Staff Backend Engineer: Security & APIs (Barcelona) Equity

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. J-18808-Ljb…