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4.7/5
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  4. (Current) Blockchain Developers
  • US$40 hourly

    • 5.0/5
    • (20 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.
    Featured Skill Blockchain
    Solidity
    PDF Conversion
    Django
    Scripting
    web3.js
    Smart Contract
    React
    HTML5
    Ethereum
    CSS
    jQuery
    JavaScript
    Python
    Data Extraction
  • US$50 hourly

    • 5.0/5
    • (18 jobs)
    Blockchain developer since 2020. - Smart Contracts writing and testing. - Descentralized Applications. - NFTs and Marketplaces. - Tokens. - Web3 integration. - APIs - Solidity - Web3, Ethers - Hardhat, Truffle, - JavaScript - React - NodeJs - Ethereum and EVM Blockchains. - ERC721, ERC1155, ERC20 Blockchain is evolving really fast, so I'm working, learning and improving everyday to stay up to date. If I don't know the answer to a problem, I will dive into the documentation and come back with a solution. Let's discuss your project and start working together.
    Featured Skill Blockchain
    Blockchain Development
    Blockchain Architecture
    React
    Twitter/X API
    API Integration
    Node.js
    TypeScript
    PostgreSQL
    Solana
    Discord Bot Development
    AI Agent Development
    AI Bot
    Next.js
    web3.js
    Solidity
    Smart Contract
    DApps
  • US$40 hourly

    • 5.0/5
    • (3 jobs)
    Hi, I am Sanjay, I am an experienced blockchain developer having 4+ years of expertise in designing, and coding end-to-end blockchain solutions. I have successfully delivered many defi, fungible, and nonfungible token-based projects. I can help in hands-on coding smart contracts as well as providing consultancy in all the steps of blockchain project execution. I have developed many smart contracts for various Blockchains like Ethereum, Polygon, Binance, Tron, Flow, Solana, etc. Worked on NFT projects by implementing ERC 1155, ERC 721 standards as well as developing Solana Anchor Smart Contracts, etc., and lastly have several open-source contributions to Stellar, Solana, and Substrate.
    Featured Skill Blockchain
    FinTech
    Ethereum
    Smart Contract
    React
    Node.js
    Stellar
    Solana
    NestJS
    Solidity
    TypeScript
    Python
    Rust
    Golang
  • US$40 hourly

    • 5.0/5
    • (52 jobs)
    With my extensive background as an experienced software engineer and blockchain developer, I possess in-depth knowledge and skills in designing, implementing, and overseeing intricate software applications. Having accumulated over 6 years of industry experience, I have cultivated a diverse proficiency in software development utilizing various programming languages, frameworks, and databases. In addition to my software development expertise, I possess a comprehensive understanding of effectively scaling solutions to meet client requirements. I am well-prepared to assist you in navigating the complex process of launching a successful web3 project, offering a refreshing alternative to the often unsatisfactory experiences encountered with inexperienced freelancers or under qualified developers. If you are seeking a dependable and seasoned professional to bring your vision to fruition, your search ends here. I maintain flexible pricing, which is subject to negotiation and depends on the project scope and timelines. My professional services include, but are not limited to, the following: Cryptocurrency & Blockchain Development: ✅Smart Contract Creation {​​​​​​​​​ Tokens | NFTs | DAOs | Flash Loan | Arbitrage | and more... }​​​​​​​​​ ✅NFT Marketplace Development ✅Smart Contract Auditing ✅Decentralized Applications (dApps) ✅EVMs {​​​​​​​​​ Solidity }​​​​​​​​​ ✅Parachains {​​​​​​​​​ Rust | Partisia | Luna | Substrate }​​​​​​​​​ ✅Web3.js Web Development: ✅HTML | CSS | JavaScript | PHP ✅Web3 JS | React JS | Angular | Typescript ✅Database {​​​​​​​​​ MySQL | PostgreSQL | MongoDB | and more... }​​​​​​​​​ Mobile App Development: ✅iOS {​​​​​​​​​ Swift | Objective-C }​​​​​​​​​ ✅Cross-Platform Compatibility ✅Flutter ✅React Native Other: ✅Dev Ops Support ✅ Bot Development ✅Technical & Whitepaper Creation ✅Tokenomics Consulting ✅Business Consulting I offer additional services beyond the ones mentioned above, so please feel free to inquire about specific requirements.
    Featured Skill Blockchain
    Web Application
    Front-End Development
    React
    Amazon Web Services
    Avalanche
    DApps
    Cryptocurrency
    Web3
    Node.js
    JavaScript
    Solidity
    Smart Contract
    Blockchain Development
  • US$21 hourly

    • 5.0/5
    • (12 jobs)
    As a Sr. blockchain Engineer with RUST/Solana & solidity programming skills, I have successfully delivered a wide range of custom cryptocurrency and blockchain development projects using the solidity & Ride language with eye-catching user-friendly UI design and high-end functionalities I have successfully developed Smart Contracts, Toekns, Dapps, Defi, DEX ,NFT Marketplace, and Innovative Utilities for Startups and their NFT collections on multiple Blockchains Platform i.e Ethereum, Polygon, Binance, Wave My Technical Blockchain Development Expertise: ⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷⟷ Being a full-stack blockchain developer, I have decent expertise in Blockchain development and smart contract Audit 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, Ride ✅ 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 Geolocation: 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 ✅ Defi ✅Liquidity pool ✅ Crowdsale ✅ EVM Based Blockchain ✅ Hyperledger & Multichain Development ✅ Multichain/Supply Chain Development ✅ Custom Cryptocurrency Development ✅ Crypto App Development ✅ ICO Web Development ✅ POC Development ✅ Custodial and Non-Custodial wallet Integration ✅ 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
    Featured Skill Blockchain
    Solidify
    Phaser
    Software Development
    NFT Marketplace
    Metaverse
    Web3
    Quantum Computing
    Blockchain Development
    Smart Contract
    web3.js
    Ethereum
    Blockchain Architecture
  • US$100 hourly

