Blockchain Full Stack Engineer Fintech Labs

## Your Responsibilities Implement wallet and transaction features that enable stablecoin payments, cross-chain bridging, and programmable flows. Integrate third-party wallet SDKs and APIs from key partners like Crossmint to support onboarding, compliance flows, and seamless fiat on/off ramps. Develop robust backend infrastructure and services to enable secure transaction execution, smart contract interactions, and vault access. Collaborate closely with smart contract engineers to connect on-chain logic with performant backend and frontend systems. Work side-by-side with frontend engineers to deliver secure, fast, and delightful user experiences. Contribute to architectural decisions that prioritize scalability, security, code quality, and system reliability across the stack. ## What You’ll Need 4+ years of full stack engineering experience, ideally in crypto, fintech, or API-intensive environments. Strong proficiency with modern TypeScript and frameworks such as Node.js, NestJS, or similar. Hands-on experience integrating third-party SDKs (wallets, bridges, KYC tools) into production-grade systems. Solid understanding of Ethereum and EVM-compatible smart contracts and how to interact with them via backend/frontend code. Familiarity with secure key management systems, vault integrations, or encrypted storage solutions. Proven ability to ship clean, maintainable, production-ready code in a fast-paced, collaborative setting.

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