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

Madrid🌐 Remote💼 Full-time🗓 2026-05-14 → 2026-09-23

Core

Design and develop scalable microservices, event-driven architectures, and modern API ecosystems using Java and Spring Boot in AWS environments.

Role type

Senior Backend Engineer (Java/Spring Boot)

Builds

Scalable backend services, RESTful APIs, and serverless components for an international digital transformation project.

Domain

Cloud-native backend engineering, microservices, event-driven architecture

Deliverable

production ML models | product features | infrastructure

Required skills

Java, Spring Boot, Microservices architecture, REST API design, PostgreSQL, JPA/Hibernate, Unit and integration testing (JUnit/Mockito), AWS cloud-native development, Clean architecture principles

Preferred skills

AWS Lambda, Event-driven architectures (SQS, EventBridge, Kafka), Hexagonal Architecture, Domain-Driven Design (DDD), Microsoft Dynamics integration, OData protocols

Technologies

Java, Spring Boot, PostgreSQL, JPA, Hibernate, AWS, Lambda, SQS, EventBridge, Kafka, JUnit, Mockito, OData

Responsibilities

Design and develop scalable microservices; Define and implement RESTful APIs; Develop and maintain persistence layers; Build and maintain serverless components; Integrate internal and external systems; Write and maintain unit and integration tests

Seniority

Senior, hands-on IC

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