Hire Vetted Blockchain Engineers at Upstaff - Page 3

Software engineer with over 5 years of development experience, specializing in blockchain platforms, DeFi, and DApps. Demonstrates expertise in Ethereum ecosystem (DEX/CEX integrations, GameFi, lending, RWA, wallets, ZK systems), and diverse blockchain technologies such as Bitcoin, Stellar, and StarkNet. Key competences include Solidity development, smart contracts audit, crosschain NFT systems, and proposing standards like ERC-8006. Possesses advanced knowledge in backend engineering utilizing technologies like Node.js, Python, and .NET, with a strong foundation in computer science from Kharkiv National University of Radioelectronics. Skilled in Full SDLC, devises encryption solutions (zk-proof, homomorphic), and excels in developing auxiliary tooling and technical documentation. Active in OSS, contributing to security (Slither, Echidna, Manticore, Mythril) and infrastructure projects (AWS, DigitalOcean, Heroku).

- 12+ years of experience. - Present talks, explain and give classes about web3 concepts and integrations for blockchain, NFTs, cryptocurrencies, and metaverses. - Bridged the gap between Product/Product Marketing providing data for ‘wants vs. needs’ of dev community for product development. - Executed production strategies and campaigns to more than 500 million users worldwide for all content available on Google Play store. - Led the product development for a multi-million dollar mobile Disney game planning sprints and restructuring the entire project. - Directed product development at five tech and game startup companies simultaneously while getting a Master of Science degree. - Led development of ground-breaking web projects at my own startup using custom-built systems and advanced API integrations. - Upper-intermediate English. - Available ASAP.

- 9+ years of experience in IT; - Experience working with Blockchain products; - Deep knowledge and skills in development of fintech products (CeFi/DeFi); - Work experience with Development and work on UI / UX design, and web programming (HTML, CSS); - Familiar with logic controller and CNC machine programming; - Experience in project management and sales - Good skills in organizing the work process in a team using Agile methodology; - Good understanding and vision of product development and its design solution; - Upper-Intermediate English; - Available ASAP.

- Accomplished Software Engineer with over 4 years of experience in developing robust code for high-volume businesses. - In-depth expertise in project management and a proven track record of applying skills in the efficient completion of several large-scale projects. - Highly skilled in SEO integration, digital marketing, and community management, particularly within the crypto and blockchain domains. - Holds multiple certifications in Moderating and Community Management, Project Management, Digital Marketing, and web3 management. - Technical prowess in project management platforms, community moderation tools such as Discord and Telegram, and leveraging social media analytics to enhance follower retention and engagement. - Recognized for successfully leading the Web3 community management, with achievements including a 20% improvement in follower retention through the introduction of new analytic protocols.

● 9 years of Ruby on Rails development ● Extensive knowledge in web and mobile development lifecycle ● Skilled in agile and waterfall project management methodologies, SCRUM experience ● Accountable, communicable, dedicated team player, self-motivated, conscientious, creative individual, well-experienced in troubleshooting, able to learn quickly and effectively ● Upper-Intermediate English ● Computer Systems Analyst (Master's degree)

- Senior Blockchain & Full Stack Engineer with over 15 years of experience in Web and Blockchain development. - Highly skilled Blockchain Professional with hands-on experience building Decentralized Applications and NFT Marketplaces. - Deep understanding of the architecture and protocols of Blockchain and Hyperledger including Bitcoin, Ethereum, L2 solutions, Cross-Chain. - Concentrating on ICO/IEO/IDO projects, helped many Startups and enterprising companies to raise funds and build Ecosystems on the Blockchain. - Quant Developer with a rock-solid understanding of Financial Markets, Quant Trading. - Strong at Solidity, Python, Rust, Web3.js, React, Typescript, Next.js, Node.js, Moralis. - A Veteran at C/C++/C#. - Great teamwork and troubleshooting skills. - Full-time remote, 40+ hours a week. - Upper intermediate English

