Hire an Expert Blockchain Developer now

BlockchainDevs is the #1 Marketplace for Freelance Web3 Developers.


Showing 254 developers. Reset filters

Developer's avatar
  • Japan
  • 5 years+ experience

Highly-skilled IT expert with hands-on experience building NFT and DeFi applications to deliver effective user experiences.

Highly-skilled IT expert with hands-on experience building NFT and DeFi applications to deliver effective user experiences. Recent 3 years, focused on EVM space. Proven track record developing various DApps. Strong knowledge of Solidity, Subgraph, React, Vue.js and other JavaScript frameworks 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. Solidity development for ERC20 tokens and farming pools and love NFT development.

Developer's avatar
  • India
  • 5 years+ experience

I am a hands on Architect who has worked on Small to Big size companies and have worked both in product based and services companies for over 24 years now. Still a hands on developer/Architect and enthusiastic about new technologies like Blockchain.

Hi there! I'm a Hands-on Technical Architect with 23 years of professional experience based in Bangalore, India. Previously I've worked as a Principal Architect at Envestnet Yodlee for 10 years, as Technical Architect at Tata Consultancy Service for over 6 years, worked as Program Manager for 4 years in SeE Consulting Pvt Ltd (Startup) and as a Senior Programmer for over 3 years in Innovators India Digital Technologies. I'm an expert at Java and Solidity and have significant experience using Java, Spring/Spring-boot, Microservices Architecture, Apache Kafka, MongoDB and Oracle . I've worked on various Blockchain projects IN MY SPARE TIME. For example I created and published Cyrpto coin GFT (Gift Coin) on pancake swap. Knowledge on building Smart contracts with Solidity. Built smart contract using Solidity. Tested with Ganache using Metamask and deployed using Truffle. Have created a prototype on Multichain to solve deduplication problem in storing financial transactions. I'm currently looking for a FULL TIME / FREELANCER as a Developer/Senior Developer/Architect. If you're interested in working together, please contact me.

Developer's avatar
  • Pakistan
  • 5 years+ experience

Blockchain Dev

Since mid-2021, I've immersed myself in the Web3 ecosystem, contributing to various projects that showcase my expertise in the following areas: 1. AA-ERC4337: Developed smart contract wallets, social recovery, and paymaster smart contracts to facilitate non-native payments. 2. Game-fi: Implemented non-collateral lending and borrowing systems with a reward-sharing mechanism. 3. Defi: Developed a DEX aggregator, concentrated liquidity manager and limit orders. Presently, I work at CashFlow App its a all in one Defi Application, This project involves seamless integration of different DEXes, farming, and staking across diverse blockchain networks to compound users' earnings. I'm currently looking for a PART TIME / FULL TIME / FREELANCER as a smart contract/backend dev. If you're interested in working together, please contact me.

Developer's avatar
  • Democratic Republic of the Congo
  • 2-5 years experience

I'am a Backend & Blockchain developer. (Python| Go | Javascript | Solidity)

Hi there! I'm a Backend & Blockchain developer with more than 5 years of professional experience based in Kinshasa (DRC). Previously I've worked as a Backend Engineer at Bitkoota building the backend infrastructure for a centralized crypto-exchange. I'm an expert at Backend Web development and have significant experience using Python, Javascript and many other tools. I've worked on various Blockchain projects in my spare time. For example I created a smart contract for synthetic assets. I'm currently looking for a freelance job as a backend or blockchain engineer. If you're interested in working together, please contact me.

Developer's avatar
  • Nigeria
  • 5 years+ experience

Software developer

Hi there! I'm a software developer with 4 years of professional experience based in Nigeria. Previously I've worked as a Full stack developer at Elkins Richforth Ltd. I'm an expert at Nodejs , Express JS, Django, React and have significant experience using Mesh, Lucid. I've worked on various Blockchain projects in my spare time. I'm currently looking for a PART TIME as a Software developer. If you're interested in working together, please contact me.

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

Block-end Engineer, Crypto Evangelist.

Hi there! I'm a blockchain developer with professional experience and verifiable, extensive knowledge in web3. Previously I've worked as a co-founder at acend finance I'm an expert at solidity smart-contract development and have significant experience using solidity, typescript and react.js. I've worked on various Blockchain projects. For example I created access control contracts that can access an external API using chainlink oracles. Only kYC'ed users can be able to call the modified functions. I'm currently looking for a part-time blockchain developer role. If you're interested in working together, please contact me.

Developer's avatar
  • Brazil
  • 5 years+ experience

I have a vast experience as a developer and dedicating my time to deep dive into Web3.

