Q-tech is colaborating with a fast-growing international Saa S company that is opening a new engineering hub in Barcelona and is looking for a Senior Software Engineer. This is a backend-focused role with high ownership and real impact, working on Identity & Access Management, APIs and integrations for a platform used by some of the most demanding customers in the private capital space. We are seeking experienced developers who would like to work in Ruby on Rails (not previous experience required). YOU MUST HAVE: Expertise in OAuth 2.0 What you'll work on Design, build and iterate on backend-heavy systems across IAM, APIs, internal and external integrations, ensuring security, privacy and reliability at scale. Deliver features end-to-end, from design through deployment and monitoring. Drive system reliability, performance and maintainability. Tech stack Ruby on Rails · Postgre SQL · Redis · AWS · Kubernetes(Some Type Script & React exposure, but backend is the core focus) The team~65 engineers globally,



distributed across North America Strong product-driven engineering culture High ownership, low bureaucracy, real-world impact Opportunity to help shape a brand-new Barcelona engineering hub Location & setup Permanent contract Hybrid model: 3 days per week remote Versátil working hours Equity package included (4-year vesting, 1-year cliff)23 days of paid annual leave Private health insurance with Adeslas (family included)€50/month phone & home internet allowance€50/month public transport allowance€60/month gym & wellness allowance€500/year professional development budget Collaboration with distributed teams across Europe and North America If you're a senior backend engineer who enjoys building secure, scalable systems and wants to be involved early in a new team, this could be a great next step.

📌 Senior Engineer (Madrid)
🏢 Q-Tech
📍 Madrid