- Software engineer with 10+ years of experience, specializing in Web and Blockchain technologies; - Expertise in Solidity for designing and deploying smart contracts; - Experienced in using Hardhat and Truffle for smart contract development and testing; - Deep abilities in Ethereum ecosystems and Solidity-based architectures; - Skilled in Ether.js and Web3.js for building dApps; - Proficient in designing complex systems, including yield farming and DeFi protocols; - Strong background in full-stack development; - Skilled in Node.js, Express.js, PHP, Java, and Kotlin for backend development; - Experienced in front-end development with Vue.js and EJS JavaScript frameworks; - Proven experience leading projects from concept to deployment across the entire SDLC; - Skilled in mentoring remote teams and collaborating effectively across functions; - Experienced in solution architecture, designing scalable systems, and ensuring smooth integration across platforms.

- Python Software Engineer with more than 4+ years of experience in software development - Proven ability to design and build telegram chatbots from scratch, implementing functionalities like search algorithms (CV parsing), voice recording, and payment processing integrations (Stripe, Liqpay). - Has experience integrating GPT with telegram bots - Expertise in database management (PostgreSQL, SQL Alchemy) and data security. - Implemented continuous integration and deployment practices (Jenkins, Docker) for streamlined deployments. - Excellent knowledge of common software engineering practices, like OOP principles, modern design patterns, test-driven development, continuous integration, and continuous deployment

-As a senior Programmer and Blockchain developer, with over 6 years of development, I am an expert in NFT Website, NFT Art Generation, and NFT Marketplace, Solidity, Web3, EVM based network chains, Custom smart contracts, ERC20/721, ERC1155, NFTs, IDO's, Bridges Block explorers, UI Web3 Dapps Integration, IPFS. - Smart Contract Development (Solidity/ Rust/ Anchor Framework/ Cosmwasm) - Cardano smart contract by utilizing CosmWasm smart contract by utilizing Rust CosmWasm. - Solanasmartcontractimprovement(Unittest,Solana-program-library,Solana-web3,Raydiumtradeandorca)by utilizing Rust and Anchor system. - Polkadot Relay Chain using Substrate in Rust programming. - Smart contract advancement in networks (Ethereum, BSC, Matic/Polygon) by utilizing Solidity. - Uniswap V2, V3, Curve (Yearn, Convex), Sushiswap, Quickswap, etc. - Written smart contracts for ERC20, ERC223, ERC721, ERC1155, ICOs, airdrop, Vesting, MultiSig, Wallet, etc - DeFi, Dex protocols - Front-end development with Smart contract integration by utilizing Web3, truffle. React (Redux/Thunk/Saga), Typescript, Node js. - NFT minting website andNFT marketplace development(Create a listing by admin, flat&Crypto payment,Bundle Sale/ Bulk Transfers, Drop)

Software engineer with a Bachelor’s in Computer Science and 8 years of experience specializes in blockchain development, smart contracts, and DApps, mainly in Solidity and Rust. Demonstrated expertise in Ethereum and Solana ecosystems with significant projects such as a fully-featured NFT marketplace and the first multichain swap protocol. Excelled in developing secure, scalable solutions with 99% test coverage in Rust, contributing to the advancement of decentralized protocols. Adept in various technologies including Go, Move, Web3, DeFi, and smart contract auditing, positioning as a valuable asset for blockchain-centric roles.