Multi-skilled product and project manager with excellent supervisory and technical expertise. Agilist with practical knowledge for managing complex systems based on experience gained from developing, testing, transitioning to production, and operating fault-tolerant, highly scalable cloud-based mission-critical systems and project management practice. Ability to assemble, manage and motivate development teams. Entrepreneur with a leadership spirit try to anticipate problems to mitigate their effects. Extensive experience in integrating legacy systems, enterprise architecture, and logistical process automation between mobile collectors, RFID, and voice with CRM and ERP with Cybersecurity and Scalability skills. Deep experience in quality tools, product development methodologies, and services in business support systems. Application of ITIL and COBIT reference models best practices in design and service management and experience with PMBOK, PRINCE2, and agile project management practices. Solid expertise in systems development, infrastructure, telecom, web, and cloud computing, as well as budget management of the IT department based on Lean IT concepts. Experienced in defending budget proposals to the board of directors and referring directly to the board of directors. Practice negotiating with customers and foreign suppliers, with over 20 years of experience in IT. I am looking for a challenging IT project management position that will make the best use of my existing skills & experiences and further my personal development. I'm currently looking for a PART TIME / FREELANCER as a PO, Scrum Master, or Product Manager. If you're interested in working together, please contact me.

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

I'm a Blockchain developer with key interest in solidity language.

Hi there! I'm a Anthony with 3 years of professional experience. Previously I've worked as a Junior Blockchain developer at Blockchain support and many others as a freelancer. I’ve worked on various Blockchain projects both freelance and professional . For example I created a loan pool smart contract . I'm currently looking for a job. If you're interested in working together, please contact me.

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

I'm a passionate backend Typescript & Go software developer based in the UK!

Hi there! I'm a young Software Developer with over 2 years of professional experience based in the UK. I currently work as a CTO & Lead Software Engineer for a private investment company overseeing the continued operation an internal cryptocurrency trading platform. You can view our website @ https://www.creative.je/. I'm an expert at Typescript (Go & Solidity also offered) and have significant experience using many AWS services in production. I'm currently looking for a part time or freelancer roles as a software developer. If you're interested in working together, please contact me.

Developer's avatar
  • United States
  • 2-5 years experience

Programmer With 3 Years Of Professional Corporate Experience

Hi there! I'm a fullstack developer with 3 years of professional experience based in the USA. Previously I've worked as a fullstack developer at LeNgineer, Courtcall, and PrismHR I'm an expert at HTML,CSS,JavaScript,Vue.js,Angular,Node.js,MongoDB,Sails.js,RxJS,TypeScript,Git,Github and have significant experience using those same technologies. I've not worked on Blockchain projects but am beginning to dabble in them. I'm currently looking for a PART TIME, FULL TIME or FREELANCE role as a fullstack Web3 Developer. If you're interested in working together, please contact me.

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

Research Engineer with TypeScript, Java, and Python as main languages | MSc. in Artificial Intelligence

Andrei holds a MSc degree in Artificial Intelligence from the Utrecht University, Utrecht (2019), and a BSc degree from the Free University of Bolzano, Bolzano (2017). During his studies he worked as a research assistant the Free University of Bolzano, and Fraunhofer Italia. Later he explored machine learning techniques to learn heuristics towards solving constraint satisfaction problems at TUGraz, and worked on decentralised knowledge graphs at the University of Ghent. Andrei’s general research interests lie in hybrid (symbolic and sub-symbolic) AI decision making methods, reasoning, knowledge representation, recommender systems, and reinforcement learning. His current research concerns reasoning on decentralised knowledge graphs.

Developer's avatar
  • Romania
  • 5 years+ experience

Software Engineer & co-founder with a knack for adaptability. Excelled in diverse roles from tech to strategy, creating impactful software solutions.

My academic accomplishments include a successful diploma project on blockchain technology, focusing on Electric Vehicle Sharing. The project provided a practical solution, leveraging technologies like NodeJS, React-Native, Solidity, and Truffle. Fresh out of university and even during, I've made my mark. I co-founded Ideafy, successfully linking multiple companies with NGOs. I participated in an entrepreneurial bootcamp. Passionate about education, I've mentored over 20 kids in programming, aiding their tech career decisions. At #defineSchool, I revamped the website, enhancing user engagement and call-to-action responses by 40%. Additionally, I've guided three local businesses in the digital realm, developing their websites and expanding their customer reach. Despite a packed schedule, I launched PicoRo on the Google Play Store during my first university year, showcasing my early initiative and software development skills.

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

Fullstack Blockchain Engineer

Hi there! I'm a Smart Contract Engineer with 1 year of professional experience based in Nairobi. Previously I worked as a Fullstack Software Engineer at Mzawadi Holdings building business intelligence tools. I'm an expert at Solidity and JavaScript, TypeScript and NodeJS and have significant experience using Hardhat, Ethers, Chainlink and The Graph. I've worked on various Blockchain projects personally and for Hackathons. For example, I created a Stablecoin Lending Protocol for the recently concluded Polygon Buildit Summer 2022 Hackathon and won a prize in the Chainlink DeFi category. I'm currently looking for a part-time/full-time/ freelancer role as a Smart Contract Engineer primarily in the Ethereum Virtual Machine ecosystem. If you're interested in working together, please contact me.

