We are working with a product‐led company looking to hire a Senior Rails Developer to play a key role in scaling and evolving their backend systems. This is a hands‐on role with real ownership and impact across engineering and product.
The Role As a Senior Ruby on Rails Developer, you'll be instrumental in building and maintaining core systems that support a high‐scale, always‐on platform.
You'll be responsible for Developing and maintaining backend systems and internal tools
Translating business goals into scalable technical solutions
Monitoring, troubleshooting, and improving live systems (24/7 environment)
Building and enhancing CI/CD pipelines for smoother deployments
Driving improvements in architecture, performance, and scalability
Integrating and maintaining third‐party APIs
What We're Looking For 10+ years of commercial experience with Ruby on Rails
Experience working on high‐scale, production systems
Strong understanding of software design principles & best practices




Proven ability to think strategically and align tech with business goals
Ownership mindset with a proactive, problem‐solving approach
Experience working with large datasets and third‐party integrations
Nice to Have Experience with Redis, PostgreSQL, Sidekiq, Hotwire
Knowledge of mobile ad monetisation ecosystems
Strong background in unit & integration testing
Why Join Work on a high‐impact, scalable product
Join a team that values ownership and engineering excellence
Opportunity to influence architecture and technical direction
Fast‐paced environment with real product visibility
Up to €80k basic (this can be B2B in Europe)
High flexibility, full‐remote in Europe
High degree of ownership and autonomy
Being part of a small team of highly motivated and talented professionals
Please apply with an updated CV with contact details to be considered.
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📌 Senior Ruby on Rails Engineer (Madrid)
🏢 Sorcer
📍 Madrid