experience in Development Welcome to my profile! I'm an experienced Ethereum and Solana Blockchain Developer dedicated to crafting innovative solutions for your decentralized projects. With expertise in DApp development, smart contracts, and ERC/SPL tokens, I offer tailored solutions to meet your needs. What I Offer: DApp Development: Harness blockchain potential with seamless DApp development, ensuring security and scalability for enhanced user experiences. Smart Contracts: Write reliable Solidity and Rust smart contracts for various use cases, from ICOs to DeFi protocols, ensuring code efficiency and robustness. ERC & SPL Tokens: Create custom ERC-20, ERC-721, and SPL tokens adhering to Ethereum and Solana standards, enabling tokenization and asset management functionalities. Contract Auditing: Identify vulnerabilities and ensure smart contract security through comprehensive auditing services, minimizing potential exploits. Integration & Deployment: Seamlessly integrate DApps and smart contracts with Ethereum and Solana blockchains, managing the entire deployment process for a smooth transition to production. Blockchain Consultation: Receive expert advice on blockchain integration and feasibility assessments, exploring potential use cases for your business. Why Choose Me: Expertise: Years of hands-on experience in blockchain development, specializing in Ethereum and Solana protocols. Custom Solutions: Tailored solutions to meet unique project requirements, ensuring optimal results. Reliability: Timely delivery and transparent communication throughout the development process. Security-Focused: Implementation of industry best practices to safeguard projects against potential threats. Ready to leverage Ethereum and Solana for your next project? Let's connect and discuss your ideas. I'm excited to contribute to your journey towards decentralized innovation!
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    DApps
    Ethereum
    Smart Contract
    Blockchain Development
    Solana
    React
    Solidity
    web3.js
    Blockchain Architecture
    Node.js
    Truffle
    Initial Coin Offering
    Cryptocurrency
    Cryptography
    Rust
  • $50 hourly

    • 5.0/5
    • (31 jobs)
    I specialize in architecting and building systems using Golang and Python, specifically with FastAPI and Django. I have extensive experience working with these frameworks, utilizing them to efficiently develop prototypes and MVPs, as well as designing robust, high-performing, and scalable production systems. Additionally, I am well-versed in creating APIs with Django REST Framework, performing task-based processing with Celery, and integrating various external systems. As a full stack software engineer, I am highly proficient in React, Vue, and the essential HTML/CSS/Javascript components necessary for frontend development in any application. In addition to my expertise in web development, I also possess knowledge in low-level systems and native Android development. Furthermore, I have experience in data science and visualization, familiarizing myself with the scientific Python stack and D3 JS. My technical stack: AWS, Google Cloud, Golang, Python, Django, RestAPI, Multiprocessing, Scrapy, Blockchain, Ethereum, Solana, HBAR, L1 and L2 blockchains, Microservices, AWS Lambda, AWS Step Functions, AWS S3, GRCP
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    Ethereum
    Android SDK
    iOS Jailbreaking
    AWS Cloud9
    Golang
    iOS Development
    Python
    AWS Lambda
    Google Cloud Platform
    Java
    Android App Development
  • $19 hourly

    • 3.9/5
    • (57 jobs)
    I am a software engineer, Blockchain developer, and web developer,I am a writer also ,I like to write travelogue and stories, I have done Translation job also. Smart Contract Audit GoLang C C++ Jquery Nodejs MongoDb Docker IPFS Swagger java Solidity Web3 Cryptography Mocha /chai /sinon unit testing Git/Github Requirejs Ethereumjs Bug fixing with blockchain wallet integration Using Restful webAPI and integrate into blockchain Using RPC/JSON server and adding into blockchain Creating fully functional cryptocurrency exchange
    vsuc_fltilesrefresh_TrophyIcon Blockchain
    React Native
    Database
    Solidity
    Smart Contract
    Creative Writing
    DApps
    Solidify
    Front-End Development
    React
    HTML5
    MySQL
    Node.js
  • Want to browse more freelancers?
    Sign up

How it works

1. Post a job (it’s free)

Tell us what you need. Provide as many details as possible, but don’t worry about getting it perfect.

2. Talent comes to you

Get qualified proposals within 24 hours, and meet the candidates you’re excited about. Hire as soon as you’re ready.

3. Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

4. Payment simplified

Receive invoices and make payments through Upwork. Only pay for work you authorize.

Trusted by

How to Hire Top Blockchain Developers

What is a blockchain developer?

From cryptocurrencies to initial coin offerings (ICOs), smart contracts, and supply chains, the blockchain promises better security, transparency, and accountability to the business world. If you’re looking for a freelancer who can help you implement your own blockchain, consider hiring a blockchain developer.  

How do you hire a blockchain developer?

You can source blockchain developers on Upwork by following these three steps:

  • Write a project description. You’ll want to determine your scope of work the skills and requirements you are looking for in a blockchain developer.
  • Post it on Upwork. Once you’ve written a project description, post it to Upwork. Follow the prompts to help you input the information you collected to scope out your project.
  • Shortlist and interview blockchain developers. Once the proposals start coming in, create a shortlist of the candidates you want to interview. 

Of these three steps, writing your project description is the most important. It’s where you will determine your scope of work, the specific type of blockchain developer you need for your project, and your budget.

How much does it cost to hire a blockchain developer?

Rates can vary due to many factors, including expertise and experience, location, and market conditions.

  • An experienced blockchain developer may command higher fees but also works faster, has specific areas of expertise, and delivers higher-quality work.
  • A contractor who builds a client base may price services more competitively.

Rates charged by blockchain developers on Upwork are:

  • Beginner: $30 per hour
  • Intermediate: $45 per hour
  • Advanced: $59 per hour

Why hire a blockchain developer?

The trick to finding the best candidate is to identify your needs. 

  • Blockchain developers can assist with technology integration into business processes. This can lead to the improvement of operational efficiency and productivity. 
  • Experienced specialists can help develop hack-proof apps or platforms to guarantee fast and safe exchange of digital currencies. 
  • Experts in blockchain technology are always up-to-date with the latest trends. This allows them to build effective strategies for their clients to achieve short and long-term goals. 

Why blockchain matters

First, what is blockchain? In short, it is a distributed database designed to ease transactions and keep track of assets. This may seem like a straightforward goal, but it is a problem for consumers, businesses, financial institutions, and governments.

These inefficiencies can slow down the pace of business, leading to lost revenue for individual companies and lower growth for the economy as a whole. Blockchain has the potential to solve many of these problems.

Blockchain developer FAQ

How do you write a blockchain developer job post?

Your job post is your chance to describe your project scope, budget, and talent needs. Although you don’t need a full job description as you would when hiring an employee, aim to provide enough detail for a contractor to know if they’re the right fit for the project.

Job post title

Create a simple title that describes exactly what you’re looking for. The idea is to target the keywords your ideal candidate will likely type into a job search bar to find your project. Here are some sample blockchain developer job post titles:

  • We are looking for a seasoned blockchain developer 
  • A junior blockchain developer is needed
  • A fintech company is looking for a blockchain DevOps engineer

Project description

An effective blockchain development job post should include the following: 

  • Scope of work: List all the deliverables you’ll need, from smart contracts to supply chains.
  • Project length: Your job post should indicate whether this is a smaller or larger project.
  • Background: If you prefer experience working with productivity tools, blockchain protocols, or other technologies, mention this here.
  • Budget: Set a budget and note your preference for hourly rates vs. fixed-price contracts.

Blockchain developer responsibilities

Here are some examples of blockchain developer job responsibilities:

  • Research, design, and test blockchain technologies 
  • Work with the development team and project managers to architect the necessary infrastructure
  • Ensure data configuration follows security protocols, privacy documents, and other requirements. 

Blockchain developer requirements and qualifications

Be sure to include any requirements and qualifications you seek in blockchain development. Here are some examples:

  • Programming languages such as Solidity (for Ethereum), C++, Java, JavaScript, etc.
  • Popular blockchain development platforms such as Ethereum, Hyperledger, etc.
  • Database languages such as SQL
  • Application-specific knowledge (e.g., cryptocurrencies, smart contracts, ICOs, etc.)

Ready to integrate advanced technologies into your business process? Hire the best blockchain developer on Upwork today!

Read more
View less
Blockchain developer Hiring Resources
Learn about cost factors Hire talent
Schedule a call

Looking to hire for long-term or full-time assignments? See how Full-time hiring on Upwork simplifies the process.