Fullstack Blockchain Developer

About the job

What you‘ll be doing: • 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. What we look for in you: • 3+ years of full-stack engineering experience, with 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 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.

Requirements

• React
• Next.js
• NestJS
• TypeScript
• Solidity

Preferred Technologies

• React
• Next.js
• NestJS
• TypeScript
• Solidity

About the company

InfraSingularity aims to revolutionize the Web3 ecosystem as a pioneering investor and builder. Our long-term vision is to establish ourselves as the first-of-its-kind in this domain, spearheading the investment and infrastructure development for top web3 protocols.