backend developer
Oct 13, 2026 · Quality & Reliability
What you'll do
- Develop and optimize Java services using Spring Boot.
- Build reusable libraries, participate in peer reviews, and perform quality checks with SonarQube.
- Optimize databases, including Oracle and Postgres.
- Write and maintain unit tests with JUnit and Mockito, applying TDD principles.
- Document backend development for clarity and maintainability.
- Collaborate with Front-End, QA, and senior developers in Agile ceremonies and knowledge-sharing sessions.
- Support product releases, ensure compliance, and troubleshoot backend issues.
Key requirements
- 4+ years' experience
- Java, Spring Boot, and Backend Development
- SQL, Oracle, Postgres, and JPA/Hibernate
- Maven and Git
- Object-Oriented Design and Design Patterns
- TDD, JUnit, and Mockito
- SonarQube
- Computer Sciencepreferred
Benefits
- The position offers an attractive salary package and health insurance and compilation plan from day one.
- Employees can participate in innovative projects and receive vouchers for training courses.
- The company also organizes smaller and bigger occasions for team celebrations.
About the job
We are seeking motivated and talented professionals to join our highly skilled teams. As a Mid Back End Developer at Q&R S.A., you will work on designing, developing, and maintaining high-quality backend services for enterprise projects. You will collaborate with cross-functional teams (e.g.…
About the company
As a leading System Integrator in Greece, Q&R develops and implements complex, mission critical IT systems and solutions for the major sectors of the economy, focusing on governmental organizations and large enterprises. Q&R has a strong record of successfully completing an extensive list of technology projects for over three decades. The company is certified as per ISO9001:2015, ISO27001:2013, ISO14001:2015, ISO22301:2012, ISO20000-1:2018, and ISO237001:2017.
Q&R Group possesses deep expertise and extensive capabilities in the areas of intelligent workflows, automation, integration, and data management, while actively investing in new emerging technologies based on Artificial Intelligence, Machine Learning, Natural Language Processing, Robotics Process Automation and building specialized solution in the area of sustainability and energy.
The Q&R Group has developed strategic partnerships with the top global technology vendors in these areas like Oracle, Microsoft, IBM, and SAP.
Q&R Group develops own software and markets off-the-self customized vertical applications like ORAMA ERP, DMS, Property Management, and Bank Guarantees Letter Management and information system for the collection, processing, and certification of energy metering data in the context of implementing the energy balance market.
Q&R S.A. founded in 1992, is traded in the Athens Stock Exchange since 2000 (stock symbol: QUAL).
Q&R Group is also active in Cyprus, Brussels, Romania, and broader Balkan area.
About the company
As a leading System Integrator in Greece, Q&R develops and implements complex, mission critical IT systems and solutions for the major sectors of the economy, focusing on governmental organizations and large enterprises. Q&R has a strong record of successfully completing an extensive list of technology projects for over three decades. The company is certified as per ISO9001:2015, ISO27001:2013, ISO14001:2015, ISO22301:2012, ISO20000-1:2018, and ISO237001:2017.
Q&R Group possesses deep expertise and extensive capabilities in the areas of intelligent workflows, automation, integration, and data management, while actively investing in new emerging technologies based on Artificial Intelligence, Machine Learning, Natural Language Processing, Robotics Process Automation and building specialized solution in the area of sustainability and energy.
The Q&R Group has developed strategic partnerships with the top global technology vendors in these areas like Oracle, Microsoft, IBM, and SAP.
Q&R Group develops own software and markets off-the-self customized vertical applications like ORAMA ERP, DMS, Property Management, and Bank Guarantees Letter Management and information system for the collection, processing, and certification of energy metering data in the context of implementing the energy balance market.
Q&R S.A. founded in 1992, is traded in the Athens Stock Exchange since 2000 (stock symbol: QUAL).
Q&R Group is also active in Cyprus, Brussels, Romania, and broader Balkan area.