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# Senior Java / Kotlin Engineer

- **Company:** PIXIE
- **Location:** Arbo, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Amazon Web Services, Junit, Python (Programming Language), PostgreSQL, MongoDB, Redis, Mockito, Data Streaming, Java Application Server, Cloud Platform System, Spring-boot, Kotlin, Containerization, Apache Kafka, Code Restructuring, Docker, Microservices
- **Published:** September 20, 2026
- **Apply:** https://www.buscojobs.com.es/senior-java-kotlin-engineer-en-arbo-ID-371969658

## About the Role

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 projects Multimodule Java applications Docker / containerization and multi-architecture images Python knowledge Technical test: Yes Client interview: Yes If you are interested do not hesitate to send me your most updated CV al ******

## Description

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 projects Multimodule Java applications Docker / containerization and multi-architecture images Python knowledge Technical test: Yes Client interview: Yes If you are interested do not hesitate to send me your most updated CV al ******