Application Development
Luxembourg, Walloon Region, Belgium • Posted June 03, 2026
Role Description
MY MISSION
As a Senior Backend Java Engineer, your mission will be to design, implement and maintain robust backend services within a modern microservices architecture, while ensuring high quality, security and compliance with architectural standards.
Designing and implementing RESTful microservices using Java (LTS) and Quarkus, in line with Twelve‑Factor App principles.
Developing secure, scalable and resilient backend services handling complex business processes (registrations, VAT declarations, validations, workflows, batch processing, notifications and asynchronous treatments).
Implementing backend components strictly based on functional specifications provided by business analysts (APIs, data models, business rules, validations and RFC 9457 error cases), while ensuring technical consistency and robustness.
Collaborating closely with the internal architect to ensure full alignment with defined architectural guid...
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