Summary: Join a fast-growing international SaaS company as a Senior Software Engineer, focusing on backend development with high ownership and real impact. Highlights: 1. Backend-focused role with high ownership and real impact 2. Opportunity to help shape a brand-new Barcelona engineering hub 3. Strong product-driven engineering culture Descripción Q\-tech is colaborating with a fast\-growing **international SaaS 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. **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 * Flexible 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. Requisitos básicos **What you’ll work on** * End\-to\-end ownership of backend initiatives * High\-performance APIs, integrations and access control systems * Security, permissions and data privacy at scale * Close collaboration with Product \& Design in small, autonomous teams **Tech stack** Ruby on Rails · PostgreSQL · Redis · AWS · Kubernetes (Some TypeScript \& React exposure, but backend is the core focus) 70\.000€ \- 80\.000€ Barcelona Híbrido **Persona de contacto:** cmartinez@q\-techrec.com 669 774 446