    • 5.0/5
    • (18 jobs)
    I've been building unique software solutions since 2020. I love building new projects from the ground up and contributing to existing projects that make a difference in the world. I believe in quality solutions, good communication, and test driven development. 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 𝗜 𝗖𝗮𝗻 𝗣𝗿𝗼𝘃𝗶𝗱𝗲 - 𝙎𝙢𝙖𝙧𝙩 𝘾𝙤𝙣𝙩𝙧𝙖𝙘𝙩𝙨: I can provide smart contracts for ERC20/ERC721 tokens, NFT Marketplaces, Physical Goods Marketplaces, and Databases that use a combination of Solidity and IPFS for a truly decentralized backend - 𝘾𝙧𝙮𝙥𝙩𝙤 𝙒𝙖𝙡𝙡𝙚𝙩𝙨: I can build crypto wallets that take a simple seed phrase and turn it into blockchain address with full payment functionality - 𝘽𝙡𝙤𝙘𝙠𝙘𝙝𝙖𝙞𝙣 𝙏𝙧𝙖𝙘𝙠𝙞𝙣𝙜 𝙖𝙣𝙙 𝘼𝙣𝙖𝙡𝙮𝙨𝙞𝙨: I love tracking addresses and parsing through blockchain history to provide real answers to complicated questions - 𝘼𝙪𝙩𝙤𝙢𝙖𝙩𝙚𝙙 𝘿𝙖𝙩𝙖 𝙍𝙚𝙥𝙤𝙧𝙩𝙞𝙣𝙜: I can build software that automatically takes your raw data and turns it into a human readable spreadsheet... I can even have a bot deliver your spreadsheet for you! - 𝙒𝙚𝙗 𝙎𝙘𝙧𝙖𝙥𝙞𝙣𝙜: Extract valuable data in an efficient manner - 𝙏𝙚𝙘𝙝𝙣𝙞𝙘𝙖𝙡 𝘼𝙧𝙩𝙞𝙘𝙡𝙚𝙨/𝘿𝙤𝙘𝙪𝙢𝙚𝙣𝙩𝙖𝙩𝙞𝙤𝙣: How-To Guides and Software Docs (with code examples) in pretty much any format you could ever want - 𝙏𝙧𝙖𝙙𝙞𝙣𝙜 𝘽𝙤𝙩𝙨: Turn your manual trading strategy into an automated powerhouse! - 𝙁𝙪𝙡𝙡 𝙎𝙩𝙖𝙘𝙠 𝙎𝙤𝙡𝙪𝙩𝙞𝙤𝙣𝙨: I can give your app a custom frontend using JavaScript/React, HTML and CSS - 𝘾𝙪𝙨𝙩𝙤𝙢 𝙎𝙤𝙡𝙪𝙩𝙞𝙤𝙣𝙨: Need something that's not listed above? Send me a message and we'll talk! 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 - 𝘾𝙪𝙨𝙩𝙤𝙢 𝙎𝙤𝙛𝙩𝙬𝙖𝙧𝙚: You have a unique problem and it requires a unique solution - 𝙌𝙪𝙖𝙡𝙞𝙩𝙮: You care about the quality of your project or product and you want things handled with proper time and care - 𝙏𝙚𝙨𝙩 𝘿𝙧𝙞𝙫𝙚𝙣 𝘿𝙚𝙫𝙚𝙡𝙤𝙥𝙢𝙚𝙣𝙩: You believe that software products should be properly planned and tested before hitting production - 𝙋𝙚𝙧𝙨𝙞𝙨𝙩𝙚𝙣𝙘𝙚: You want someone who attacks a problem from every angle and does not believe in the phrase, "It can't be done" 𝗠𝘆 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 - Python - Rust - JavaScript - Julia - C++ - Solidity Take a look at some of my reviews below to see what other clients have said!
    Featured Skill Blockchain
    Solidity
    Ethereum
    Bitcoin
    Data Extraction
    Julia
    Writing
    Content Creation
    Software Documentation
    JavaScript
    React
    C++
    HTTP
    Rust
    Python
  • US$150 hourly

    • 5.0/5
    • (288 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 the past seven years, I have worked as a freelancer, providing content development, course creation, and consulting 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.
    Featured Skill Blockchain
    Reverse Engineering
    Cryptocurrency
    Cryptography
    Information Security
  • US$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.
    Featured Skill Blockchain
    Solidity
    Smart Contract
    Web Scraping
    Node.js
    React
    Golang
    Vue.js
    GPT-3
    Rust
    Next.js
    GPT-4
    ChatGPT
    Web Development
    CSS
  • US$80 hourly

    • 5.0/5
    • (41 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).
    Featured Skill Blockchain
    Ethereum
    web3.js
    Solidity
    Blockchain, NFT & Cryptocurrency
    Smart Contract
    Blockchain Development
    Bitcoin
    Web3
    Network Architecture
    Blockchain Architecture
    Golang
    React
    JavaScript
  • US$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!
    Featured Skill Blockchain
    Node.js
    Blockchain Architecture
    React
    TRON
    API Development
    API Integration
    JavaScript
    Smart Contract
    Mobile App Development
    Blockchain Development
    AWS Application
    Desktop Application
  • US$35 hourly

    • 4.7/5
    • (34 jobs)
    I am a blockchain developer! I build applications that run on this revolutionary technology. Think secure, transparent systems for everything from finance to supply chains. I work with dApps, smart contracts, and the core workings of blockchain itself to create innovative solutions.
    Featured Skill Blockchain
    Blockchain Development
  • US$65 hourly

