Backend Developer

Talent Connect
Municipality of Madrid, Spain
10 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English, Spanish
Experience level
Intermediate

Job location

Remote
Municipality of Madrid, Spain

Tech stack

Java
API
Amazon Web Services (AWS)
Unit Testing
Cloud Computing
Cloud Engineering
Software Quality
Continuous Integration
DevOps
Hibernate
Java Persistence API
JUnit
PostgreSQL
Microsoft Dynamics
Open Data Protocol
Mockito
Systems Integration
Management of Software Versions
Spring-boot
AWS Lambda
Backend
Event Driven Architecture
Integration Tests
Kafka
REST
Amazon Web Services (AWS)
Domain Driven Design
Software Version Control
Serverless Computing
Microservices

Job description

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, 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.

Requirements

  • +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

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