AI Full-Stack Engineer — Remote & Flexible Hours

MAU; España; Presencial; EUR 60.000 - 90.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

High-Impact Role

Modern Technology

Growth & Learning

Stability & Vision

Collaborative Culture

Descripción de la vacante

Leadtech is seeking a Full-Stack Developer to build and scale AI products with a modern Next.js frontend and NestJS backend. You’ll own features end-to-end, work with a ship-fast mindset, and contribute to a curated tech stack.

Remote or Barcelona office options, with a focus on data-driven decisions and AI-powered experiences. You’ll collaborate with AI product managers, implement features, and push back on complexity when simple solutions exist, while maintaining cloud infrastructure and

Formación

• Proficient in TypeScript across frontend (React/Next.js) and backend (Node.js/NestJS).
• Strong React/Next.js (App Router), Server Components, routing, streaming, i18n, data-fetching patterns.
• Experience building production REST APIs with NestJS or similar frameworks.
• Experience with PostgreSQL and Prisma; writing migrations and evolving schemas.
• Deep experience integrating third-party SDKs (webhooks, retries, idempotency).
• Practical problem-solving, collaborative, and data-driven decision making.
• Passion for AI and proactive tooling; creative, self-learning attitude.

Responsabilidades

• Develop and maintain features on Next.js frontend with TypeScript and i18n support.
• Design and implement RESTful APIs with NestJS for authentication, billing, and AI workflows.
• Own backend services from schema design to deployment and observability.
• Integrate third-party SDKs for payments, analytics, and messaging.
• Build AI agents/tools using Claude SDK and MCP for real-time data access.
• Collaborate on Prisma/PostgreSQL schemas and migrations; ensure safe evolution.

Conocimientos

TypeScript

React

Next.js

Node.js

NestJS

REST APIs

i18n

PostgreSQL

Prisma

AI interest

Herramientas

SWR

Tailwind

Claude SDK

MCP

Prisma

PostgreSQL

Descripción del empleo

Leadtech is seeking a Full-Stack Developer to build and scale AI products with a modern Next.js frontend and NestJS backend. You’ll own features end-to-end, work with a ship-fast mindset, and contribute to a curated tech stack.

Remote or Barcelona office options, with a focus on data-driven decisions and AI-powered experiences. You’ll collaborate with AI product managers, implement features, and push back on complexity when simple solutions exist, while maintaining cloud infrastructure and