    • 4.6/5
    • (39 jobs)
    With over 8 years of experience in large-scale software design and development, I specialize in backend systems and have a proven track record in building software from the ground up and maintaining complex legacy projects. My work spans diverse domains such as messaging, audio/video streaming, ride-sharing, event-driven architectures, eCommerce, FinTech, EdTech, IoT, SaaS, and Blockchain. # Areas of Expertise: - API Design & Development: Proficient in designing and implementing REST, GraphQL, and gRPC APIs. - Scalable Systems: Expertise in designing and developing horizontally scalable and highly available systems. - Automation: Skilled in automating development workflows and deployment pipelines. - Microservices Architecture: Strong experience in leveraging microservices for system design. - RTC/WebRTC: Proficient in building real-time communication applications. - Blockchain/DApps: Experienced in designing decentralized applications (DApps) and smart contracts. - Monitoring & Logging: Expertise in log aggregation and system monitoring. # Skills & Technologies: - Languages: Golang, Java - APIs: RESTful, gRPC, GraphQL - Frameworks: Fiber, Echo, Spring Boot - Databases: PostgreSQL, Redis, MongoDB, ElasticSearch - Messaging & Orchestration: Apache Kafka, RabbitMQ, Apache Airflow - Containers & Orchestration: Kubernetes, Docker - Protocols: MQTT, XMPP, WebRTC - Blockchain: Ethereum, smart contracts - Web Servers: Nginx, HAProxy, Apache - Cloud Platforms: DigitalOcean, AWS, Azure - Operating Systems: Linux, macOS - DevOps: CI/CD, build automation I am deeply passionate about developing highly scalable distributed systems and take pride in crafting robust, efficient, and innovative solutions.
    Featured Skill Blockchain
    API
    Solidity
    Software Architecture & Design
    Distributed Computing
    Docker
    MQTT
    Golang
    Kubernetes
    Ethereum
    Java
    PostgreSQL
    GraphQL
    RESTful API
  • US$20 hourly

    • 5.0/5
    • (24 jobs)
    I have worked on 25+ NFT projects and smart contract audits. I can generate an 2D, 3D, gif and interactive NFT collection with metadata. I can develop dapp using React for NFT projects. Expert in customized, low gas fee smart contracts. Proficient in Merkle Tree based off-chain whitelisting, which will save thousands of dollars.
    Featured Skill Blockchain
    Front-End Development
    Three.js
    Full-Stack Development
    Blockchain, NFT & Cryptocurrency
    NFT Collection Generation
    React
    NFT Marketplace
    Blockchain Development
    Ethereum
    Smart Contract
    Solidity
    NFT
    web3.js
  • US$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
    Featured Skill Blockchain
    React Native
    Database
    Solidity
    Smart Contract
    Creative Writing
    DApps
    Solidify
    Front-End Development
    React
    HTML5
    MySQL
    Node.js
  • US$30 hourly

    • 5.0/5
    • (49 jobs)
    I am a highly skilled **Blockchain Developer** specializing in **Solidity, C++, and Web3 technologies**. I have extensive experience in **Ethereum and Solana blockchain development**, building secure and efficient **smart contracts** for DeFi, NFTs, DAOs, and various DApps. Beyond blockchain, I also bring **graphic design and UI/UX expertise**, ensuring intuitive and engaging user experiences for **decentralized applications**. ### **My Expertise:** ✅ **Smart Contract Development (Solidity, C++, Rust for Solana)** ✅ **Ethereum & Solana Blockchain Development** ✅ **DApp Development & Web3 Integration** ✅ **UI/UX & Graphic Design for Web3 Platforms** ✅ **Problem-Solving & Decision-Making** ✅ **Excellent Communication & Client Satisfaction** With a Bachelor’s in Computer Science from Government College University, I am committed to delivering **top-tier blockchain solutions** tailored to client needs. Let’s build innovative and decentralized technology together! 🚀
    Featured Skill Blockchain
    DApps
    C++
    Smart Contract
    NFT Metadata
    Solidity
    Blockchain Development
  • US$40 hourly

    • 4.5/5
    • (53 jobs)
    Hello, "28 Successful Jobs related to data engineering" Why should you hire me ? ✅ 750+ Upwork Hours Completed ✅ 100% Customer Satisfaction Some Reviews: 💡 A simple python transcript for traffic profiling "Hands down, Muzammil is the best Python programmer I’ve worked with so far. He’s extremely professional, smart, dedicated and easy to work with. He came in ahead of schedule and under budget with well organized and well-documented code. Not just that, I came up with some last-minute amendments in design and Muzammil willingly did all, making sure that I’m satisfied with the final deliverable. Simply outstanding! Will definitely have him for my upcoming projects. Thank you Muzammil!" 💡Python Interface to Binance Smart Chain Exchanges "Muzammil has been great to work with on a variety of blockchain and programming tasks and projects we have set him over the last 12 months. He has maintained a high level of professionality and has managed to successfully tackle all of the problems we have had him working on so far. Has proven to be a real asset to our business." - FTMC Co. I can create automation tools and bots in Python to give you a comprehensive solution for scraping websites, ingesting data and database integration. Furthermore I also have experience with setting up a Bitcoin/BSC/Ethereum Node and writing robust code in Solidity for smart contracts. Services I provide as an Data engineer: ⦁ Data Cleansing using Python ⦁ Data Wrangling with Pandas and Numpy ⦁ Data Extraction with python requests from API calls ⦁ Web Scraping with BeautifulSoup and Scrapy ⦁ Data Manipulation (Excel, XML, CSV, JSON, YAML, image files) ⦁ Design/Development/Management of ETL/ELT solutions ⦁ Familiarity with Microsoft Azure based Data Warehousing (Azure SQL, Azure Synapse Analytics, and Azure CosmosDB). ⦁ Familiarity with Microsoft Azure based ETL tools (Azure Data Factory, Azure Stream Analytics, and Azure Databricks) ⦁ Familiarity with Amazon Web Services (AWS EC2, AWS Lambda, AWS DynamoDB, AWS Redshift, AWS EMR Clusters, and AWS EKS) ⦁ Integration of Apache Kafka for smooth streaming ⦁ SQL Databases (MySQL, Postgresql, and MSSQL) ⦁ NoSQL Databases (MongoDB, and GraphQL) ⦁ Familiarity with SQL Server Management Studio (SSMS) ⦁ Designing Data Warehouse based on Star Schema and Snowflake Schema Orchestration Services I provide: ⦁ Apache Airflow ⦁ Orchestration with Docker compose ⦁ Building pipeline in Jenkins Data Visualization Service I provide: ⦁ PowerBI Automation and Backend Services I provide: ⦁ Automation testing using selenium ⦁ Django Backend ⦁ Creating RESTFUL APIs with FastAPI AI Services I provide: ⦁ Integration of OpenAI's gpt 4 and gpt 4 turbo ⦁ Integration of Google Bard ⦁ Implementing ML models ⦁ Integration other LLM's in your application Blockchain Services I provide: ⦁ Blockchain Development (Ethereum, Binance Smart Chain, Solana, Xinfin, Avalanche, Polygon) ⦁ Blockchain Consultancy ⦁ Dapps Development (Liquidity contract, Yield farming, NFT marketplace, Verification contract) ⦁ Smart Contracts (Solidity) ⦁ Setting up a Node (Bitcoin/BSC/Ethereum/Solana) ⦁ Full-Stack Blockchain Development ⦁ Integration of Dapp with Reactjs
    Featured Skill Blockchain
    Microsoft Azure
    Smart Contract
    Data Cleaning
    Automation
    web3.js
    Solidity
    Solana
    API
    Blockchain, NFT & Cryptocurrency
    Data Scraping
    Python
    API Integration
    ETL Pipeline
  • US$70 hourly

