Full Stack Engineer
About this role
About the Role ClassWallet is modernizing a large, business-critical fintech platform. This role will help evolve our legacy Node.js/Express + MongoDB backend and multi-generation frontend toward a cohesive modern stack (NestJS, Next.js) while preserving stability. The engineer will shape scalable architecture, write tests, and leverage AI tooling as a force multiplier. What You'll Do
- Work across the full stack — data model, API contract, UI, and production behavior — contributing to domains as they move onto the modern stack.
- Recognize bad legacy patterns and don't repeat them — read the existing Express/MongoDB and Backbone/React layers, understand where they fell short, and apply better practices in new development rather than carrying old habits forward.
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