Hire the best
freelance Smart contract developers

Qedric J.

Freelance Smart contract developer in Germany

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I'm a seasoned smart contract engineer working primarily with Solidity EVM. I write optimised, gas-efficient code and conduct rigorous testing. I have hands-on experience with contract development, token standards, several Layer 2 chains, as well as front end, dApp, and middleware development. Prior to working in blockchain/web3, I have a background in enterprise IT infrastructure, leading the technical design and implementation of several large scale projects in the banking and government sectors. I’m the creative type and a keen musician; my ideas are infused with a delightful touch of 'outside-the-box' thinking, reflecting a profound love for crafting novel and transformative strategies.

Smart contract • 5 yrsTypeScript • 4 yrsSolidity • 3 yrsBlockchain • 3 yrsCryptocurrency • 9 yrsEthereum • 8 yrsNode.js • 7 yrsJavaScript • 7 yrsVue.js • 6 yrsReact • 5 yrsNext.jsLiquidTailwind css

+6

John K.

Freelance Smart contract developer in the United States

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I am a former Microsoft distributed systems engineer who has spent his career on the cutting edge of cloud and web3 computing with 6+ years of experience. I have ~5 of deep experience architecting, developing, and operating systems at planet scale and have spent the last 2 years empowering smaller organizations to reach that level. I am hungry to continue building scalable, performant, and maintainable systems in high-performing, mission-driven organizations. I'd love to share a few parts of my professional journey with you below: I grew the most from my time working on Microsoft Azure Networking. As a professional, an engineer, a teammate, and a leader, I had completely changed from a timid, totally green new grad to someone who had delivered entirely new public-facing features, collaborated with brilliant engineers to scale and grow a planet-scale computing platform, and self-actualized and gained confidence in my skills and abilities technically and professionally. I grew as a leader and mentor, gathering feedback from new hires at a time when we were all adjusting to remote-only collaboration during the pandemic, and acted on it in order to drive a culture of documentation and mentorship that our organization was lacking. I'm very lucky to have had such a profound growth experience as my first role as I was starting my career, and I'm eager to continue to ply these skills in my next role. There are myriad projects which benefited from my contributions, but one that I'm particularly proud of focused on the scalability, reliability, and modernization of the Azure Software Defined Networking control plane. For context, every creation, update, or deletion of virtual networking resources came through our regional controller; each time a customer updated their virtual network, our service needed to drive a corresponding update in our physical network and data plane. My focus during my time in Azure Networking was on delivering scalability and reliability improvements and delivering new SDN features to our product offerings. I was able to eliminate several critical single points of failure from our architecture, enhancing the reliability of Microsoft’s cloud offering as well as our ability to scale. One example I'll focus on was my work to transition a key singleton microservice to a sharded alternative. The microservice in question was part directory service, part load balancer. It was responsible for storing mappings from customer ids or resource ids to a given worker partition, and provided load balancing among these worker partitions for new resources. This particular microservice was both critical (i.e. in the hot path of every API call) to the functionality of our distributed application and a critical obstacle to our scalability and availability; the total state (which was maintained on replicas of the service) size and read/write traffic volume on the service was creating severe performance issues and threatening to lead to loss of availability. We needed to design, develop, test, deploy, and migrate to a scalable alternative, quickly. My task was to lead this effort. I was able to replace this service with zero customer downtime. The delivery of this project removed an entire category of scalability and availability issues which were previously presenting severe problems to our control plane. One of the things that my coworkers have consistently mentioned to me over the course of my career is that they (miraculously) genuinely enjoy working with me. They've related a few reasons for that; chief among them is that I'm an empathetic and effective communicator. I strive to be as upfront, concise, honest, and caring as I can be when working on any team. Another aspect that they've related is that I can bring a good amount of levity, humor, and positivity to the organizations I join. I'm very cool under pressure (I definitely developed quite a bit of tolerance to it), and I know firsthand that everyone has a better time if we actually enjoy interacting and socializing with each other.

