Hire an Expert Blockchain Developer now

BlockchainDevs is the #1 Marketplace for Freelance Web3 Developers.


Showing 437 developers. Reset filters

Developer's avatar
  • Nigeria
  • 5 years+ experience

With proper incentives, i can be self-motivated, disciplined and professional as a software engineer

Hi there! I'm a smart contract developer with 2 years of professional experience based in Lagos, Nigeria. Previously I've worked as a Blockchain developer at Solarsoft Technologies. I'm proficient in Solidity and have significant experience using Hardhat. I've worked on various Blockchain projects IN MY SPARE TIME and PROFESSIONALLY. For example I created a SMART CONTRACT WHICH HANDLES TOKEN TRANSFERS. I'm currently looking for a PART TIME / FULL TIME / FREELANCER as a Blockchain Developer/ Smart Contract Developer. If you're interested in working together, please contact me.

Developer's avatar
  • Canada
  • 5 years+ experience

Blockchain/Full stack developer

After obtaining my Bachelor's degree in Computer Science, I began my employment and have a decade of professional experience in the field. In my current position at DAPP PLAY STORE, I’ve shown a knack for leveraging React, Redux, and Node.js to craft user-friendly web applications. I’ve also demonstrated my ability to drastically improve existing Dapps by identifying bugs, streamlining code, and adding functionalities. During my career, I’ve consistently delivered results that exceeded clients’ expectations, proven by the following: • Developed the DApp Play Store MVP product mobil/web version with React, Redux, Tailwind, and React Native. • Deployed projects on AWS using Amazin API gateway, lambda, Cognito, and RDS. • Participated GameFi project and designed UI/UX and implemented with modern react technologies, and integrated with Binance Chain. • Integrated blockchain networks(Etherium, Binance, Polygon) with Ether.js and Web3.js. • Conductedct tests with JUnit, Mocha, and Chai and built the CI/CD code pipeline using Docker, Kubernetes, and Terraform. Although I specialize in JavaScript, I’m fluent in several programming languages, frameworks, and software. As part of a local initiative, I’ve been using this knowledge to teach coding to teens at a community center.

Developer's avatar
  • France
  • 2-5 years experience

Determine , curious and eager to learn

Hi there! I'm a Blockchain Engineer with 2 years of professional experience based in Paris. Previously, I've worked as a Blockchain developer at an institution that developed POC on decentralized Identity and a web3 Startup doing a Multisig protocol. I'm an expert at Blockchain programming and have significant experience using Ethereum, Tezos, Algorand and Cardano programming languages and full-stack stack as JavaScript, NestJS, ReactJS. I've worked on various Blockchain projects professionally. For example, I created Smart contract protocol and NFT. I'm currently looking for a FULL TIME or FREELANCER as a Blockchain developer full-stack. If you're interested in working together, please contact me.

Developer's avatar
  • Canada
  • 5 years+ experience

Web3 & Frontend Developer | Helping Companies Translate Their Business Goals to Reality

I have been working as a full-stack developer for 7 years and I recently gained valuable experience in blockchain and cryptocurrency development. Recently, I worked as a lead web3 and frontend engineer on a Defi project with token staking and farming features using React.js, TypeScript, Web3.js, Ethers.js, and The graph. Also, I worked on a couple of Defi projects and NFT collection projects as a Web3 engineer using React.js, Web3.js, Ethers.js, and Solidity. https://www.pandaparadise.io/ https://mosaic.composable.finance/ Please check out my resume and portfolio to learn more about my skills and experience. https://prodanny.netlify.app/

Developer's avatar
  • Pakistan
  • 5 years+ experience

I am a FullStack Blockchain developer. I can work with given blockchains like Ethereum, and flow, I am proficient in working with Cadence Smart Contracts, and Solidity Smart contracts, frontend with React, and libraries like Web3.j and fcl.js, and backend with Node.js, .net core. What may I do? Dapps web3 smart-contracts smart-contract integrations wallet integrations Trading portals Figma to HTML React Angular .net core Node.js My services include: Create custom DAPP on Flow, Ethereum blockchain Create a cadence smart contract, solidity smart contract Create a user interface to interact with the smart contract API integration using fcl.js and Web3

Hi there! I'm a Full stack blockchain developer with 3+ years of professional experience based in Pakistan. Previously I worked as a blockchain developer at Troontechnologies and... I am proficient in working with Cadence Smart Contracts, and Solidity Smart contracts, frontend with React, and libraries like Web3.j and fcl.js, and backend with Node.js, .net core and have significant experience using react, .netcore, nodejs. I've worked on various Blockchain projects [ Nowwhere, Madbop, Xgstudo, inflow music some are under development. For example, I created smart contracts for nft store fronts, nft marketplaces. Here are the links to my work https://nowwhere.io/index , https://www.inflowmusic.io/ , https://madbop.events/ , https://www.xgstudios.io/ . I am a contributor in onflow/cadence official repo you could check here by typing danishtroon: https://github.com/onflow/cadence/graphs/contributors I'm currently looking for a PART-TIME / FULL-TIME Blockchain developer. If you're interested in working together, please contact me.

