Hire an Expert Blockchain Developer now

BlockchainDevs is the #1 Marketplace for Freelance Web3 Developers.


Showing 193 developers. Reset filters

Developer's avatar
  • Belgium
  • 5 years+ experience

Web3 Developer - Solidity, Node.js, TypeScript

First of all, I think it's more fair for you to agree on price per each project milestone, rather than per hour. I'm open to whatever works better for you. I started coding in 1993 and worked in software development for most of my career: as a dev lead, a project manager and a founder. I managed development teams. I love the magic of crafting high quality software products, and scaling them to be used by millions of users. As a true professional and software craftsman, I focus on quality. Clean code, good architecture and test coverage are super important to me. I'm also a big supporter of software development processes that are based on values and principles of the agile manifesto, giving client as much value and flexibility as possible. While I'm comfortable with different technologies, I can provide the most value on projects which use Solidity with Hardhat and Ethers.js, TypeScript and Vue.js. To see my work, take a look at my portfolio website. It would be great to have a call to get to know each other and join forces to build a web3 product which your users are going to love.

View profile
Available now
Developer's avatar
  • United States
  • 5 years+ experience

Ingenious, Determined, and Self-motivated senior software engineer

Hi there! I'm a Sr Blockchain & Fullstack with 9 years of professional experience based in the United States. Previously I've worked as a Sr Blockchain & Fullstack Engineer at Oasis Web Asia, Moontek, and Coincheck. I'm an expert at JavaScript, TypeScript, Ract, Angular, Vue, Node, Express, Nest, Golang, Solidity, Rust and have significant experience using React, Node, and Solidity. I've worked on various Blockchain projects. For example I created smart contracts for NFT platform, DeFi, and DAO projects. I'm currently looking for a Full time / Freelancer as a Sr Fullstack or Blockchain developer. If you're interested in working together, please contact me.

View profile
Available now
Developer's avatar
  • Argentina
  • 5 years+ experience

Automated program analysis expert. Aspiring entrepreneur

Hi there! I'm a Phd candidate in software engineering with 6 years of professional experience based in Argentina. Previously I've worked as a Java Developer at Mulesoft. I'm an expert at program testing automation and have significant experience using and creating advanced program analysis tooling. I've worked on a personal Blockchain project that I'm launching shortly. I'm currently looking for an experience as a smart contract engineer. If you're interested in working together, please contact me.

View profile
Available now
Developer's avatar
  • Canada
  • 5 years+ experience

Substrate Developer

Hi there! I'm a full stack blockchain developer with 4 years of professional experience based in Vancouver. Previously I've worked as a full stack blockchain developer at Dystopia Labs and VineKross LLC. I also participated in some blockchain projects as a front end developer and Web3 developer. I can build dApps on EVM-compatible chains, FLOW and WAVES. I'm an expert at C++, Javascript, Typescript, Solidity, Rust, Ride and Cadence. I've worked on various Blockchain projects PROFESSIONALLY. For example I created a NFT marketplace platform(https://hashgreed.com) and a Web3 event ticketing platform(https://web3-platform.vercel.app). I also learnt Substrate, which is a future-promising technology to build the internet of the blockchain networks. I'm currently looking for a FULL TIME as a full stack blockchain developer / Substrate developer. You can learn more about me on this page. https://about.me/cuteolaf If you're interested in working together, please contact me.

View profile
Available now
Developer's avatar
  • Palestinian Territory
  • 5 years+ experience

20yrs+ MENA Serial Entrepreneur, Inventor of NFT2.0, Web3 Business Development, GTM, Blockchain, Growth Hacker, Polygon and Ethereum Network Smart Contracts Developer