    • 5.0/5
    • (29 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!
    Featured Skill Blockchain
    Web3
    Cryptocurrency
    PayPal Integration
    Solidity
    Smart Contract
    Google APIs
    WordPress
    CSS 3
    Vue.js
    Laravel
    jQuery
    PHP
    Python
    Shopify
  • US$85 hourly

    • 5.0/5
    • (7 jobs)
    Full stack dev. Web3 friendly. Front-end - NextJS/Tailwind/GraphQL MERN - Mongo/Express/React/Node Web3 - Solidity/Viem/The Graph/Wagmi
    Featured Skill Blockchain
    Front-End Development
    GraphQL
    Tailwind CSS
    Next.js
    React
    React Native
    Web Development
    Web3
    Solidity
    web3.js
    Smart Contract
    Ethereum
    TypeScript
    JavaScript
  • US$35 hourly

    • 4.7/5
    • (35 jobs)
    Hi there, I have developed and deployed software solutions for various problems in different domains. If you are looking for transparent and reliable work, don't hesitate to contact me. Blockchain is one of the emerging technologies. Using my experience in blockchain, I can assure you high quality solutions.
    Featured Skill Blockchain
    API Development
    MongoDB
    Wax
    Blockchain, NFT & Cryptocurrency
    Blockchain Architecture
    Node.js
    Solidity
    JavaScript
    NFT
    Smart Contract
    EOS
    Web3
    Metaverse
  • US$80 hourly

    • 5.0/5
    • (30 jobs)
    Full Stack Javascript Developer Constantly expanding tech stack: JavaScript (Node.js, React.js, Vue.js, Angular.js, ..) HTML5, CSS3, Infra: Amazon Web Services AWS, GCP, Docker, Docker-compose, Kubernetes, Vagrant, GIT, Webpack DBs: Mongo, Redis, Postgres, MySQL, OrientDB, SQlite, etc. Playing with Rust lang. Less interest but still in stack Ruby (Rails, Sinatra, ..), JRuby (Vertx.io, Rails), Java, Python, ML, PHP, Racket. Fast learner of any new areas and technologies, always open for professional growth.
    Featured Skill Blockchain
    Azure OpenAI Service
    Web3
    AWS Elemental MediaConvert
    Live Streaming Setup
    Agile Software Development
    NestJS
    React
    Node.js
    JavaScript
    ChatGPT
    Vue.js
    ExpressJS
    Sass
    TypeScript
  • US$40 hourly

    • 4.7/5
    • (22 jobs)
    I am a full Stack/ Blockchain developer who holds a Master's degree in Mechatronics Engineering. - Front-end web development - React - Gatsby (all CMS) - Nextjs - Api Integration - Redux - Storybook - Testing - Netlify - Back-end web development - AWS - Document Databases - Graph Databases - SQL Databases - Serverless Architecture - APIs (GraphQl & Rest) - Event-Driven Architecture - Microservices - Block-chain Development - Solidity - Hardhat - Truffle - Remix - Ethereum - Polygon - Binance Smart Chain - DAO - NFTs (ERC 115 & ERC 721) - tokens (ERC20) - NFT Marketplace - DApps - Metmask Integration - Web3/Ether client side library - Dex - IDO - Upgradable Smart Contracts
    Featured Skill Blockchain
    Smart Contract
    Serverless Computing
    Solidity
    AWS Lambda
    React
    Blockchain Architecture
    TypeScript
    Ethereum
    AWS AppSync
    Blockchain Development
    Amazon Web Services
    JavaScript
    Cryptocurrency
  • US$10 hourly

