Senior Java & React Developer – Modern Stack | €400/day Remote EU + Luxembourg Onsite (1 week/month)

Are you a seasoned Java Developer with a passion for modern tech and flexible working? We’re looking for a contractor with strong Java and React experience to support the development of key trading interface systems within a highly regulated financial environment.

Join a forward-thinking project running through to April, with a tech stack that includes Java 17, Spring Boot 3, ReactJS, REST APIs, Kafka, and Azure DevOps.

What you’ll do:

Design and implement new UI features in React
Connect the frontend with both REST APIs and Kafka-based endpoints
Write and run behavioural test cases to meet strict pre-trade compliance rules
Align regularly with business teams to refine requirements
Contribute to repeatable, automated setups and robust documentation

What we’re looking for:

10+ years of Java development experience in corporate environments
Solid experience with Agile, CI/CD, and DevSecOps practices
Comfortable with REST, Kafka, and UI-backend integration
Strong English skills and a Master’s in STEM (or equivalent professional experience)

Nice to have:

Java 17, Spring Boot 3, ReactJS, Azure DevOps, relational databases

Contract Details:

Up to 200 person-days until April
Remote from within the EU with 1 week/month onsite in Luxembourg
€400/day for remote; onsite full-time rate negotiable

You’ll be working with a highly skilled team on a project that demands precision, modern engineering practices, and collaboration.

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Software Engineer