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.

We are seeking experienced developers who would like to work in Ruby on Rails (not previous experience required).

Design, build and iterate on backend-heavy systems across IAM, APIs, internal and external integrations, ensuring security, privacy and reliability at scale.

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Deliver features end-to-end,



from design through deployment and monitoring.
Drive system reliability, performance and maintainability. xkdbapo
Ruby on Rails · PostgreSQL · Redis · AWS · Kubernetes
(Some TypeScript & React exposure, but backend is the core focus)

Opportunity to help shape a brand-new Barcelona engineering hub

Permanent contract
~ Hybrid model: 3 days per week remote
~ Flexible working hours
~ Private health insurance with Adeslas (family included)
~€50/month phone & home internet allowance
~€500/year professional development budget
~ 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.

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