    • 5.0/5
    • (103 jobs)
    🚀 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 | 𝗠𝗘𝗥𝗡, 𝗠𝗘𝗔𝗡, 𝗠𝗘𝗩𝗡 | 𝗥𝗲𝗮𝗰𝘁, 𝗔𝗻𝗴𝘂𝗹𝗮𝗿, 𝗡𝗲𝘅𝘁.𝗷𝘀, 𝗡𝗼𝗱𝗲.𝗷𝘀, 𝗟𝗮𝗿𝗮𝘃𝗲𝗹, 𝗣𝘆𝘁𝗵𝗼𝗻, 𝗚𝗼𝗹𝗮𝗻𝗴, 𝗣𝗛𝗣 𝗕𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗦𝗰𝗮𝗹𝗮𝗯𝗹𝗲, 𝗛𝗶𝗴𝗵-𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 Are you looking for a 𝙨𝙠𝙞𝙡𝙡𝙚𝙙, 𝙧𝙚𝙡𝙞𝙖𝙗𝙡𝙚, 𝙖𝙣𝙙 𝙧𝙚𝙨𝙪𝙡𝙩𝙨-𝙙𝙧𝙞𝙫𝙚𝙣 full-stack developer to bring your vision to life? With expertise in modern frameworks and backend technologies, I deliver 𝙧𝙤𝙗𝙪𝙨𝙩, 𝙨𝙘𝙖𝙡𝙖𝙗𝙡𝙚, 𝙖𝙣𝙙 𝙝𝙞𝙜𝙝-𝙥𝙚𝙧𝙛𝙤𝙧𝙢𝙞𝙣𝙜 applications tailored to your needs. I specialize in: ✔ 𝙀𝙣𝙙-𝙩𝙤-𝙀𝙣𝙙 𝘿𝙚𝙫𝙚𝙡𝙤𝙥𝙢𝙚𝙣𝙩 – From concept to deployment, ensuring quality and efficiency. ✔ 𝙎𝙚𝙖𝙢𝙡𝙚𝙨𝙨 𝙄𝙣𝙩𝙚𝙜𝙧𝙖𝙩𝙞𝙤𝙣 – Quickly adapting to existing codebases and delivering enhancements, fixes, and new features. ✔ 𝙊𝙥𝙩𝙞𝙢𝙞𝙯𝙚𝙙, 𝙈𝙖𝙞𝙣𝙩𝙖𝙞𝙣𝙖𝙗𝙡𝙚 𝘾𝙤𝙙𝙚 – Writing clean, structured code for long-term sustainability. ✔ 𝙋𝙚𝙧𝙛𝙤𝙧𝙢𝙖𝙣𝙘𝙚 & 𝙎𝙘𝙖𝙡𝙖𝙗𝙞𝙡𝙞𝙩𝙮 – Ensuring fast, secure, and efficient applications. ✔ 𝘾𝙡𝙚𝙖𝙧 𝘾𝙤𝙢𝙢𝙪𝙣𝙞𝙘𝙖𝙩𝙞𝙤𝙣 & 𝙍𝙚𝙡𝙞𝙖𝙗𝙞𝙡𝙞𝙩𝙮 – Keeping you informed every step of the way. 🔥𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 & 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗙𝗿𝗼𝗻𝘁𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 ✔ React.js, Next.js, Angular, Vue.js ✔ TypeScript, JavaScript (ES6+), Redux, Tailwind CSS ✔ UI/UX Optimization, Responsive Design 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: ✔ Node.js (Express.js, NestJS) ✔ Python (Django, FastAPI), ✔ Golang (Gin, Beego, Goa, Echo) ✔ PHP (Laravel, CodeIgniter), RESTful APIs, GraphQL ✔ PostgreSQL, MySQL, MongoDB, AWS DynamoDB, Firebase 𝗗𝗲𝘃𝗢𝗽𝘀 & 𝗖𝗹𝗼𝘂𝗱 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: ✔ AWS (EC2, S3, Lambda), Docker, Kubernetes ✔ CI/CD Pipelines, GitHub Actions, Firebase Hosting 𝗪𝗼𝗿𝗸𝗳𝗹𝗼𝘄 & 𝗧𝗼𝗼𝗹𝘀: ✔ Agile & Scrum | Jira | GitHub | Slack 🏆𝗟𝗲𝘁’𝘀 𝗕𝘂𝗶𝗹𝗱 𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝗚𝗿𝗲𝗮𝘁 𝗧𝗼𝗴𝗲𝘁𝗵𝗲𝗿! Whether you need a 𝙛𝙪𝙡𝙡-𝙨𝙩𝙖𝙘𝙠 𝙚𝙭𝙥𝙚𝙧𝙩 𝙩𝙤 𝙗𝙪𝙞𝙡𝙙, 𝙚𝙣𝙝𝙖𝙣𝙘𝙚, 𝙤𝙧 𝙤𝙥𝙩𝙞𝙢𝙞𝙯𝙚 your application, I’m here to help. Let's create something 𝙞𝙣𝙣𝙤𝙫𝙖𝙩𝙞𝙫𝙚, 𝙨𝙘𝙖𝙡𝙖𝙗𝙡𝙚, 𝙖𝙣𝙙 𝙞𝙢𝙥𝙖𝙘𝙩𝙛𝙪𝙡. 📩 𝗚𝗲𝘁 𝗶𝗻 𝘁𝗼𝘂𝗰𝗵, 𝗮𝗻𝗱 𝗹𝗲𝘁’𝘀 𝗯𝗿𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝘁𝗼 𝗹𝗶𝗳𝗲!
    Featured Skill Blockchain
    JavaScript
    TypeScript
    Next.js
    Web Application
    Functional Testing
    Software QA
    Android App Development
    Web Development
    Virtual Assistance
    Administrative Support
    Smart Contract
    App Development
    Data Entry
    Cryptocurrency
  • US$40 hourly

    • 4.9/5
    • (111 jobs)
    Hello, I’m Suleman Muhammad, a versatile Full-Stack Developer and Blockchain Expert with over six years of experience creating and auditing Smart contract and developing modern, responsive web and mobile applications. My journey in tech includes the successful completion of over 100 Dapps over 20 Mobile apps, over 50 wordpress and php websites, as well as projects across a variety of stacks, bringing innovative solutions to life through a holistic approach to technology. With a deep knowledge of major blockchain platforms, I deliver secure, scalable, and efficient blockchain solutions. My expertise spans platforms such as Binance Smart Chain, Ethereum, Tron, Solana, KuCoin, and Polygon (Matic). I specialize in Smart Contract development and audits, Crypto Payment Gateway integration, Tokenization, DeFi, DEX, and CEX projects. Through these areas, I’ve built robust cryptocurrency solutions, digital wallets, and secure blockchain infrastructures that meet the highest industry standards. As a full-stack developer, my skills extend well beyond blockchain to encompass a range of modern technologies. I am proficient in frontend and backend development, utilizing JavaScript, React.js, Node.js, MongoDB, and Express.js. Additionally, I specialize in mobile development with Flutter, creating cross-platform applications that ensure smooth user experiences. My expertise also includes web development using WordPress and PHP Laravel, allowing me to build custom, scalable websites and platforms. For blockchain-specific tasks, I leverage Solidity and IPFS to develop decentralized data storage solutions. I offer a wide array of services tailored to both Blockchain startups and established companies. My capabilities include Dapp and web development, where I build and deploy cross-platform applications that align with business needs. I also provide thorough Smart Contract audits to ensure security and reliability. My full-stack solutions utilize technologies such as MERN, PHP Laravel, and WordPress to create modern, responsive web applications. Furthermore, I offer consulting services that provide strategic insights into leveraging blockchain technology for a competitive advantage. As a dedicated learner and tech enthusiast, I am committed to staying ahead of industry trends. My client-centered approach prioritizes understanding your unique needs and delivering solutions that propel your business forward. I value collaboration and communication, ensuring that each project is a shared journey towards success. With extensive experience across diverse tech stacks, I bring a well-rounded skill set to each project. Whether you need blockchain expertise, full-stack development, or tailored mobile and web solutions, I’m dedicated to delivering high-quality results that reflect excellence and innovation in every aspect. Let’s work together to bring your vision to life!
    Featured Skill Blockchain
    Smart Contract Development
    Full-Stack Development
    Blockchain, NFT & Cryptocurrency
    DApps
    JavaScript
    Ethereum
    Cryptocurrency
    Blockchain Development
    Smart Contract
    Node.js
    Initial Coin Offering
    Blockchain Architecture
    Solidity
    web3.js
  • US$50 hourly

