We’re hiring
4 Backend Engineers (Mid, Senior, and Staff levels)
to join a high-impact
API Platform team
building scalable, self-serve infrastructure used by both customers and internal product teams.

This is a rare opportunity to join a
fast-growing fintech environment
where the API is a
top business priority
and sits at the core of the company’s platform modernisation strategy.

? Location

Madrid (Hybrid:
4 days in office / 1 day remote
)

? Salary

€40K – €90K + bonus + benefits (depending on experience level: Mid / Senior / Staff)

? About the team

You’ll join an
API Platform team
focused on:
- Building a
modern, scalable API surface
used by external clients and internal teams
- Creating
self-service capabilities
, including instant API credential provisioning
- Launching and expanding a
new API sandbox environment for clients
- Improving
performance, observability, reliability, and developer experience
- Building foundations for
AI-driven workflows via API integrations (MCP / agentic interfaces)




- Supporting platform modernization and service decomposition at scale

The API is evolving into a
product in itself
, with strong visibility across engineering and the business.

?️ Tech environment

You don’t need to know everything, but experience in similar ecosystems is key:
- Backend:
Python, Django, REST APIs
- Data:
PostgreSQL, Redis
- Infrastructure:
AWS, Docker, Kubernetes, Terraform
- Identity / access: IAM concepts (Keycloak or similar is a plus)
- Strong engineering fundamentals: system design, OOP + functional design, clean architecture
- CI/CD, observability, monitoring, and production ownership mindset

? What you’ll do

Depending on your level, you will:
- Design and build scalable backend services and APIs
- Own services end-to-end (“you build it, you run it”)
- Contribute to architecture decisions via RFC process
- Improve platform reliability, latency, and developer experience
- Mentor more junior engineers (Senior+ levels)
- Help shape a modern p

📌 Backend / API Engineers (Mid to Staff level) – Fintech Platform (Madrid / Hybrid)
🏢 E-Frontiers
📍 Madrid