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Build the Web2 frontend from scratch using React/Next.js and TypeScript, then integrate Web3 features for Pet360’s blockchain-based pet ecosystem in Brazil.
Senior blockchain developer building Web3 apps with Ethereum/Solana/Solidity smart contracts and modern JS/TS stacks for fast-paced startups.
Senior full-stack developer matching with startups; builds web apps using Python, React, and cloud platforms (AWS/GCP/Azure) in a remote, client-facing marketplace role.
Build and secure Ethereum smart contracts, optimize blockchain services, and maintain CI/CD pipelines for a fast-growing Canadian crypto exchange.
Builds and integrates Web3 components for Citi’s digital asset platform using Java, Solidity, and blockchain protocols like Ethereum and Hyperledger Besu.
Build and integrate Web3 components for Citi’s digital asset platform, including smart contracts, blockchain protocol connectors, and on-chain event listeners using Java/Spring and Web3 libraries.
Aster is a next-generation decentralized perpetual exchange dedicated to delivering a seamless, powerful, and truly decentralized on-chain derivatives trading experience. From one-click trading to smart automation and…
Build and maintain a multi-chain DEX data analytics and trading platform using React/TypeScript, collaborating with backend teams to deliver DeFi infrastructure for on-chain trading.
Build and maintain Web3 frontends using Next.js, React, and Vercel, integrating blockchain interactions and wallet connections for a universal app layer across thousands of chains.
Lead frontend engineering for OKX’s core crypto verticals (trading, Web3, payments), balancing business goals, security, and AI-driven product innovation across high-concurrency environments.
Build and maintain a Web3 streaming platform: React/Vue3 frontends with multi-wallet login, Node.js middleware for on-chain video metadata, and Solidity smart contracts for NFT trading pools and ERC-4337 wallets.
Build web apps and NFT marketplace features using React.js, optimize performance, and develop back-end systems for NFT minting projects.
Build full-stack web apps that blend Web3/crypto (smart contracts, dApps) with AI features, using React/Next.js, Node.js/Python, and libraries like Ethers.js and LangChain.
Build full-stack web apps integrating Web3/crypto and AI, using React/Next.js, Node.js/Python, and smart contracts; connect UIs to blockchain protocols and LLM APIs.
Builds and maintains backend services for crypto trading and blockchain integrations using Python, FastAPI/Flask, and SQL.
Lead a cross-platform mobile and full-stack team building scalable fintech and AI-driven apps with React Native, Node.js, AWS Serverless, and Web3 integrations.
Builds and maintains backend services for Web3 applications using Go, integrates with blockchain networks, and develops smart contracts in Solidity.
Build Web3 and mobile apps using React Native, integrating blockchain features like smart contracts (Solidity, Web3.js, ethers.js).
Senior Backend Engineer building scalable DeFi APIs and blockchain integrations for a fintech startup, using Node.js, TypeScript, MongoDB, Redis, and Stellar network tools.
Builds secure, scalable React/TypeScript front-ends for a Web3/crypto app, integrating wallets and handling client-side blockchain transactions.
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