Back End Engineer

Senior Back End Engineer (Java/Spring Boot)

📍 Location : Luxembourg

📆 Start date : ASAP - full time

🌍 Languages : Fluent English mandatory (French is a plus)

We are looking for a Senior Back End Engineer to join a Squad Team of 6–9 experts building a brand-new application in the financial sector.

You will work in a collaborative Agile environment alongside tech leads, business analysts, developers and testers to design, develop and deliver modern, scalable applications deployed in containerized environments (on-premise and cloud).

Your Responsibilities

• Develop, maintain and deploy backend applications and services using Java and Spring Boot
• Design and implement REST and SOAP APIs
• Build microservices and event-driven architectures (Kafka)
• Ensure code quality through unit testing and best development practices
• Contribute to CI/CD pipelines and DevOps practices
• Collaborate with cross-functional teams to translate business requirements into technical solutions

Tech Stack

• Java 17 (preferably 21+)
• Spring Framework 6.x / Spring Boot 3.x
• JPA / Hibernate
• Kafka
• JUnit / TestNG, Mockito
• Maven, Git
• Docker & containerized environments
• CI/CD pipelines (preferably Azure DevOps)
• Cloud platforms (preferably Azure)
• OIDC / OAuth authentication

Nice to Have

• Integration technologies (Apache Camel or Spring Integration)
• Experience with microservices architectures
• Workflow engines (e.g. Temporal)

💡 Why join?

• Work on a new strategic project in the financial sector
• Be part of a small, highly skilled squad
• Use modern technologies and cloud environments
• Have real impact on architecture and product development