Senior AI Engineer, API & Integrations Platform

Factorial Hr; Barcelona; Presencial; EUR 90.000 - 120.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Private health insurance

Wellhub fitness access

Cobee

Language classes

Breakfast in office

Descripción de la vacante

Factorial is seeking a Staff AI Engineer for the API & Integrations Team in Barcelona to own systems end-to-end—from problem definition and design to shipping, monitoring, and iteration in production.

You will collaborate with Product and Design to shape the API and integrations framework, ensuring a consistent user and developer experience across ATS, payroll, and ERPs.

We value development maturity, production-grade code, and a hands-on interest in AI, LLMs, and evolving agentic workflows.

Formación

• Solid software engineering fundamentals and maturity; able to own a system end-to-end.
• Proven track record shipping real products to production.
• Comfort designing and working with APIs, cloud platforms, and system design.

Responsabilidades

• Own systems end-to-end from design to production release and monitoring.
• Collaborate with Product and Design to shape API and integrations framework.
• Maintain consistency of user and integration experience across ATS, payroll, ERPs, and other modules.
• Mentor peers and contribute to engineering best practices.
• Define and shape AI roadmap elements, including AI skills and agentic workflows.

Conocimientos

Software engineering

Production shipping

APIs

AI protocols

Herramientas

Ruby on Rails

React

APIs

Cloud platforms

Descripción del empleo

Factorial is seeking a Staff AI Engineer for the API & Integrations Team in Barcelona to own systems end-to-end—from problem definition and design to shipping, monitoring, and iteration in production.

You will collaborate with Product and Design to shape the API and integrations framework, ensuring a consistent user and developer experience across ATS, payroll, and ERPs.

We value development maturity, production-grade code, and a hands-on interest in AI, LLMs, and evolving agentic workflows.