Backend Developer (Java / Spring Boot / AWS) - Spain (Hybrid/Remote)

Backend Developer (Java / Spring Boot / AWS) - Assisted Channels

Spain | Hybrid in Madrid, Barcelona, Málaga or Logroño | Remote in the rest of the country

Full-time

About The Role

We are looking for experienced Backend Developers specialized in Java and Spring Boot, with strong expertise in microservices architectures and cloud-native development in AWS environments. You will join an international digital transformation project focused on building scalable backend services, event-driven architectures, and modern API ecosystems within a high-availability environment.

This role combines backend engineering, cloud-native development, integrations, and modern architectural practices.

What you’ll do

• Design and develop scalable microservices using Java and Spring Boot
• Define and implement RESTful APIs ensuring performance, scalability, and security
• Apply clean architecture principles, including hexagonal architecture (ports & adapters)
• Develop and maintain persistence layers using PostgreSQL and JPA/Hibernate
• Build and maintain serverless components using AWS Lambda
• Contribute to event-driven architectures using AWS services such as SQS and EventBridge
• Integrate internal and external systems, including CRM platforms via OData
• Write and maintain unit and integration tests
• Collaborate with DevOps and cloud teams in AWS environments
• Follow best practices in CI/CD, version control, and code quality

What we’re looking for

• +3 years of professional experience in backend development
• Strong hands-on experience with:
  • Java
  • Spring Boot
  • Microservices architectures
• Experience designing and implementing:
  • REST APIs
  • API versioning and documentation
• Strong knowledge of:
  • PostgreSQL
  • JPA / Hibernate
• Experience with:
  • JUnit
  • Mockito
  • unit and integration testing
• Experience working in AWS environments and cloud-native architectures
• Understanding of clean architecture principles and separation of concerns
• Spanish fluent/native level
• English B2 (spoken and written) – required

Highly valued

• Experience with:
  • AWS Lambda
  • Event-driven architectures
  • Amazon SQS
  • Amazon EventBridge
  • Kafka or similar technologies
• Experience integrating with:
  • Microsoft Dynamics
  • OData protocols
• Knowledge of:
  • Hexagonal Architecture
  • Domain-Driven Design (DDD) principles

Work model

• Hybrid model available in:
  • Madrid
  • Barcelona
  • Málaga
  • Logroño
• Remote from other locations within Spain

Note

We are looking for backend-focused engineers with strong experience building modern Java microservices and cloud-native systems. This is a highly technical and hands‑on role within a collaborative engineering environment.