SquareDev

Backend Engineer (Senior)

🇱🇺 Luxembourg, LU Hybrid Full time Posted Apr 28, 2026
LocationLuxembourg, LU
WorkplaceHybrid
EmploymentFull time
PostedApril 28, 2026
Last verifiedMay 7, 2026

Why are you looking for a job?

If your answer ticks all the boxes, this could be the start of a great collaboration.

  • You have a curious mind - You won't understand what we're talking about if you don't.
  • You want to learn more around technology - You won't survive if you don't.
  • You want to make the world a bit better - We don’t like you if you don’t.

We happen to be just like that as well. We like hacking things here and there (you included) and create scalable solutions that bring value to the world.

Squaredev? 🐿️

We use state-of-the-art technology to build solutions for our own customers and for the customers of our partners. We make sure we stay best-in-class by participating in research projects across Europe, collaborating with top universities and enterprises on AI, Data, and Cloud.

Role overview

We are looking for an experienced Backend Engineer who will design, develop, maintain, test, and deploy robust and scalable web portals, applications, reusable components, and backend services using Java and the Spring ecosystem. You will collaborate closely with team leads, tech leads, business analysts, developers, and QA engineers to fully understand business and technical requirements, ensuring alignment, consistency, and high-quality implementation across the entire development lifecycle.

You will also play an active role in deploying, monitoring, and supporting applications in both on-premises and cloud-based containerized environments, contributing to architectural decisions and continuously improving system performance, scalability, and reliability.

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