- A16z Startup Crypto School (Completed) - MIT Open Courseware Blockchain and Money (On Progress) Snapshots from My Career A Web3.0 Technologist, Entrepreneur & Innovator During the past 20yrs of my professional career, I’ve been designing and executing GTMs and creating partnerships of disruptive business models for industries including NFTs, CBDCs, Cryptos, Edtechs and e-Commerce. In my latest position in a Web3 startup called Nftania, I was responsible for the following: - SMART CONTRACTS: I oversaw the development of Smart Contracts as I code solidity myself to make sure that the GTM and utilities are reflected in the tokenomics of the smart contracts. - FULL STACK DAPPS: Participated in the integration between the Backend and blockchain based solutions on Ethereum with a front end python/JavaScript dapp interface. - TOKENOMICS: Led the company’s efforts in engineering a non-pump and dump utility based tokenomics and the gamification of it to entice the NFT community into meaningful and value based asset appreciation while owing the NFT2 ERC20 token - WEB3 PARTNERSHIPS: Led the recruitment and partnerships with luxury brands and celebrities’ items to be converted into NFT tokens using Nftania’s authentication NFT2.0 technology, successful on boarded the Legendary Steve Wozniak cofounder of Apple - UTILITY FOCUSED: Worked with product and blockchain teams to develop killer-apps and true utility “value proposition” with NFTs to create physical product authenticity solutions. - VIRAL GTM: Partnered with Twitter, Moralis and Heroku to create a social twitter bade campaign to onboard NFT community member to a crowd sale of NFT2.0 Tokens that eventually tokenize physical assets. Detailed experience In web3: Chief Business Development & Partnerships Officer & Smart Contract Developer Nftania Labs Background: Nftania’s vison is to tokenize the world’s physical assets and bring them on chain. To create the Internet of Goods economy, Nftania developed the next Gen NFT technology for physical assets, with the integration of computer vision technology, machine learning, artificial intelligence and blockchain technology; Nftania was able to solve the last-mile-problem of physical provenance of physical assets (which establishes the robust connection between the digital token and the its physical asset counterpart, to guarantee its authenticity). Smart Contract Development: hands on experience in developing smart contracts to build tailor made solutions that serve business needs, while applying state of the art best practices of smart contract security, this experience includes tokens airdrop, presale, ICO / Crowd sale, Liquidity pool Creation (Automatic and manual liquidity pool, creation for ERC20 Tokens),Token Development including ERC20 Token, NFT Development: ERC1155,NFT Development including ERC721, Generate-at-mint traits NFT minting, Verifiable On Chain Random Number Generator (VRF Contract), On chain raffle for whitelisting for NFT Minting, NFT Based Application Gating, Vesting, Token Locker, anti-counterfeiting Blockchain-based Academic Certification System. Advanced Tokenomics: Design ICO/IEO/IDO Process and launch DAPP Team Building: Integration with backend systems Like Moralis.io, and front end User Interface NFT Experience: NFT Value proposition creation and utility design. Tokenization of physical assets and solving physical provenance dilemma. In depth market understanding of most famous NFT projects, Deep understanding of NFT industry dynamics and trends, Awareness and access to top NFT industry influencers, Deep technical understanding of NFT technology its Pros, Cons, and its limitations. Business Development Initiatives: • Global Leaders Partnerships: Designed and Developed Unique Business development approach Groundbreaking Leader Partnerships: Researched, targeted, crafted story, contacted, created demo, and partnered with Apple cofounder Steve Wozniak to make global announcement of Nftania’s new technology “The world First Physical NFT2.0” asset Researched Created A story to Kareem Abdul-Jabbar (For memorabilia), Guy Kawasaki. • Top Brands Partnerships: Developed a concept for the world First NFT collection for real life physical Watches with metaverse digital twin limited edition of (physical NFT for BAYC holders), similar to what Tiffany did with its jewelry for the Crypto Punks collection holders and LVMH (For Limited Edition Perfume). • Go-To-Market Strategy (GTM): Created a Twitter based ERC20 token Airdrop each amount for one ERC2.0 token that can be exchanged with one license • Product Viral Launch campaign: Created a domino effect Twitter based viral launch campaign which align interests of top NFT influencers and NFT collectors with the Launch of NFT2.0 technology. The concept design, smart contracts development, built a team for DAPP front end and backend and twitter integration. Business Model Innovation: Developed an end to end business model utilizing game theory to align the interests of all stakeholders along with the business goals to build strong community of believers and brand ambassadors for the technology and the brand, this model is built on mixing licensing model for NFT2.0 technology to enable widespread and mass user adoption by tokenizing the licenses of NFT2.0 software in the form of NFTs of type ERC1155 (Nftania Eggs). Product Development: NFT New Product Development, Product Roadmap development, Product design.