Developer's avatar
  • Taiwan
  • 5 years+ experience

Accountable, Organized and Passionate

I am Alex, an accountable and enthusiastic blockchain developer. .Proficient in developing Smart Contracts, Index Layer, and front-end web development. .Designed and constructed Blockchain side projects such as a NFT Marketplace and a Decentralized Lottery website .Participated in the Chainlink Hackathon and collaborated with teammates to develop the GreenGuardian (Crowdfunding) website. .Have 5 years of Technical Product Management (TPM) experience in the AIoT field. Proficient in Solidity, Hardhat & Node.js, I’m also familiar with NextJS, React.js, theGraph, GitHub, and IPFS. I have developed: .Random Rarity NFT and NFT Marketplace https://wild-term-9441.on.fleek.co/ .Decentralized Lottery https://broken-night-6454.on.fleek.co/ .Crowdfunding Smart Contract https://main--startling-axolotl-28d020.netlify.app/ .Funding Rate Bot https://t.me/+12Ljh6_V4QY4NzRl Having personally encountered situations where contracts were not fulfilled as agreed upon, I understand the significance of establishing a robust and trustworthy framework that safeguards individuals' rights and ensures contractual obligations are met. As a result, I began researching smart contracts and blockchain technology, which ultimately captivated my interest deeply. The introduction of smart contracts, with their immutable and self-executing nature, provides a revolutionary solution to enforce agreements and uphold fairness and trust in business interactions. Throughout my career, I have been actively involved in various software projects as a product/project manager and developer. In my past project experiences, I take great pride in the "Taipei Water Management Office Smart Security System" project. In this project, I served as the project manager, responsible for communicating with the client, integrating the system development team and AI team’s outputs, and presenting them to the client. This project presented numerous challenges, and I demonstrated strong leadership and coordination skills, successfully facilitating collaboration and integration among different teams. Ultimately, we delivered satisfactory results to the client and garnered media attention, contributing to increased business opportunities for the company. This project remains one of my proudest accomplishments. Please feel free to contact me anytime via phone or email should you have any questions. I look forward to discussing in more detail. Thank you for spending time reading my bio. Alex

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

Privacy-preserving tech and Smart Contract builder.

Hi there! I'm a SGX/Blockchain engineer with 3 years of professional experience based worldwide. A little about me. I am a South African who enjoys life by living a hardworking, active and opportunistic lifestyle. I hold a Masters in Financial Technology and Data Science under the supervision of Professor Co-Pierre Goerg. During varsity I developed a keen interest for using my degree and engineering concepts as a base for entrepreneurial innovations. Fuelling a passion for start-up businesses, I was part of a few basic entrepreneurial ventures that mainly involve creating brands and selling merchandise online. As I matured, that passion intensified in the channels of privacy- preserving tech, Data Science, Fintech and Blockchain Technologies is now where my interests lie. This has lead to my previous involvement as Head Software Engineer and Innovator at the Algorand-UCT Financial Innovation Hub, and now currently the "unofficial" tech lead at a startup involved in privacy-preserving computations and blockchain integrations called Nautilus. Here I have honed my skills in Intel SGX development in Rust and specifically Pyteal algorand smart contracts. I have also co-authored my first white-paper and hope to do many more in the future! I have some spare time at the moment and I'm currently looking for a PART TIME / FULL TIME / FREELANCER jobs as a smart contract developer in Algorand. If you're interested in working together, please contact me and we can chat :)

Developer's avatar
  • Canada
  • 5 years+ experience

Creative Full Stack Engineer dedicated to developing and optimizing interactive, user-friendly, and feature-rich web sites and a Passionate skilled Blockchain Developer offering 3 years of relevant experience and a proven track record of success in achieving extraordinary results. Appreciated and commended multiple times by the upper management for efficiency. With a strong attention to detail and accuracy and the important ability to function well in a team setting, I am looking for a Developer job within a forward-moving company.