    • 4.9/5
    • (48 jobs)
    ⭐ 10 years of practical experience in Web3/Blockchain projects development. ⭐ Worked as a Sr. Solution Architect and CTO on many Web3/Blockchain projects. ⭐ Experience architecting solutions and proofs-of-concept for new processes and integrations. ✅ 𝐓𝐎𝐏 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 1. 𝐒𝐞𝐞𝐝𝐢𝐟𝐲 (IDOs and Token Launches | Incubation | Staking and Rewards) 2. 𝐁𝐞𝐭𝐚𝐜𝐚𝐫𝐛𝐨𝐧 (backed by Australian Govt.) platform focused on CARBON CREDIT TRADING and the broader carbon offset industry. 3. 𝐔𝐧𝐢𝐢𝐞𝐪 (OIL & GAS INDUSTRY | Backed by SHELL) Blockchain-based equipment master data catalogue ...filling the gap with missing metadata for major industry components. ... and many more 𝐖𝐡𝐲 𝐦𝐞? ✅ 𝐂𝐥𝐢𝐞𝐧𝐭 𝐑𝐞𝐯𝐢𝐞𝐰𝐬 You can check the positive feedback from previous clients, which reflects professionalism, reliability, and quality of my work. ✅ 𝐏𝐫𝐨𝐣𝐞𝐜𝐭 𝐃𝐞𝐦𝐨𝐬 I can showcase project demos to demonstrate my expertise and the quality of my work. I am accountable and reliable, ⭐ Upwork Verified Let’s schedule a call to discuss your project details. Sincerely, Iqbal Singh
    Featured Skill Blockchain
    Ethers.js
    Smart Contract Development
    Hardhat
    Truffle
    Utility Token
    Crypto Wallet Development
    Launchpad
    Blockchain, NFT & Cryptocurrency
    Chatbot Development
    web3.js
    Solidity
    Ethereum
    NFT Marketplace
    DeFi
    DApp Development
  • US$30 hourly

    • 5.0/5
    • (82 jobs)
    I am a courteous and enthusiastic Full Stack Blockchain Developer from Bangalore, India. Some of the skills I use now on Blockchain: expertise in solidity Ethereum | Solidity | Solana | Rust Token creation | NFT mint | NFT Marketplace | Auctions | Defi | Staking | ICO/IDO | Payment Protocol | Exchanges | and many more… Building cryptocurrencies, NFT staking, minting and marketplace dapps, defi dapps, decentralized exchange, decentralized donation platform, and much more. I have strong knowledge of solidity, and I keep myself up to date with the latest trends in the defi and NFT space. I am a MERN Stack developer. I build a web app using MongoDB, Express, React, and Node. I've been a web developer since 2018. I specialized in Blockchain Development and front-end and back-end application development. Here I am working as a single freelancer. Some of the skills I use now on the front-end: ➳ Language: JavaScript (ES5/ES6, Babel), HTML5, CSS3 with SCSS, …; ➳ Frameworks: ReactJS(Gatsby/NextJS), Redux; ➳ UI CSS Frameworks: Tailwind, React Suite, Material UI, Bootstrap, ...; ➳ Tests: Jest, TDD, enzyme, … ➳ Cloud: AWS, Firebase ➳ Design: Object-Oriented UI/UX Design, responsive web, … ➳ Others: Axios, AJAX, Webpack, npm, yarn, … Some of the skills I use now on the back-end: ➳ Language: Nodejs, Express, Socket.io, Javascript ➳ Database: MongoDB, SQL, AWS, Firebase Project Types: ✔ Online Shops / eCommerce ✔ API / Custom Libraries ✔ Highload Systems ✔ Custom CMS / CRM / Frameworks ✔ Online Gambling ✔ Websites more........ It is important for me to build a relationship with the client, so I am primarily looking for projects. I am ready to discuss requirements and communicate with your team via video chat.
    Featured Skill Blockchain
    Cryptocurrency Forking
    Solidity
    NFT Marketplace
    Initial Coin Offering
    NFT
    Redux
    Firebase
    Ethereum
    Smart Contract
    Layer 2 Blockchain
    React
    AWS Application
    Sass
    JavaScript
  • US$75 hourly

    • 4.6/5
    • (39 jobs)
    As a highly skilled and experienced blockchain developer with a bachelor's degree in Computer Science and a strong background in IT, I have extensive experience working on a variety of projects involving the development and implementation of smart contracts, the creation of decentralized applications (DApps), and the development of non-fungible tokens (NFTs). My technical expertise includes programming languages such as Solidity and ReactJS, as well as a deep understanding of the technical aspects of blockchain technology. I have a proven track record of delivering high-quality work to my clients, and am known for my reliability and dedication to my projects. In addition to my experience in blockchain development, I am also proficient in front-end web development using the React framework. I have a strong understanding of the principles of user experience and interface design, and am able to create intuitive and visually appealing applications. If you are in need of a talented and experienced blockchain developer who can bring your project to life, I would be happy to help. I am confident in my ability to deliver exceptional results and exceed your expectations.
    Featured Skill Blockchain
    Ethereum
    Initial Coin Offering
    Solidity
    Custom PHP
    DApps
    Blockchain Development
    Blockchain Architecture
    React Native
    Node.js
    WordPress
    Website Security
    Ruby on Rails
    PHP
    Golang
  • US$25 hourly

