Backend Engineer (Senior)

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 customers and our partners' customers. 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.

About QnR Group SquareDev is a member of the QnR Group, a leading technology organization specializing in end-to-end custom software solutions, Artificial Intelligence, Cybersecurity, SAP S/4HANA, SAP Business One, ServiceNow, and FinTech solutions. As part of QnR Group's ongoing expansion — both in Greece and internationally — we are continuously hiring across a wide range of tech roles. Successful candidates may be hired by QnR Group, or another company within the Group, depending on the role and project.

Role overviewWe 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.