> Markdown version of [/jobs/ext/3013537-senior-java-kotlin-engineer](https://www.wearedevelopers.com/jobs/ext/3013537-senior-java-kotlin-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Java / Kotlin Engineer - **Company:** Pixie - **Location:** Murcia, 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, Apache Kafka, Code Restructuring, Docker, Microservices - **Published:** September 20, 2026 - **Apply:** https://www.buscojobs.com.es/senior-java-kotlin-engineer-en-murcia-ID-371897995 ## 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 T echnical 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 T echnical test: Yes Client interview: Yes If you are interested do not hesitate to send me your most updated CV al ## Related Videos - [Application Modernization and Rabbits](https://www.wearedevelopers.com/videos/120-application-modernization-and-rabbits) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [How Unit Testing Saved My Career](https://www.wearedevelopers.com/videos/1642-how-unit-testing-saved-my-career) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) - [Accelerating Authentication Architecture: Taking Passwordless to the Next Level](https://www.wearedevelopers.com/videos/733-accelerating-authentication-architecture-taking-passwordless-to-the-next-level) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)