As part of AI-LAB as a Full-Stack Developer, you will be instrumental in building and scaling our AI products. You will own features end-to-end across a modern Next.js frontend and our NestJS backend services, delivering a seamless and powerful user experience. Develop and maintain features on our Next.js (App Router) frontend using TypeScript, SWR, Tailwind, and a component-driven design system, with full internationalization (i18n) support.
Design, implement, and maintain RESTful APIs with NestJS (TypeScript) to manage authentication, data processing, billing, usage tracking, and orchestration of AI workflows.
Own backend services end-to-end: from schema design and migrations to deployment and observability, and contribute to new services as the product surface grows.
Build AI agents and tools using the Claude SDK and Model Context Protocol (MCP) : giving LLMs real-time access to data, APIs, and tools so they can take meaningful actions on behalf of users.
Contribute to schema design with Prisma and PostgreSQL , write and review migrations,



and reason carefully about data models that evolve safely over time.
Implement and maintain feature flags , A/B experiments, and analytics events so product decisions are driven by data.
Collaborate on application deployment and help maintain our cloud infrastructure.
We are seeking a proactive and skilled developer who is passionate about building modern, AI-driven applications and who treats production code with the care it deserves.
TypeScript Proficiency: Highly proficient in TypeScript across both frontend (React/Next.js) and backend (Node.js/NestJS) environments.
Frontend Expertise: Strong experience with React and Next.js (App Router) : Server Components, route handlers, streaming, metadata, i18n, and modern data-fetching patterns (SWR or equivalent).
Backend Expertise: Solid experience building production REST APIs with NestJS (or comparable Node frameworks like Express/Fastify): modules, DI, guards, interceptors, DTO v

📌 Sviluppatore Full stack (España)
🏢 Leadtech
📍 España