Developer's avatar
  • Moldova
  • 0-2 years experience

Patient, responsible and motivated developer

I'm a solidity developer with 1 year of experience as a solidity freelancer on FL I'm an expert at smart contract developmentand testing and also have significant experience using JS, solidity, ERC20, ERC721 tokens, ICO, NFT makketplaces development, web3.js, ehters.js, blockchain, hardhat, openzeppelin and chainlink oracles. I've worked on various Blockchain projects as a freelancer and also in my spare time as part of self education . For example I created crypto price betting dapp using web3 technologies , an ERC721 marketplace smart contract, ERC20 tokens with ICO I'm currently looking for a PART TIME/FREELANCER job as a Solidity/Smart contracts developer / auditor. If you're interested in working together, please contact me.

Developer's avatar
  • Portugal
  • 0-2 years experience

I am eagering to learn more about web3 and to start a career!

Hi there! I'm a Engineering Student with no professional experience based in Portugal. Previously I've worked as a Research Technician at the University of Aveiro. I'm an expert at Python and Machine Learning and have significant experience using Javascript. I didn't work on any Blockchain project and I am willing to start, and to learn more. I've experimented some technologies like Solidity and web3JS in my spare time. I'm currently looking for a Full-Time job as a Junior Software Developer/ Smart Contract Developer / Blockchain Developer, but I am really into web3 so I can consider other junior roles. If you're interested in working together, please contact me.

Developer's avatar
  • Brazil
  • 5 years+ experience

Fullstack blockchain engineer

Hi there! I'm a Fullstack blockchain engineer with 2 years of professional experience based in Brazil. Previously I've worked as a Fullstack blockchain engineer at Falco and IsoForce Games in a P2E game called Mouse Haunt.. I'm an expert at solidity and typescript and i have significant experience using hardhat and nextJS. I've worked on various Blockchain projects. Part of the Blockchain team at mousehaunt, i was able to developed in solidity, many smart contracts such as: Marketplace V1, V2 and V3 (Solidity, Typescript, Nextjs) - inspired on decentraland, using transparent proxy pattern. This smart contract allow the user to sell ERC20 and ERC721 mouse haunt boosters and mouse heros. Stashing (Solidity/NextJS) - a smart contract that allows a a player stash their mouse haunt tokens on for a range of days. With a given amount and period stashed, any user can get a On-chain Tier, that it's used in-game to get benefits. SwapNFT (Solidity/Typescript/NextJS) - I was able to develop this idea in my free time and bring to team. That feature allow players to trade mouse hero 1:1. paying different fees according to stashing tier. BUSD-On-Ramp - A smart contract that uses pancakeswap router to swap BUSD for MHT. I developed and integrated this feature with the Marketplace, so players were able to buy products in BUSD and sellers receive the money in MHT. MouseHauntBox - A generic contract for ghost boosters that allows players mint the ghosts by themselves GhostNFT - A NFT to be used in-game Bonus smart contracts - Player Stash - a smart contract that allow players to stash their tokens and mouse and also put them for rent. NftRental - a smart contract to allow mouse hero renting in a player stash. GenericSignatureValidator - A robust smart contract that can be use with infinite contracts to validate wallets signatures. Was developed using Ethernal Storage and Transparent proxy pattern. Also implementing encode functions of solidity. Marketplace/booster/token 1155 - A "god" contract that implements fungible, semi-fungible and nft. And allow selling and buying them in the same smart contract. Frontend: i was able to develop with the team all those pages: - Maketplace V1, V2 and V3 - Stashing - Withdraw - Swap - BUSD On-Ramp - Burning event - Dutch Auction - Home revamp I'm currently looking for a full time role as a blockchain engineer. If you're interested in working together, please contact me.