Blockchain Developer | Web3 Engineer | Smart Contract Specialist Experienced Blockchain Developer with a deep understanding of decentralized applications (dApps), smart contracts, and blockchain architecture. Skilled in Ethereum, Solana, and Binance Smart Chain (BSC), with expertise in Solidity, Rust, and Web3 integrations. Passionate about building scalable, secure, and efficient blockchain solutions that drive innovation in DeFi, NFTs, and enterprise blockchain applications.Key Skills & Expertise: ✅ Blockchain Development: Smart contracts, tokenomics, DeFi protocols, NFT marketplaces ✅ Smart Contract Programming: Solidity, Rust, Move, Cairo ✅ Fullstack Web3 Development: Node.js, React, Next.js, Nest.js, Web3.js, Ethers.js ✅ Blockchain Frameworks: Ethereum, Solana, BSC, Polygon, Hyperledger ✅ Security & Auditing: Smart contract security, cryptography, vulnerability mitigation ✅ Infrastructure & DevOps: IPFS, The Graph, Oracles, Infura, Alchemy, Hardhat, Truffle ✅ Consensus & Protocols: Proof of Work (PoW), Proof of Stake (PoS), Layer 2 scaling

Product manager with experience in NFT project. - Almost 9 years of diverse experience in tech: Product Management, Agile Project Management and Business Analysis. - Upper-intermediate English. - Available ASAP

Seasoned Head of Engineering with 8+ years of experience in driving technical strategy and leading multidisciplinary development teams. Expertise in AI, blockchain, and full-stack custom software solutions including MERN stack, PHP, and MySQL. Proven track record at Macromodule Technologies, shaping engineering culture with agile principles and maintaining focus on delivering business-aligned, future-ready software products. Holds a Bachelor of Science in Computer Science and has previously elevated backend systems at Dtech Systems and spearheaded full-stack projects at ArhamSoft. Known for integrating emerging technologies and establishing engineering KPIs that foster continuous improvement and technical excellence.

Experienced Backend Developer with a strong foundation in Computer Science and over 3 years in fintech, Web3, and real estate domains. Proficient in TypeScript, NestJS, PostgreSQL, MongoDB, and blockchain tools such as Web3.js and Ethers.js. Led major projects including Bloomvest V2 migration to PostgreSQL and scalable API design, Trilla's real estate fractional ownership platform, and high-performance blockchain indexers. Skilled in modular architecture, real-time communication via WebSockets, and secure multi-role backend systems, delivering robust, scalable decentralized and centralized applications.

Accomplished Full Stack Blockchain Developer with over 9 years of experience in the industry, specializing in the integration of Web3, Rust, Solidity, and other technologies to create innovative blockchain solutions and decentralized applications (DApps). Expertise in front-end and back-end development evidenced by projects like BIMA and Bitcross, with skills in JavaScript, React JS, Node.js, and database management. Adept in building robust smart contracts on various blockchains such as EVM, Solana, and Arch Network, having contributed to key projects including Bitflow, Nimbus, and Trustbet. A solid computer science foundation from Rajiv Gandhi Technical University bolsters a career marked by technical proficiency and readiness for team collaboration as well as independent work. Proven track record of leveraging full-stack development capabilities and deep blockchain knowledge to meet and exceed project requirements.

Expert Full-stack Developer with advanced capabilities in TypeScript, React/Next.js, and Node.js. Possesses a Bachelor's in Computer Science and has taken specialized courses in Full-stack development and blockchain technologies, reflecting a commitment to continual learning. Proven track record in building and scaling high-load applications, particularly in the healthcare, media, and decentralized tech sectors. Demonstrates strength in creating responsive UIs, implementing complex back-ends, and ensuring high code quality through rigorous testing. Technical skill set includes modern JavaScript frameworks, RESTful and GraphQL APIs, microservices, and cloud services (AWS, GCP), supplemented by practical knowledge of SQL/NoSQL databases, Docker, and CI/CD pipelines. Fluent in essential industry practices and proficient in English and several other languages, making for a versatile asset in international and cross-functional teams.

I am a seasoned blockchain developer with proven experience in building, optimizing, and scaling projects across multiple layers and ecosystems. Beyond development, I also bring strategic connections and marketing expertise to help projects succeed from launch to adoption.

