Senior Fullstack (Node.js + React.js)
O
OnHires
📍 , , Spain, , , Spain, Spain
Job Description
The hiring company is an independent product-based SaaS organization with a portfolio of 10+ in-house B2C digital products. The company builds and scales its own products - no outsourcing, no external clients, and no investor pressure.
About the Role
The company is seeking a Senior SDE Fullstack who will take full hands‑on ownership of backend and frontend feature development, contribute to architecture decisions, ensure performance, and maintain code quality across a modern SaaS environment.
This is a senior individual contributor role, fully hands‑on - without people‑management responsibilities.
What You’ll Do
- Build and deliver complex features end‑to‑end using Node.js, NestJS, React.js, Next.js, TypeScript.
- Design and implement scalable backend services and secure REST APIs.
- Develop performant frontend components, SSR flows, routing, and state management.
- Write clean, maintainable, well‑tested code...