Posted Apr 2, 2026
Key Responsibilities:
Architect and build scalable full-stack Web3 applications using React, Next.js, and NestJS with TypeScript. - Lead frontend dApp development, including wallet integrations (MetaMask, WalletConnect, Phantom, etc.), token gating, and NFT interactions. - Build backend APIs and services with NestJS (TypeScript), integrating directly with Ethereum, Layer 2s, and other blockchains. - Develop, audit, and deploy secure smart contracts in Solidity. - Design NFT marketplaces, DeFi dashboards, and FinTech dApps with smooth UX and reliable transaction flows. - Ensure security best practices across frontend, backend, and smart contracts. - Collaborate closely with product and management teams to rapidly iterate, experiment, and launch products. - Mentor other engineers on full-stack Web3 integrations and best practices. Qualifications Required:
3+ years of full-stack engineering experience, with a strong focus on React, Next.js, and NestJS in TypeScript. - Proven ability to build frontend Web3 integrations using ethers.js, web3.js, wagmi, rainbowkit, or similar libraries. - Experience in developing backend Web3 integrations: smart contract interaction services, indexers, and blockchain data APIs. - Good knowledge of Solidity and familiarity with Rust smart contracts. - Hands-on experience with NFT standards (ERC-721, ERC-1155) and DeFi protocols. - Proficiency in designing and maintaining robust backend systems with NestJS, Express, or similar. - Experience with CI/CD pipelines, Git, and agile methodologies. - Strong problem-solving skills, with a focus on performance, security, and scalability. - Clear and effective communicator who can explain complex Web3 concepts. - Ability to drive end-to-end features and work autonomously in a fast-paced startup environment. Role Overview: As a member of InfraSingularity, you will play a crucial role in revolutionizing the Web3 ecosystem as an investor and builder. Your primary focus will be on architecting and building scalable full-stack Web3 applications using technologies such as React, Next.js, and NestJS with TypeScript. By collaborating closely with product and management teams, you will contribute to the rapid iteration, experimentation, and launch of innovative products that reshape the future of finance, governance, and technology. Key Responsibilities:
Architect and build scalable full-stack Web3 applications using React, Next.js, and NestJS with TypeScript. - Lead frontend dApp development, including wallet integrations (MetaMask, WalletConnect, Phantom, etc.), token gating, and NFT interactions. - Build backend APIs and services with NestJS (TypeScript), integrating directly with Ethereum, Layer 2s, and other blockchains. - Develop, audit, and deploy secure smart contracts in Solidity. - Design NFT marketplaces, DeFi dashboards, and FinTech dApps with smooth UX and reliable transaction flows. - Ensure security best practices across frontend, backend, and smart contracts. - Collaborate closely with product and management teams to rapidly iterate, experiment, and launch products. - Mentor other engineers on full-stack Web3 integrations and best practices. Qualifications Required:
3+ years of full-stack engineering experience, with a strong focus on React, Next.js, and NestJS in TypeScript. - Proven ability to build frontend Web3 integrations using ethers.js, web3.js, wagmi, rainbowkit, or similar libraries. - Experience in developing backend Web3 integrations: smart contract interaction services, indexers, and blockchain data APIs. - Good knowledge of Solidity and familiarity with Rust smart contracts. - Hands-on experience with NFT standards (ERC-721, ERC-1155) and DeFi protocols. - Proficiency in designing and maintaining robust backend systems with NestJS, Express, or similar. - Experience with CI/CD pipelines, Git, and agile methodologies. - Strong problem-solving skills, with a focus on performance, security, and scalability. - Clear and effective communicator who can explain complex Web3 concepts. - Ability to drive end-to-end features and work autonomously in a fast-paced startup environment.
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