Senior Java Developer
Posted Updated 20
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This position is no longer accepting applications(closed Oct 16, 2026).
Summary
Freelance senior Java engineers for a long-term, 100% remote project with a leading financial institution (Madrid). Day-to-day work centers on Java 17/21, Spring Boot, Kafka, Redis/PostgreSQL/MongoDB, AWS, and streaming microservices architectures, with a technical test and client interview in the process.
Hiring Freelance Senior Java Developers
We are looking for a Senior Java Developer to join a long-term project for a leading financial institution.
- Location: Madrid
- Remote: 100% remote
- Duration: Long-term
- English: C1+
Requirements
- 8+ years of professional experience with Java
- 3+ years working with Java 17 or 21
- Strong experience with Spring / Spring Boot
- Experience with Kafka
- Experience with Redis and PostgreSQL or MongoDB
- Strong testing experience with JUnit 5 and Mockito
- Experience with AWS or equivalent cloud environments
- Knowledge of streaming and microservices architectures
Nice to have
- Experience leading complex migrations or refactoring xqysrnh projects
- Multimodule Java applications
- Docker / containerization and multi-architecture images
- Python knowledge
Technical test: Yes
Client interview: Yes