View profile
Available now
Developer's avatar
  • Canada
  • 5 years+ experience

Full Stack developer with over 8 years of experience in web and blockchain development. Experienced in DeFi, DEX and NFT projects.

Hi Here is a full stack developer with over 8 years of experience in web and blockchain development. Have developed DEX, DeFi and NFT marketplace and my role is frontend, backend, smart contract development and web3 integration. Well-versed in using Hardhat and Truffle for smart contract development and unit test. My skills; - Solidity, Rust, Haskell, GO, Cosmwasm - Hardhat, Truffle - Web3.js, Ether.js, CosmosJS, Alchemy - React.js, Vue.js, Angular, Next.js, Nuxt.js - Javascript, TypeScript - Laravel, CodeIgniter, WordPress - Node.js, PHP, Express, Loopback, NestJS, GraphQL, Subgraph - C, C++, C#, Python, Java - Game development, Unity3D My experience; - DeFi, DEX and NFT marketplace development - ICO, IDO, IFO - Blockchain(NFT) game development - Website development (frontend and backend) Can start working immediately and can work in your time zone. I will share my previous projects and relevant experience in an interview. Please feel free to contact me if you have any projects or new job opportunities. Best Regards, Billy

View profile
Available now
Developer's avatar
  • United States
  • 5 years+ experience

Relentless on the details.

Hello, I’m a full stack web3 engineer, and I’ve worked on all aspects of a web3 product. At my last company I owned the engineering of the MVP web app (app.dimo.zone), and had a large role in the associated mobile app. I did most of the web3 integration into these products. I worked on the smart contracts for on-chain vehicle identity using ERC721, and the diamond pattern. We used meta-transactions to make the onboarding experience more smooth. The contracts were bridged to the Polygon L2 out of fee considerations. I was also on the hardware team. I was responsible for integrating the HSM to be compatible with Ethereum cryptographic operations. I am looking to get in on the ground floor of a web3 startup, and help refine the product over many iterations. Thanks, Hersh

View profile
Available now
Developer's avatar
  • United States
  • 5 years+ experience

Dedicated and motivated IT professional, Blockchain Engineer, Full Stack Developer

Hi there! I'm a Senior Blockchain Engineer with 5 years of professional experience based in San Francisco. Previously I've worked as a Lead developer at Maui Finance, Sphynx Labs, etc. I'm an expert at Solidity, Rust and Javascript and have significant experience using Web3. I've worked on various Blockchain projects professionally. For example I created a Dex/Staking contract on BNB chain and comprehensive multi-strategy vault on Ethereum, as well as several NFT marketplaces. I'm currently looking for a Full time position as a Blockchain Engineer/Full Stack developer. If you're interested in working together, please contact me.

View profile
Available now
Developer's avatar
  • Singapore
  • 5 years+ experience

Senior Fullstack Blockchain developer

Hi there! I'm a Senior Fullstack Blockchain developer with 3 years of professional experience.. Previously I've worked as a Web3.js Frontend developer at CIV Farm Org. I'm an expert at Ethereum and web3.js and have significant experience using EVM based Blockchain technologies. I've worked on various Blockchain projects. I'm currently looking for a FULL TIME as a Senior blockchain fullstack developer. If you're interested in working together, please contact me.

