Senior Product Engineer - Authentication Team

Factorial • Barcelona, Catalonia, Spain • Posted June 25, 2026

Location Barcelona, Catalonia
Job Type CDI
Category Computer Occupations
Posted June 25, 2026

Hello!


Do you want to help us redefine how AI powers the future of Business Management software, not as an add-on, but as a core part of how people work, decide and grow?


We’re looking for engineers who:



  • Treat AI as central to their craft, not a feature to bolt on later

  • Want to build and ship, not debate and document

  • Care about whether the thing they built actually worked and what is the exact value they’re adding.


Ready to be part of the challenge?


We are looking for a Product Engineer to join our CIAM (Customer Identity and Access Management) team at Factorial. You will work across the stack with a stronger focus on backend development.


You will be part of the team responsible for Authentication and Authorization at Factorial, driving a pragmatic balance between security and usab...

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