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Senior Backend Engineer – Fintech Core Systems

E-Frontiers · Madrid

Hybrid Senior 🇬🇧 English
Python Integration Monitoring Alerting Microservices

Job description

About the role

We are partnering with a fast‑growing international fintech to strengthen its core systems team. As a Senior Backend Engineer you will own the development and evolution of the multi‑currency accounting and foreign‑exchange platform that underpins the product.

Key responsibilities

  • Develop and maintain scalable, reliable backend services that support key financial operations.
  • Design new micro‑services and improve existing ones, including legacy components.
  • Collaborate with product and engineering teams to deliver initiatives from concept to production.
  • Mentor colleagues and contribute to the technical growth of the team.
  • Take full ownership of the services you build, covering development, monitoring, and maintenance.

Required profile

  • Strong experience building complex backend systems (Python preferred, other OOP languages welcome).
  • Background in fintech, banking, or other regulated environments is highly valued.
  • Comfortable working with and refactoring legacy code.
  • Deep knowledge of APIs, integration patterns, monitoring, and alerting.
  • Excellent communication skills in English and an ownership mindset.

Required skills

  • Python
  • Object‑oriented programming (e.g., Java, C#)
  • API design and integration
  • Monitoring and alerting tools
  • Micro‑services architecture
  • Legacy code maintenance

What we offer

  • Competitive salary with performance‑based bonus
  • Private health insurance
  • Meal vouchers
  • Budget for training and certifications
  • Open‑source‑friendly culture
  • Hybrid work model – 4 days in the office, 1 day remote

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Published 3 months ago

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E-Frontiers

Madrid