    • 5.0/5
    • (10 jobs)
    I'm a Full Stack JavaScript Engineer with over 5 years of experience building and maintaining scalable enterprise software solutions. I specialize in building scalable architectures, optimizing both front-end and back-end systems, and solving challenging technical problems to help businesses grow. I have experience working with companies like Playnance, Franck Muller, Hiive Solution, Rembrandt, and Google, among others, scaling systems to support over 100,000 users while ensuring top-notch performance. I can help you with every aspect of the JavaScript technology stack by: - Creating user-friendly, robust applications that grow alongside your business. - Seamlessly integrating tools and services to streamline workflows. - Optimizing performance, scalability, and reliability for the best user experience. - Providing proactive project management and effective communication for smooth collaboration. I have worked across industries like: 🔗 Web3, 💰 Finance, 🚚 Transport and Logistics, 🤖 Automation, 🎓 Education Specialization Skills Include: • Front-End: ReactJS, NextJS, React Native, Expo ⚛️ • Back-End: NodeJS, ExpressJS, Redis, Prometheus, Grafana 🌐 • Project Management: Trello, Slack, Jira, Upbase 💼 • Web Services: AWS, Heroku, Digital Ocean, AWS S3, AWS EC2, Vercel 💻 • Databases: PostgreSQL, MongoDB, Firebase 📈📊 • Real-Time Communication: Socket.io 🕒 • Authentication: Auth0, JWT, Passport 🔐 • Payment Gateways: Stripe, PayPal, Paddle 💳 • Social Integrations: Google, GitHub, Twitter 🌐 • Location Services: Mapbox API, Leaflet 🗺️ • Blockchain: Web3.js, ethers.js, Solana, Anchor framework 🔗 • DevOps Tools: Docker, Git, GitHub Actions ⚙️ • Testing: Jest, Cypress, React Testing Library 🧪 • API Design: RESTful APIs 🌐 • Performance Optimization: Application tuning, scalable architectures ⚡ Keywords 🔑: React.js, Next.js, React Native, Expo, Tailwind CSS, MUI, Framer Motion, Leaflet.js, Redux, Recoil, Node.js, Express.js, Sequelize, Firebase, RESTful APIs, Web3 integration, ethers.js, Solana, JWT, Socket.io, PostgreSQL, MongoDB, Redis, Docker, Kubernetes, Git, Jenkins, Nginx, AWS Lambda, Serverless, Prometheus, Grafana.
    Featured Skill Blockchain
    Firebase
    ExpressJS
    Tailwind CSS
    React Native
    Next.js
    React
    API Integration
    Node.js
    CSS
    JavaScript
    API Development
    App Development
    Web Development
    Web Application
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How to Hire Top Blockchain Developers for Your Needs

Brands are constantly evolving. To stay ahead in the digital age, they need a robust, secure, and innovative blockchain foundation. Enter blockchain developers—the masterminds who build and maintain these decentralized systems, ensuring your brand stays on the cutting edge of technology. Just as Canva designers use their tool to create eye-catching graphics, blockchain developers utilize various programming languages, frameworks, and platforms to develop, test, and deploy blockchain applications tailored to your business needs. 

When hiring a blockchain developer, it’s crucial to find someone who not only understands the technical aspects but also aligns with your project’s vision. Developers bring their own unique skill sets, such as expertise in Ethereum, Hyperledger, or smart contract development. Finding and hiring the best blockchain developer starts with understanding the role, evaluating the market demand and your budget, and crafting a well-thought-out job posting that attracts top talent. This guide will help you navigate the process of hiring the right blockchain developer to bring your brand’s innovative ideas to life.

Writing a blockchain developer job posting

Attracting the ideal blockchain developer starts with crafting a job post that speaks directly to their skills and interests. When creating your blockchain developer job posting, it’s essential to specify the type of projects and blockchain solutions you need and clearly outline the expertise and experience you’re seeking in a developer.

The following outline will help you create a job posting that covers all the necessary details:

Job post title

Effective job posts are clear and concise. Your blockchain developer job post title should immediately convey what you’re looking for. Consider these examples:

  • Blockchain developer (Ethereum specialist). Searching for a developer to create and deploy smart contracts on the Ethereum network for our decentralized finance (DeFi) platform.
  • Hyperledger developer. Hiring an expert in Hyperledger to design and implement a private blockchain network for our enterprise-level supply chain management system.
  • Blockchain security engineer. Need a developer with a strong background in cryptography to audit and enhance the security of our blockchain applications.
  • Smart contract developer. Seeking a developer experienced in Solidity to create and maintain smart contracts for our tokenized ecosystem.
  • Blockchain consultant. Looking for a blockchain expert to advise on integrating blockchain technology into our existing infrastructure and guide our transition to a decentralized system.

Project description

When writing your blockchain developer job post, be sure to include the following key elements:

  • Scope of work. Clearly outline the project’s objectives and specific deliverables. This might include developing smart contracts, creating decentralized applications (dApps), or building a private blockchain network. Be specific about the tasks and technologies involved, whether it’s working with Ethereum, Hyperledger, or another blockchain platform.
  • Project length. Estimate the project’s duration, including the expected number of hours or deliverables. Specify whether the project is a one-time task or if you’ll require ongoing support for maintenance, updates, or scaling.
  • Background. Indicate if you’re seeking candidates with particular backgrounds or specializations, such as experience in DeFi (decentralized finance), NFT development, or blockchain security.
  • Budget. Provide a budget range and indicate whether you prefer an hourly rate or a fixed-price contract. Make sure the budget aligns with the complexity and demands of the project.

