Software Engineering & Consulting
Backend systems.
Built to last.
Rat Labs builds robust backend infrastructure — distributed services, cloud systems, APIs, and developer tooling. Senior engineering quality, without the overhead.
What we build
Backend Systems
High-performance APIs, event-driven services, and real-time systems. Designed for reliability and built to scale without drama.
Cloud Infrastructure
Kubernetes, AWS, and GCP. Infrastructure that scales predictably and doesn't wake you up at 3am. Observability built in from the start.
Developer Tooling
CLIs, SDKs, internal platforms, and automation pipelines. Tools that engineers actually want to use — fast, composable, well-documented.
About
Senior engineering.
Focused delivery.
Rat Labs is a software engineering firm based in Castellón de la Plana, Spain. Our team brings 15+ years of production experience across fintech, SaaS, and developer platforms.
We focus on technical leadership and hands-on engineering: architecture, backend development, distributed systems, and the cloud infrastructure that teams depend on. Available for contracts and longer-term engagements.
Get in touch →
Have a project in mind?
Reach out — we'd love to talk through what you're building.