A well-rounded software engineer with a National Diploma in IT and diverse experience across several tech domains. Engineer possesses expertise in a range of programming languages like Dart (Flutter), Java, C#, and PL/SQL, and is also proficient in data automation tools including Power BI, Tableau, and VBA. They have a proven track record in database administration, test automation, and system integration, demonstrated by their work with enterprise clients and contributions to national innovation projects. Notably, the engineer has developed AI-powered platforms and fintech solutions, showing a commitment to innovation and problem-solving. Their methodologies include Agile and SDLC, ensuring efficient and effective project execution. With certifications in modern frameworks and technologies like Hashgraph and BDD testing, the engineer's technical acumen is well-established.

Dynamic Senior Blockchain Developer with over 8 years of experience in building and deploying enterprise-grade blockchain applications. Proficient in Solidity and Rust, expertly crafted DeFi protocols managing $75M+ TVL and facilitated $100M+ in cross-chain volume. Proven leadership in guiding engineering teams to deliver high-performance technologies such as a network bridge for Solana-Ethereum interoperability and Cosmos SDK chains. Innovated within the blockchain space by implementing TSS/MPC for secure transactions, designing advanced Layer 2 scaling solutions, developing DEX platforms, and ensuring system robustness through comprehensive DevOps practices. Educated in Computer Science from Sonoma State University, this engineer brings a wealth of knowledge in blockchain frameworks and protocols, programming languages including Solidity, Rust, and Go, as well as cloud infrastructures like AWS/GCP, underpinned by a command of software development methodologies.

Software engineer with a strong focus on AI integration and full-stack web solutions. A proven track record in building AI-powered tools and automating core processes, coupled with expertise in cross-platform development and containerization. Extensive experience with Python, Docker/Nginx, and deploying reliable APIs. Actively pursuing a Bachelor's in Computer Science and excelling in hands-on roles such as Software Research Engineer. Achievements include reducing log review time by 70% and improving customer agents' response rate from 45% to 85%. Adept in languages like C/C++, JavaScript/TypeScript, and possesses advanced skills in frameworks like Django and ReactJS.

Software engineer with specialized expertise in Flutter development for multi-platform applications. Experienced in leading cross-functional teams and optimizing app performance, with hands-on experience in architecture and advanced project management systems. Technical proficiency in Dart, along with familiarity in C++, JavaScript, TypeScript, and a variety of Flutter frameworks and architectures. Proven record in developing high-traffic, secure applications with a focus on user experience, contributing to substantial growth rates in user base and sales. Strong foundation in computer science with a biotechnology and pharmacy degree, underpinned by effective problem-solving skills showcased through the completion of 200+ Leetcode problems.

Seasoned Product Manager and former Research Staff with extensive IT experience, specializing in accessibility and adept in modern programming languages and tools. Notable for leading the development of assistive technology products and contributing to inclusive technology initiatives. Proven experience in API optimization, problem-solving in server-client communication, and enhancing application security using Azure Key Vault. Strong educational foundation with a Bachelor of Engineering in Computer Science and an MBA in Systems. Recognized for technical leadership, strategic project management, and analytical prowess in high-stakes environments.

- 7+ years of experience building scalable Web3 applications and DeFi platforms with Solidity, Rust, and Java in Blockchain, DeFi, NFT Tokenization, Fin-Tech domains - Strong expertise in smart contract development across Ethereum, Polygon, Solana, and Hedera, using ERC standards, Anchor, and Foundry - Designed and optimized zero-knowledge circuits (ZKPs) and decentralized identity systems (DID) for privacy-preserving applications - Integrated oracle networks (Chainlink, Pyth) and implemented advanced DeFi mechanics: yield farming, auto-compounding, AMMs, and on-chain governance - Developed secure and gas-efficient smart contracts using EIP-712, proxy patterns, and off-chain signature schemes - Built robust backend and API layers (Node.js, Java, GraphQL) with optimized database performance in PostgreSQL and MongoDB - Delivered full-stack dApps with seamless wallet integration (MetaMask, WalletConnect, HashPack) and deployed them on Vercel / AWS - Contributed to CI/CD, testing, and code quality using Hardhat, Slither, TestContainers, Jenkins, and GitHub Actions