Blockchain developer responsibilities

Include the core responsibilities for the blockchain developer role or project. Here are some examples:

  • Smart contract development. Write, test, and deploy smart contracts using Solidity or other relevant languages on platforms like Ethereum.
  • Blockchain architecture design. Design and implement blockchain architecture tailored to the specific needs of your project, whether it’s public, private, or consortium-based.
  • Security audits. Conduct thorough security audits of smart contracts and blockchain applications to identify vulnerabilities and ensure the integrity of the system.
  • Integration. Integrate blockchain solutions with existing applications or third-party services, ensuring smooth and efficient interoperability.
  • Decentralized application development. Build and deploy decentralized applications (dApps) that run on blockchain technology, ensuring a user-friendly experience.

Blockchain developer skills and qualifications

Let candidates know if you’re looking for specific skills or qualifications, such as:

  • Blockchain expertise. Proficiency in blockchain platforms like Ethereum, Hyperledger, or Binance Smart Chain, with demonstrated professional experience.
  • Smart contract development. Advanced skills in programming languages such as Solidity, Rust, or Vyper, with a strong portfolio of deployed contracts.
  • Cryptography knowledge. Deep understanding of cryptographic principles, including public-key cryptography, encryption algorithms, and hashing functions.
  • Project management. Ability to manage multiple blockchain projects simultaneously, coordinating with other team members, including front-end developers, QA testers, and project managers.
  • Security focus. Expertise in blockchain security practices, including threat modeling, secure coding, and incident response.
  • Experience with DeFI or NFTs. Familiarity with developing decentralized finance (DeFi) applications or non-fungible tokens (NFTs), including understanding token standards like ERC-20, ERC-721, and ERC-1155.

For even more detailed information on crafting the perfect job description, Upwork’s job description templates can help.

What to know before hiring a blockchain developer

Whether you’re new to blockchain or looking to expand your current capabilities, knowing what to expect can help you make informed decisions when hiring a blockchain developer. From understanding the basics of blockchain technology to budgeting and identifying the solutions a skilled developer can offer, this section will guide you through the crucial factors to consider and understand before hiring a blockchain developer. 

What is blockchain development?

Blockchain development refers to the process of creating and implementing blockchain technology, a decentralized and distributed digital ledger that records transactions across many computers in a way that ensures security, transparency, and immutability. Unlike traditional databases, blockchain operates without a central authority, making it a powerful tool for industries ranging from finance to supply chain management.

In simple terms, blockchain development involves building applications that run on this decentralized network, such as smart contracts, cryptocurrencies, or decentralized applications (dApps). Whether you’re looking to create a secure payment system, track assets, or develop a new token, blockchain developers are the experts who bring these innovations to life. Their work is at the forefront of the tech revolution, helping to shape the future of how we conduct business and manage information.

Average cost to hire a blockchain developer in 2024

When budgeting for a blockchain developer, you’ll want to consider the range of costs associated with different levels of experience. While the final cost will depend on various factors such as the developer’s expertise, location, and current market demands, here’s a general breakdown of what you can expect to pay per hour on Upwork:

  • Beginner. Under $20 per hour
  • Intermediate. Between $30 and $60 per hour
  • Expert. Up to $210 per hour

Keep in mind that highly specialized skills or developers in high-demand regions may command higher rates. Balancing your budget with the level of expertise required for your project is key to finding the right developer for your needs.

Key tools and technologies used by blockchain developers

Blockchain developers rely on a variety of tools and technologies to build secure and efficient applications. These tools help them write, test, and deploy code, as well as manage the underlying blockchain infrastructure. Here are some of the key tools and technologies they use:

  • Solidity. A programming language specifically designed for writing smart contracts on the Ethereum blockchain.
  • Hyperledger Fabric. An open-source framework for building enterprise-grade blockchain applications.
  • Truffle Suite. A development environment, testing framework, and asset pipeline for Ethereum, making it easier to develop and deploy smart contracts.
  • Ganache. A personal blockchain for Ethereum development that developers use to test and deploy smart contracts in a controlled environment.
  • Remix IDE. An online Integrated Development Environment (IDE) used for writing, testing, and debugging Solidity smart contracts.
  • Metamask. A browser extension that acts as a wallet and gateway to blockchain apps, allowing developers to interact with the Ethereum network.
  • Infura. A service that provides scalable access to Ethereum and IPFS, allowing developers to connect their applications to the blockchain without needing to run their own nodes.

Business solutions blockchain developers offer

Blockchain developers offer a wide range of business solutions that leverage the power of decentralized technology to improve efficiency, security, and transparency. These solutions can be tailored to meet the unique needs of various industries. Here are some of the key business solutions they provide:

Smart contract development

Blockchain developers can automate and secure business processes through self-executing contracts that automatically enforce the terms of an agreement, reducing the need for intermediaries and minimizing the risk of human error.

Cryptocurrency integration

Developers enable businesses to accept, manage, and transact with digital currencies, facilitating secure and borderless payments that can enhance global trade and customer convenience.

Supply chain management

Blockchain technology improves traceability and transparency across supply chains, allowing businesses to track products from their origin to the final destination, thus ensuring product authenticity and reducing fraud.

Decentralized applications (dApps)

Blockchain uses decentralized apps running on peer-to-peer (P2P) networks instead of a single computer to safeguard user privacy and increase developer flexibility. These dApps often use the Ethereum platform. 

Tokenization of assets

Blockchain developers convert physical or digital assets into tokens that can be traded on blockchain platforms, opening new avenues for investment, ownership, and liquidity in various markets.

Blockchain security solutions

By leveraging blockchain’s immutable ledger, developers enhance cybersecurity, protecting sensitive data and transactions from unauthorized access and tampering.

Identity management

Developers create secure, decentralized identity systems that give users control over their personal information, reducing the risk of identity theft and improving the security of online interactions.

Hire your next blockchain developer on Upwork

Leveraging cutting-edge blockchain technology is key to driving innovation and securing your brand’s future in the digital landscape. Whether you need a robust smart contract to streamline business operations or a decentralized application (dApp) to engage your users, partnering with top blockchain developers can ensure your projects are executed flawlessly and on time.

By understanding the intricacies of the role—from the specific responsibilities to typical projects and associated costs—you can kickstart your Upwork search with confidence when hiring a blockchain developer. Sign up for Upwork today and turn your vision into reality—get the secure, scalable solutions you need to stay ahead of the curve, whenever you need them. 

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