Hire Blockchain and Cryptography Developer

• 15+ years of commercial software development experience • Solid knowledge of Solidity, C++, JavaScript, TypeScript; • Deep understanding of blockchain architecture and smart contract logic; • Cosmos, Tron, Avalanche, Binance Smart Chain, Ethereum dApps; • Strong skills in developing NFT smart contracts. Support and payload verification; • NFT Marketplaces (ERC - 721/1155), Crypto Payment Solutions & DeFi Cross Chain Bridges - ERC-20 Tokens, ICO, DEX, Staking, Swapping; • Highly qualified knowledge of Stripe payment system integration to blockchain data; • 10+ years experience working with Python; • 5 years experience working with Node.js; • Strong abilities with Express; • Experience working with Docker, and Kubernetes (K8s); • 3+ years of development experience with React.js. • No scheduled vacations within the next 3 months;

- 5+ years of experience as a Front-end JavaScript Developer; - 5+ years of experience in React.js; - Proficient in Solana Blockchain operations, including managing deposits, executing transfers, creating Phantom wallets, and handling contract call interactions; - Strong abilities working with Web3; - Deep experience in Next.js technology; - Experience with WebRTC, Soket.io; - Good knowledge of Tailwind CSS, Bootstrap, and Chakra UI; - Experience working with Redux, and Docker; - Familiar with Node.js; - Proficiency in testing frameworks like Jest and Cypress; - E-commerce, web, and mobile applications, including learning platforms, chatbots, dApps, and cryptocurrency wallet extensions.

- Strong background in computer engineering and automation; - 5+ years of experience with Python; - Good knowledge of the blockchain industry and web3 project development; - Proven expertise in developing mobile applications, crafting solutions for crypto services, and creating telegram mini-apps; - Skilled in web automation, bot development, parsing, and working with web3 technologies.

- 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

- 10+ years experience as a Full-Stack Developer with of developing robust web applications and services, including extensive experience in both frontend and backend technologies; - Technical proficiency with PHP and MySQL for server-side development, advanced JavaScript utilization on the client side; - Strong abilities with blockchain technology engagement, including smart contracts and wallet development using Solidity, Hardhat, Truffle, WalletConnect, and Metamask SDK; - Experienced with libraries Web3.js, and Ethers.js; - Ability to work Ethereum Blockchain, Binance Smart Chain (BSC), with different wallets including MetaMask; - Adept at working with a variety of frameworks and languages beyond core competencies, such as Laravel, Solidity, Node.js, and C++; - Up-to-date with modern practices, possessing comprehensive experience in codebase upgrades, performance optimization, and integrating third-party APIs; - Successfully led a development team, demonstrating strong leadership and project estimation skills.

- Team Lead / Tech Lead / Software Engineer / Blockchain Developer with 10 years of experience. - Strong expertise in blockchain development, building decentralized applications (dApps) using Solidity and Rust for EVM and Solana networks. - Proficient in frameworks like HardHat and Anchor. - Develop, test, and deploy smart contracts, integrating wallets (e.g., Metamask) and working with DeFi protocols (Uniswap, Aave) and NFT standards (ERC-20, ERC-721). - Has solid experience in backend development using Django, FastAPI, and SQLAlchemy for scalable APIs and microservices. - Familiar with CI/CD automation (e.g., GitLab CI/CD, GitHub Actions) and cloud infrastructure on AWS (Lambda, EKS, RDS). - Skilled in integrating blockchain technologies with backend systems, ensuring code quality through unit testing, fuzz testing, and security audits with tools like RustSec and Slither.

- Certified Senior Go Engineer ( 12 years with Go, 19 years in Software Engineering) with experience in software engineer, team lead and software architect roles. - Master’s Degree in Computer Science - Designed and implemented a scalable multi-microservice backend for an enterprise AdTech CRM, integrating 10+ third-party services and streamlining client management operations. - Built and deployed a billing system for a money exchange platform, integrating third-party payment systems and delivering a user-friendly web interface for seamless transactions. - Optimized data processing pipelines by implementing quantiles on streams, enabling real-time analytics and supporting large-scale data operations for scientists and business stakeholders. - Extensive background in data processing and reporting.

- Full-Stack Engineer with over 8 years of experience specializing in Web2 and Web3 technologies, blockchain development, and Full-Stack architecture. - Has 4 years of experience working with web3, implementing blockchain solutions using Ethereum, Solana, and smart contracts. - Proven expertise in tokenization, NFT integration, and cryptocurrency transactions for real estate, voluntary donation, and other industries. - Expertise in Node JS, Nest JS, and RESTful APIs, with proficiency in React JS for frontend development. - Strong experience with databases like PostgreSQL, Redis, MongoDB, and DynamoDB. - Well-versed in cloud services, including AWS and GCP, and experienced in container orchestration with Kubernetes. - Proficient in CI/CD using Jenkins, GitHub Actions, Bitbucket Pipelines, and Terraform. - Familiar with Nginx for web server management and ensuring smooth application deployments.