- Blockchain Developer with 5 years of experience building decentralized applications (dApps) using Solidity and Rust across EVM-compatible chains (Polygon, BSC, Base) and Solana. - Proficient in frameworks such as HardHat and Anchor for developing, testing, and deploying smart contracts, with hands-on experience integrating wallets like MetaMask and working with DeFi protocols including Uniswap, Aave, and Alpaca Finance. - Experienced in implementing and customizing token standards such as ERC-20, ERC-721, ERC-721A, and ERC-1155, as well as secure signing mechanisms via EIP-712. - Skilled in smart contract auditing and fuzz testing using tools like Slither, Mythril, and RustSec, ensuring robust and secure codebases. - Adept in version control and collaboration using Git and GitHub, with a focus on maintainable and testable code. - Experienced in blockchain data indexing and integration using The Graph/Subgraphs, enabling efficient access to on-chain data across applications. - Well-versed in cross-chain development and decentralized identity (DID), contributing to secure, scalable, and user-centric Web3 ecosystems.

- Blockchain Developer with a 5-year background in financial technologies, specializing in Crypto, De-Fi, and NFT domains. - Exhibits proficiency in several programming languages, including Solidity, Rust, JavaScript, and TypeScript. - Key technical experience encompasses Ethereum, Solana, IPFS, and advanced blockchain development tools and practices. - Has experience in smart contract architecture design, blockchain integration, and secure transaction implementation across multiple projects, such as decentralized gaming platforms, NFT collections, and crypto exchanges. - Demonstrated capabilities in both backend technologies (Node.js, Express.js) and cloud infrastructures (AWS suite) - Upper-Intermediate English

- Seasoned FPGA and embedded systems engineer with 10+ years of experience, and a track record of architecting and implementing complex hardware and software solutions; - Expert knowledge in VHDL, FPGA, CPLD, MCU, and SoC development, with proficiency in tools like Intel(Altera), Xilinx, and Modelsim; - Strong expertise in cryptographic acceleration, RADAR systems, digital signal processing, and PCB design; - Experience in leading a development team for a cryptography acceleration project and implementing advanced algorithms in various domains; - Robust background in electronic device development and embedded programming in C and Python.

Organized, collaborative and highly skilled full stack & blockchain developer with 8+ years of professional experience in dynamic and deadline-driven work environments. Self-motivated and self-taught professional who always trends to challenge difficult problems no one dares to try. The following skills can cover your project? - Blockchain (Solidity, Web3.js, Ethers.js) - JS frontend frameworks (React, Vue, Angular, Next, Nuxt, Gatsby) - Backend skills (Laravel, Express, Django, .NET) - Other (GraphQL, Shopify, AWS, Firebase, Google APIs, Typescript) If so, your project is already 99.99% done. The only thing left is to hire me and wait for the perfect result drinking coffee ~_~

Software engineer with 9+ years of experience, excelling in full stack development with expertise in JavaScript, Swift, and iOS development. Proven track record of leading successful projects, including winning multiple hackathons and developing robust blockchain-based solutions. Demonstrates strong technical leadership, having managed diverse engineering teams and fostering agile best practices. Well-versed in various technologies like Node.js, React.js, Firebase services, Ethers.js, Web3.js, and AWS, with a solid foundation in computer science from Universidad Nacional del Nordeste. The engineer's proficiency in building scalable systems for music streaming, live video monitoring, and blockchain integration positions them as a valuable asset to any team seeking deep technical expertise and innovative solutions.

- React/React Native Engineer with almost 6 years of professional experience - Experience with Amazon/Amplify/S3/Code push - Successfully developed both iOS and Android applications using React Native - Developing React/React Native apps that interface with Restful APIs - Experience with React/Redux/Third-Party API Integrations - Experience with GraphQL/Apollo - Upper Intermediate English - Available ASAP