Backend Developer

Quality and Reliability (QnR) is a leading Technology Group, with more than 30yrs of presence in the market, delivering mission-critical digital transformation across Greece, Europe, and the broader EMEA region. Q&R is an Athens Stock Exchange-listed technology Group currently undergoing a period of significant growth and transformation, having completed five acquisitions within the last 18 months.

QUALITY & RELIABILITY S.A. (Q&R S.A.) is a leading international technology company and a Great Place to Work® Certified organization for the 3rd consecutive year, delivering innovative software solutions and digital transformation projects for major organizations across multiple industries.

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., Front-End, BA-QA) and be exposed to modern practices such as AI-driven automation to improve development efficiency and code quality. This position offers a unique opportunity to further develop your backend expertise in a dynamic and innovative environment.

Responsibilities:

• Develop & Maintain Java Services: Implement and optimize Spring Boot-based backend solutions, ensuring clean, secure, and efficient code
• Enhance Code Quality & Performance: Contribute to reusable libraries, peer code reviews, automated quality checks (e.g., SonarQube), and database optimization (Oracle, Postgres)
• Testing & Documentation: Write and maintain unit tests (JUnit, Mockito), follow TDD principles, and document backend development for clarity and maintainability
• Collaboration & Agile Practices: Work closely with Front-End, QA, and senior developers, participate in stand-ups, retrospectives, and knowledge-sharing sessions
• Support & Troubleshooting: Assist in product releases, ensure compliance, and resolve backend issues to maintain smooth system operations

Requirements

• Bachelors degree in Computer Science or a related field (or equivalent professional experience)
• Minimum of 4 years in backend development with Java (11, 17+)
• Minimum of 2 years in Spring Boot, SQL (Oracle or Postgres) with basic query optimization and indexing, ORM frameworks (JPA/Hibernate), Build Tools (Maven) and Version Control (Git), Object-Oriented Design (OOD), Design Patterns, and familiarity with TDD practices

Desired Qualifications:

• Masters degree in Computer Science or a related field
• Awareness of endpoint security and deployment best practices (e.g., ACMS)
• Exposure to AI-driven documentation or code generation tools
• Understanding of Agile or Scrum workflows
• Experience with Jenkins, Bitbucket Pipelines, or similar CI/CD tools
• Basic familiarity with ReactJS (or similar front-end frameworks) is a plus

Personal Attributes:

• Team Oriented: Strong communication and collaboration skills, open to feedback and learning from peers
• Problem Solver: Analytical thinking with attention to detail and a drive for continuous improvement
• Organized & Methodical: Ability to manage tasks effectively, adhering to deadlines and project milestones
• Adaptable: Willingness to embrace new technologies and best practices to improve outcomes
• Growth Mindset: Eagerness to expand skill set, including AI/LLM-focused learning and certifications

Benefits

• We want our people to be well compensated, so we offer an attractive salary package
• Health is the most important asset, so we have you secured with a health insurance and compilation plan from day one
• We are excited for challenges, so you are invited to take part in exciting, innovative projects that make a difference
• We never stop learning and evolving! We encourage our people to follow the pace by providing them voucher for Training Courses, so that they adapt new tech skills and develop their soft skills
• Most important, we work as a team, so we gather on a smaller and bigger occasions to celebrate good times together!