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# Staff Backend Engineer: Security & APIs (Barcelona) Equity

- **Company:** Q Tech
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Software as a Service, Identity and Access Management, OAuth, Ruby on Rails, Systems Integration, Backend
- **Published:** October 26, 2026
- **Apply:** https://www.jobleads.com/es/job/staff-backend-engineer-security-apis-barcelona-equity--barcelona--e069906ab7ab6864aa5c5119de7c87533

## About the Role

Experience in Ruby on Rails is welcome, with a core focus on OAuth 2.0 and security leadership. You'll work on IAM, APIs, and integrations, and participate in architecture discussions with global engineers.

## Description

Q-tech partners with a fast-growing international SaaS company opening a new engineering hub in Barcelona. The Staff Engineer role is backend-focused with high ownership, shaping security management, APIs, and integrations for a platform used by demanding private capital clients.

Experience in Ruby on Rails is welcome, with a core focus on OAuth 2.0 and security leadership. You'll work on IAM, APIs, and integrations, and participate in architecture discussions with global engineers.