Senior Backend Engineer - Security Subsystem (Remote/Spain)

Banco Santander SA; Madrid; Híbrido; EUR 60.000 - 90.000; Jornada completa

Descripción de la vacante

Open Digital Services, the software arm of Santander Group, is hiring a Senior Backend Engineer for the security subsystem in Madrid. You will design, implement, and operate backend services and APIs that power secure customer journeys.

Requires 4+ years in backend development (Go or Java), strong API and data structure knowledge, and experience with distributed systems and cloud tech like AWS. Spanish is preferred alongside English.

Formación

• 4+ years of backend experience in Go or Java.
• Strong knowledge of APIs, data structures, databases, testing, version control.
• Experience debugging in production environments.
• English language required; Spanish preferred.
• Experience with distributed systems, caching, asynchronous processing.
• Familiarity with AWS, Redis, DynamoDB, PostgreSQL, or event-driven architectures.

Responsabilidades

• Design, implement, test, deploy, and operate backend services and APIs used in security-critical customer journeys.
• Turn requirements into maintainable designs and incremental delivery plans with senior engineers and Team Leads.
• Write clear, well-tested code and improve automated testing, documentation, and developer workflows.
• Build observability into services using logs, metrics, and traces.
• Participate in on-call rotation, investigate incidents and root causes.
• Contribute to data modelling, caching, asynchronous processing, and performance improvements.
• Take part in design reviews and progressively own larger service areas.

Conocimientos

APIs

Data structures

Databases

Testing

Version control

Distributed systems

Caching

Asynchronous processing

Resilience

Performance

AWS

Redis

DynamoDB

PostgreSQL

Event-driven architecture

Go

Java

Git

Herramientas

Go

Java

Git

Descripción del empleo

Open Digital Services, the software arm of Santander Group, is hiring a Senior Backend Engineer for the security subsystem in Madrid. You will design, implement, and operate backend services and APIs that power secure customer journeys.

Requires 4+ years in backend development (Go or Java), strong API and data structure knowledge, and experience with distributed systems and cloud tech like AWS. Spanish is preferred alongside English.