AI-Driven Full-Stack Engineer — Own Production-Grade Products

Leyton; Sant Cugat del Vallès; On-site; EUR 50,000 - 80,000; Full time

Job summary

Leyton in Barcelona seeks a Full-Stack Engineer to join a growing team building AI-native software for professional services. You will own end-to-end delivery, shaping architecture and quality across multiple products.

Expect to collaborate with product owners, navigate varied domains, and contribute to production-grade systems used across Europe. You will work at the intersection of frontend and backend, leveraging TypeScript and AI tooling to accelerate development while maintaining solid

Qualifications

• University degree in computer science or related field.
• Experience building production web applications frontend and backend.
• Interest in AI agents and related tooling is welcome.

Responsibilities

• Own product architecture, implementation and release lifecycle.
• Collaborate with Product Owner to align business needs and tech delivery.
• Move across multiple projects, maintaining high quality and speed.
• Design software with a strong emphasis on maintainability and AI integration.
• Mentor juniors and contribute to engineering culture.

Skills

Full-stack

TypeScript

AI agents

Web apps

Education

Bachelor's degree

Tools

Claude Code

Cursor

Codex

Playwright

Job description

Leyton in Barcelona seeks a Full-Stack Engineer to join a growing team building AI-native software for professional services. You will own end-to-end delivery, shaping architecture and quality across multiple products.

Expect to collaborate with product owners, navigate varied domains, and contribute to production-grade systems used across Europe. You will work at the intersection of frontend and backend, leveraging TypeScript and AI tooling to accelerate development while maintaining solid