Smart contractBack-End • 6 yrsDevOps • 6 yrsC# • 5 yrsContainers • 6 yrsPython 3 • 2 yrsSolidity • 2 yrsPython • 2 yrsTypeScript • 2 yrsKubernetes • 2 yrsPostgreSQL • 2 yrsNode.jsGitHubRedisDockerpytestDigitalOceanDatadogPrismaExpress.jsRustEthereumgRPC

+16

Mihailo M.

Freelance Smart contract developer in Serbia

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As a seasoned **Solidity Smart Contract Engineer** with over 4 years of experience, I bring an in-depth understanding of DeFi, NFTs, DAOs, dApps, blockchain oracles, EVM, cross-chain bridges, layer 2 scaling solutions like optimistic and zero knowledge (ZK) rollups and the wider web3 ecosystem. With a specialty in Solidity smart contract development, I've contributed to numerous web3 and DeFi projects since 2018 and delivered hundreds of production-ready smart contracts while ensuring best practices and security. Combining my technical proficiency with a native-level English fluency, I am a skilled communicator, adept at remote collaboration, and always focused on delivering results in this rapidly evolving sector.

Smart contract • 5 yrsEthereum Smart ContractsEthereum • 5 yrsSolidity • 5 yrsTypeScript • 6 yrsNode.js • 6 yrsReact • 6 yrsJavaScript • 6 yrsCryptocurrency • 5 yrsBlockchain • 5 yrsDeFi • 5 yrsWeb3

+5

André .

Freelance Smart contract developer in Peru

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I am a Full Stack developer with experience in Blockchain and decentralized applications. I have implemented solutions for food traceability and digital document registration using Blockchain technology. I have also worked on projects involving Blockchain architecture, Smart Contracts development, and the creation of private networks. My skills include: .NetCore, C#, Nethereum, React, Vue, Ethereum, Solidity, Truffle, Firebase, AWS, and JavaScript. I am proactive, focused on results, and self-taught, passionate about technology and everything related to the blockchain environment.

Smart contract • 4 yrsJavaScript • 7 yrsReact • 6 yrsWeb3 • 4 yrsSolidity • 4 yrsHTML/CSSTypeScriptMaterial-UINext.jsStyled-ComponentsBlockchainVue.jsTruffle suite API.NET Core

+8

Niket Y.

Freelance Smart contract developer in India

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Team lead engineer & a blockchain enthusiast with more than 10-years of IT experience who uses holistic thinking & attention to detail to create maintainable solutions. Technical knowledge and expertise: • Proficiency in Java, Nodejs, Solidity and other latest frameworks. • Exposure to blockchain related technologies like Hyperledger, Composer, Corda, Quorum, Ethereum, Solana, Docker, Kubernetes, NodeJs, Couchdb & Python. • Knowledge of related technologies like Maven, JPA. • Knowledge of version control system like Github. • Good understanding of relational as well as no sql databases. Qualities and attributes possessed: • Good reasoning and analytic skills • Good interpersonal and communication skills. • Strong coding ethics, with a drive for work completion. • Willing learner. I work well with people and enjoy getting the work at hand completed. Have a look at my profiles: [https://www.linkedin.com/in/niket-yende/](https://www.linkedin.com/in/niket-yende/) [https://github.com/niket-yende](https://github.com/niket-yende) Thank you for your time and consideration. Sincerely, Niket Yende.

Smart contractNode.js • 7 yrsMongoDB • 5 yrsJava • 5 yrsTypeScript • 3 yrsRustBlockchainSolidityWeb3RESTful APIJavaScriptEthereumPostgreSQLAmazon S3RedisMochaDockerGoogle Cloud PlatformSwaggerMicroservicesGrafanaPrometheusWeb3.js

+16

Narcis C.

Freelance Smart contract developer in Romania

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Senior Software Engineer with a passion for designing and building innovative software solutions from the ground up. Skilled in collaborating on diverse projects, ensuring efficient and high-quality delivery. Committed to driving project success and continually enhancing technical expertise.