Developer's avatar
  • Singapore
  • 5 years+ experience

Web3 Developer

Skill Set: React Golang Solidity Node.js Vue.js

Developer's avatar
  • United Kingdom
  • 5 years+ experience

Proficient Haskell and Cardano Smart Contract Developer

A well-versed developer who holds an MSc and the EMURGO Cardano Developer Professional qualification. Certified on blockchain fundamentals including cryptography, consensus, protocol tokenisation, scalability solutions, use case analysis and design. I'm a proficient Haskell and Cardano smart contract developer with a thorough understanding of the EUTxO model. I have significant experience in developing with the Plutus SDK, Nix tooling, and other essential technologies in the Cardano ecosystem including Plutarch, Lucid and the Cardano CLI. I also have experience working as a freelance full-stack web application developer, which spanned 4 years. Along with my EMURGO certification, I developed a commercially viable order book implementation using the Plutus SDK. I also have experience in testing Cardano smart contracts using property based testing techniques, such as with the Plutus contract model framework. Other programming languages I enjoy working with include TypeScript, Rust and PureScript, whilst being more than willing to learn new languages and technology stacks. I'm currently looking for a full-time position as either a Cardano smart contract developer, or full-stack Dapp developer. I will also be happy to discuss part-time roles. Please feel free to contact me if you are interested in working together.

Developer's avatar
  • United States
  • 0-2 years experience

I write clean, production-level code, enjoy building out responsive UIs, and am creative when building smart contracts.

Hi there! I'm a Fullstack Software Engineer / Blockchain Developer with 1 year of professional experience based in Boston, Massachusetts. Previously I've worked as a Fullstack Blockchain Engineer at Cinderblox. I'm an expert at React and have significant experience using Solidity, Javascript, Python, as well as web3 frameworks. I've worked on several Blockchain projects in my spare time. For example I created a fullstack social media application built for the web3 community to collaborate. The application features user secure sign in and authentication with a web3 wallet of choice, the option to set owned NFTs as a profile picture, and edit other aspects of the social media profile. Users can post written content as well as photos, which are stored in IPFS and accessed via a Moralis database. The smart contract was developed with Solidity, tested with Chai, and deployed using custom Hardhat JS scripts. The frontend was built with React and Web3UIKit. I'm currently looking for a part time or full time role as a Fullstack Software Engineer or Blockchain Developer. If you're interested in working together, please contact me to schedule a call and I would be happy to elaborate on my skillset.

Developer's avatar
  • Bulgaria
  • 2-5 years experience

Web and blockchain developer

Hello, i'm Rumen Slavov from Bulgaria 33 years old. I work as PHP developer from 15+ years and from 3 years i learn and work with solidity. I using many frameworks like hardhat, trufflem brawnie and foundry. I already have experience as working on many forks of DEX also working as security auditor at code4rena.

Developer's avatar
  • Iran
  • 5 years+ experience

Smart Contract Engineer

I am a smart contract expert with 16 years of self taught experience in the web development. I started my part time job in 2011. I have designed UIs, coded SEO-centered FE/BE apps and deployed more than fifteen websites, from small businesses to company websites. Before this job, I was working on the football team fans page, Vbulletin Hacks, Weblog themes and Chatbots. 2016 May I joined Ronak software Group as full time web developer and there I've been worked on some projects including Nested and River with related auxiliary apps like app store and admin panel. At 2017 I got familiar with blockchain. I built my own mining farm and managed it remotely by microcomputers and there was my first experience with blockchain APIs and services. Thanks to the scam projects which made me deep dive into the Solidity to understand projects. I believe Ethereum beside it's scaling solutions are incredible platform for building decentralized applications. In my free time, in addition to sports, cooking or playing video games, I research on security topics. Following web3 communities on twitter is also one of my favorites. I like the connections and the things help the people connect each other.

Developer's avatar
  • Spain
  • 5 years+ experience

Speed, security, confidence

Hi there! I'm a Smart Contract Developer with 4 years of professional experience based in Spain. Previously I've worked as a Smart Contract Developer at Utopia Avatars and other decentralized projects I'm an expert at creating everything you can imagine in blockchain and have significant experience using Solidity / Web3 / Ethers / Wagmi / Hardhat / Truffle / Foundry. I've worked on various Blockchain projects professionally. I'm currently looking for a part time / full time / freelancer as a Smart Contract Developer. If you're interested in working together, please contact me.

Developer's avatar
  • Canada
  • 0-2 years experience

Legacy developer who's trading in management for web3

Hi there! I'm technology professional with many years experience in development, management and leadership. Possess a passion for problem-solving using creative technology solutions, business analysis, project management, and process improvements while maintaining strong interpersonal relationships. I've recently been getting back into development and am excited about the web3 growth. I've worked on various Blockchain projects in my spare time. For example I created a NFT collection and a token exchange. I'm currently looking for a full time work as a web3 developer. If you're interested in working together, please contact me.