View profile
Available now
Developer's avatar
  • China
  • 5 years+ experience

Senior blockchain | Full Stack engineer

Hi there! I'm a Senior blockchain | Full Stack engineer with 5 years of professional experience based in Hong Kong. Previously I've worked as a Senior Blockchain Developer at Silo Finance and as a Junior Blockchain and Web Developer at Point Network. I'm an expert at smart contract and front-end development and web3 integration and have significant experience using solidity, rust, react, web3.js, typescript and so on. I've worked on various Blockchain projects professionally. For example I created a smart contract which has dividend, swapable and anti-bot features. I'm currently looking for a full-time job as a blockchain developer. If you're interested in working together, please contact me.

View profile
Available now
Developer's avatar
  • Japan
  • 5 years+ experience

Full stack && BLOCKCHAIN Developer

Hi, I am a senior blockchain developer with proficiency in NFT marketplace, Smart Contract development, ICO& IDO, Smart Contract Audits, DeFi/DApp development. My blockchain experience is extensive, having worked with blockchain since 2017. I am well-versed in the following services: ▶️ Smart Contract Development 🔹 ERC20, ERC721, ERC721A, ERC1155, BEP20, BEP721 Standards, Solana, EOSIO, WAX, Elrond networks. 🔹 Contract Test and Audit in development environment by using Truffle, Hardhat 🔹 Anti-Bot, Whitelist functions integration for Token, NFT contracts 🔹 Wrap Token Contract development from BTC, NDAU, Doge, etc. ▶️ Smart Contract Audits 🔹 Code checking line by line 🔹 High/Middle/Low level severity Audit test on the testnet, devnet 🔹 Provide audit with functional example ▶️ Defi/ DApp Development 🔹 Forking Dex tools like Uniswap, Sushiswap, Pancakeswap, Rubic with special requirement 🔹 Crypto Escrow System development (Frontend: React, Backend: Laravel, Python/Flask, Escrow Contract development) 🔹 ICO & IDO, Token airdrop & presale service platform with custom supply, Liquidity, whitelist 🔹 Wallet connection using web3.js or ether.js ▶️ NFT minting & staking, marketplace Development 🔹 Minting, Staking Contract on ERC721, ERC1155 standards on Ethereum, Polygon, Avalanche, BSC, Harmony, Solana network 🔹 P2E (Play to Earn) contract development ▶️ Cross-Chain-Bridge Development. 🔹 Child Token, Bridge Contract development 🔹 Relay service integration like Moralis, Chainlink, Chainstack 🔹 Well-made Cross-Bridge DApp development using react.js, web3.js, MongoDB ▶️ CEX Development 🔹Spot & Margin Trading option, Multi-Chain Support 🔹 Fiat Withdraw, Deposit function by using PayPal, Stripe, CoinPayment, Perfect Money Api integration 🔹 Well-Structured DB Design ▶️ Crypto Bot Development 🔹 NFT Minting & Sale Order Bot development 🔹 Auto Trading Bot 🔹 Crypto AIO Bot I am available on the flexible timezone, and I can accept full-time, part-time, contest position. Therefore If you share your idea, I will make it to reality. Best Regards. We will meet on the crypto-verse.

View profile
Available now
Developer's avatar
  • India
  • 5 years+ experience

Blockchain Developer

Hi there! I'm a Blockchain Architect with 4 years of professional experience. I'm an expert at Ethereum and EVM based chains and have significant experience using Solidity, DeFi Apps, Javascript, Typescript, Node JS, React Js. I've worked on various Blockchain projects. I have built Cross-Chain Bridging Solutions for ERC20 token transfers, Staking, Vesting, NFT Marketplace contracts, and integrating protocols like UniSwap, Aave in web applications... among others I'm currently looking for exciting work in DeFi. If you're interested in working together, please contact me.

View profile
Available now
Developer's avatar
  • Philippines
  • 5 years+ experience

I have done NFT, ICO, staking, trading, cyrpto wallet projects (i can show the demo)

i have done almost whatever is popular in the market for cyrpto or blockchain, i am part of active cyrpto community and business people who are wanting new things to be done.... so just let me know your blockchain projects.

View profile
Available now