Hello. First of all, I sincerely hope everyone is doing well and safe from covid-19. I’m a computer nerd at heart. I’ve been fascinated with computers and technology since I was 5 (I’m 31 now) when my dad first introduced me to the Commodore 64 computer. I would sit in front of our TV set and not only play video games (favorites included Shamus, Frogger, Donkey Kong, Ms. Pacman, and the classic text adventure Zork), but I would read the C-Basic manual with my older brother and learn how to make simple programs. I had a re-introduction to computers at age 12 when I got my first PC (a Packard Bell 286). I was officially hooked on computer to computer communication when a friend and I called our first BBS and thought we had somehow accidentally accessed a secret government mainframe. “WHAT IS YOUR NAME?” It asked. I gave a fake name. “WHAT IS YOUR LAST NAME?” ….I hung up and unplugged the phone line from the wall. I was scared to death at first, but underneath that fear was a boiling excitement that never really left me; that drove me to learn more and more as the years went on. From there I started tearing computers apart and learning how they worked inside and out. I also immersed myself web dev and mobile app development. So I think I am a full stack developer and mobile app developer. As a full-stack web developer following expertise. -HTML, HTML5, CSS, CSS3, SCSS, JavaScript, TypeScript, jQuery, JSON, AJAX, PHP -Bootstrap 3.0, Bootstrap 4.0, Metronic -Tailwind CSS, MaterialUI, AntDesign, ReactStrap, WordPress -React.js, React/Redux, Redux/Saga, React Hooks, React strap -Vue.js, Vuex, Vue-cli, Vue, Next -Python, Django, Golang, Flask, Ruby on Rails, Drupal, Laravel -Blockchain, Solidity, NFT, Ethereum, Rust -Node.js, Express, Nest.js, GraphQL -MySQL, MongoDB, SQLite, PostgreSQL -Github, GitLab, Bitbucket, SourceTree -DevOPS, AWS, CI / CD, Versel And I have full and extensive experience in -Pixel perfection and fully responsive across all devices, PSD to HTML -Datatables with Bootstrap, React, and Vue -Development of Reusable React, Vue Component, and Directive -MySQL programming -Database Design -Backend Restful API Almost everyone carries an Internet capable device in their pocket. Just think about that for a minute or two, at the lowest level possible – a worldwide, high bandwidth network that a very large portion of the general population has access to. The possibilities are endless in thinking of the next killer app for this incredible technology available to us all today that could benefit people all over the planet (and soon to be other planets, hopefully! 😉 ) I love where the growing power, capacity and capability of the Internet is headed. If anyone wants my help, please ping me anytime. Thank you.

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

I have a background in fullstack TypeScript & Solidity

Hi there! I'm a full-stack blockchain engineer with three years of professional experience from Eastern Europe. My experience includes working as a full-stack engineer at Toucan Protocol where I have engineered smart contracts, hardhat utilities to manipulate contracts, and UIs to interact with said contracts. I'm an expert at TypeScript and have significant experience using Hardhat, Solidity, subgraphs, ethers.js, and other related technologies. I've worked on various Blockchain projects in my spare time and professionally. A lot of my work is not public, but I can share these public smart contracts: - abstract away the process of offsetting CO2 on-chain. Taking the caller from USDC (or other tokens) to retired CO2: https://github.com/ToucanProtocol/OffsetHelper - allow users to supply Aave pools and use the yield to offset CO2 https://github.com/lazaralex98/yield-offsetter I'm looking for part-time contract work (3+ months) as a TypeScript or Solidity engineer. If you're interested in working together, don't hesitate to get in touch with me.

Developer's avatar
  • Singapore
  • 5 years+ experience

Ace Dev

Proven track record developing various tokens and smart contracts. Strong knowledge of SPL-TOKEN, Anchor , Rust, ERC-20, ERC-721, Solidity and React, NodeJS . 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 Solana /Rust/ Anchor/ Spl-token/ ERC20/ ERC721/NFT/ GraphQL / TheGraph / Vyper / Solidity / Ride / React / NodeJS / Web3.js / Ethers.js / DevOps

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

Passionate and industrious blockchain developer with over a year work experience.

Hi there! I'm a Smart-Contract Developer with over a year of professional experience based in Istanbul, Turkey. Previously I've worked as a Smart-Contract Developer at DDG LLC. I'm an expert at Solidity, EVM, WAX (EOS.io) and have significant experience using Ethereum development environments like Truffle. I've worked on various Blockchain projects professionally. For example I created a smart-contracts for play-to-earn games. I'm currently looking for a full time job. If you're interested in working together, please contact me.

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

Highly communicative developer with proven leadership and solid technical skills with a deep interest for web3.

Hi all! I'm a full stack developer with 2+ years of professional experience based in Stockholm. I have previously worked as a Consultant for northern Europe's leading IT Consultancy firm (Netcompany), where I built and served as a Team Lead for building sophisticated backend solutions handling billions of dollars for the Danish government. I mainly have professional experience with Java but have also been working with Javascript and done machine learning in Python as well. In my spare time I have been learning Solidity through completing several Smart Contract tutorials and by building websites which use this technology. My English, communication skills and integrity holds a very high regard, where my work ethic matches this. I see myself as able to tackle any challenge (be that technical or not) even if I may not have all the experience in the world. I'm currently looking for a part time/freelancer job as a Smart Contract developer. If you're interested in working together, please contact me. Best Alex