Smart contractNode.js • 6 yrsJavaScript • 6 yrsBlockchain • 4 yrsWeb3 • 3 yrsSolidity • 3 yrsTypeScript • 2 yrsRustAPIRedisElasticsearchCryptocurrency

+5

Nikhil B.

Freelance Smart contract developer in India

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Bringing over 6+ years of experience as a Senior Blockchain Developer, I specialize in planning, designing, and developing secure smart contracts customized for DeFi, NFT, and customized blockchains. My extensive background encompasses a profound understanding of lending market protocols, Oracles, Governance, Marketplaces, Cross-chain mechanisms, AMMs, and Layer2 solutions. Recognized for my adeptness in translating intricate blockchain concepts into user-friendly experiences, I serve as a valuable asset in both frontend development and smart contract implementation. Beyond my technical proficiency, I bring strong communication and interpersonal skills that further enhance my professional abilities. Programming Languages: Solidity, Golang, Rust, JavaScript, TypeScript, Node.js. Blockchain: DeFi, NFT's, Layer2, IPFS, Oracle, ZK proof, MEV Bots, EVM, Hyperledger, Corda, Smart Contract Audits Unified Liquidity Mechanisms (dAMM, SLAMM, VAMM, Delta Algorithm), PSM Module, Hyperlane, Uniswap, Aave, Lido, Compound Protocol, Opensea, Sandbox, Rarible, Euler Finance, Curve, Cross-Chain Liquidity Bridges, OpenZeppelin Contracts, CryptoPunks, Chainlink, Perpetual Futures Frontend Development: NextJS, ReactJS, JavaScript, HTML/CSS Backend Development: Express, Node, C++, Java Database Management: MySQL, MongoDB, PostgreSQL Development Frameworks and Libraries: Web3.js, ethers.js, React.js, Redux.js, Vue.js, Next.js

Smart contractEthereum • 6 yrsSolidity • 6 yrsPython • 6 yrsReact • 6 yrsNft • 6 yrsDeFi • 6 yrsBlockchain

+1

Gimer C.

Smart contract developer in Mexico

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Experienced **smart contract** developer and consultant for the **Ethereum Blockchain** since 2019. Solid background in Information Security and advanced knowledge in different programming languages such as **Solidity**. Besides my Blockchain experience I hold a **Ph.D. in Computer Science** from Carleton University, Ottawa, ON. Canada granted in 2012. Looking forward to have a real impact in the space as a smart contract developer and blockchain security auditor.

Smart contractEthereum • 5 yrsSolidity • 5 yrsJavaScriptBlockchainInformation Security

Claret N.

Freelance Smart contract developer in Nigeria

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My name is Claret Nnamocha, and I bring over 5 years of experience and a passion for building scalable solutions on the web, blockchain, and mobile platforms.

Smart contractNode.js • 5 yrsNestJS • 4 yrsSQL • 6 yrsExpress.js • 5 yrsReact • 5 yrsReact Native • 4 yrsSolidity • 4 yrsXcodeAndroid StudioTypeScriptJavaScriptiOSMobile App DevelopmentFinancial modelingBanking TechnologyEncryptionSwaggerEthereumCryptocurrencyWeb3.jsCryptocurrency wallet Nft CryptographyMobile WalletExpo

+19

Henry O.

Freelance Smart contract developer in Nigeria

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I am a seasoned Solidity developer with over four years of experience in blockchain and smart contract development. My journey in the world of decentralized applications and blockchain technology has allowed me to work on a wide range of projects, from DeFi applications to NFT platforms. I am passionate about creating secure and efficient smart contracts, and I thrive on tackling the challenges presented by this ever-evolving space. My commitment to quality, strong problem-solving skills, and dedication to staying at the forefront of blockchain technology make me a valuable asset to any team or project.

Smart contractEthereum • 7 yrsSolidity • 5 yrsNode.jsTypeScriptWeb3Web3.js