Developer's avatar
  • United States
  • 5 years+ experience

Perfectionist

I am a full-stack blockchain, AI developer and Cryptocurrency Trading Analyst & Researcher with a passion for innovation in the New Era. I have 5years experience in this industry. Now I am working as senior blockchain developer in smartest dev. First, I have been actively involved in the blockchain startup community and have had the privilege of working on a variety of projects that have honed my skills in both blockchain development. Second, I have developed some crypto trading bots and strategies with Python, Tradetron and Metatrader 4, 5. I'm confident in these fields below: ✓ Smart Contract, DeFi, Ethereum, Solana, Avax, Polygon ✓ DApps development ; Solidity + web3.js ✓ Solidity, RUST, Python, C/C++, C#, JavaScript, PHP, HTML ✓ Integration with crypto wallets such as Metamask. What I can do for you: ✓ Creating an exchange Trading platforms with 3rd part liquidity API, Margin trading etc. ✓ NFT marketplace, Defi/Dapp Development, DeFi Consulting ✓ NFTs (ERC-721, ERC-1155, Flow, BSC, Polygon, Rarible, Opensea, Nifty) ✓ ICO| STO| IEO- Developing from scratch + Marketing ✓ Smart Contract (ERC20 + ERC21) and Audit ✓ analyze transactions ✓ Wallet development (HOT /COLD/ETHER/P2P/ ETH WALLET) ✓ Cryptocurrency Pricing Website ✓ Crypto Arbitrage I would be thrilled to discuss how I can contribute and add value to these initiatives. I look forward to the opportunity to discuss this further. Whatever you wish for, I'm prepared to satisfy You. BEST WIHSES.

Developer's avatar
  • United States
  • 5 years+ experience

I am a resourceful and highly experienced Web3 professional

Hi there! I'm a Web3 Developer with 7+ years of professional experience based in the United States. Previously I've worked as a CTO at Fractal Studios and PAXL and numerous other developer positions across the metaverse. I'm an expert in EVM operations and have significant experience using Solidity, JavaScript, and Linux. I've worked on various Blockchain projects professionally. For example I created a system which generates reliable randomness solely on-chain with no oracle. I'm currently looking for a full-time as a Web3 Developer/Architect. If you're interested in working together, please contact me.

Developer's avatar
  • India
  • 5 years+ experience

Blockchain Developer With Smart Contract Expertise

Hi there! I'm a Developer with over 5 years of professional experience. Previously, I've worked as a Blockchain Developer at Mechlin Software Technologies. I'm an expert at developing innovative blockchain solutions and have significant experience using Solidity and Stellar, Cadence and many more. I've worked on various Blockchain projects professionally, including marketplaces for cryptocurrencies and NFTs, audio transcription Web3 platforms, proxy contracts, and crypto exchanges with built-in wallet features. For example, I led the development of a smart contract for a decentralized marketplace that facilitated the exchange of NFTs, ensuring secure and transparent transactions for users. I'm currently looking for a full-time position as a Blockchain Developer. If you're interested in working together, please contact me.

Developer's avatar
  • Nigeria
  • 2-5 years experience

I'm a Software developer for 3 plus years, I have been able to build real-world applications and solve problems using Javascript, NodeJs, C#, angular, and .Net framework now Solidity.

I'm a passionate web3 developer I'm looking for a job opportunity to work in the web3 space Over the past 3years, I have been able to build real-world applications and solve problems using Javascript, NodeJs, C#, angular, and .Net framework. My passion for web3 made me to enrolled in the Blockchain Nanodecree on Udacity (https://learn.udacity.com/my-programs?tab=Currently%2520Learning) and I completed the Polygon blockchain Bootcamp and hackathon where I was able to build DAPPs using Solidity, truffle, ganache, web3JS and deployed it on the polygon testnet for the hackathon ( https://github.com/G-Chilie/Decentralized-Star-Notary-Code , https://github.com/G-Chilie/FlightSuretyDapp https://github.com/G-Chilie/Chilin-s-Cat-Shop). I'm also a Technical Writer, and a content creator (YouTuber and Instagram ), as a content creator I post content on tech and career. ----> Key-skills

Developer's avatar
  • Canada
  • 5 years+ experience

Senior Blockchain & Web3 Engineer

Proven track record developing various tokens and smart contracts. Strong knowledge of Blockchain, Ethereum, Ethereum 2.0, ERC20, ERC721, ERC1155, Waves, Tron, Solidity, Rust, Solana, React, Vue.js and NodeJS for optimum functionality. Engaged in decision-making through code reviews to ensure quality and standards compliance, as well as re-usability and ease of maintenance. Highly proficient in object oriented methodologies, data structures, algorithms, as well as quality coding and excellent debugging skills.