JAVA Developer

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JAVA Developer | Quality & Reliability (QnR), the parent company of QnR Group

Role overview

We are looking for a Java Developer to join Quality & Reliability (QnR) and design, develop, deploy, and support complex Information Systems for our customers. The job holders will have the opportunity to be exposed to a wide variety of technologies to develop a solid background in the field of applications development.

About QnR Group

QnR Group is a technology group with 35 years of experience, 8 companies, 4 delivery centers and 210+ professionals across Greece, Belgium, Cyprus and Poland. Listed on the Athens Stock Exchange since 2000, we deliver mission-critical digital transformation projects for the public and private sector. The Group’s capabilities covers software engineering, enterprise and generative AI, cybersecurity, cloud infrastructure, SAP and ServiceNow solutions, core banking and maritime intelligence.

Requirements

What you'll work on:

• Design, develop, and maintain Java and Spring Boot applications, ensuring scalability, performance, and reliability
• Write clean, efficient, and maintainable code following software development best practices
• Develop and integrate RESTful APIs and design relational database solutions
• Perform code reviews, testing, debugging, and troubleshooting to ensure application quality and security
• Collaborate with cross-functional teams to analyze requirements and deliver effective technical solutions
• Participate in Agile development processes, technical documentation, and application releases
• Maintain and optimize existing applications, continuously improving performance and functionality

What you bring:

• Bachelor’s degree in Computer Science or a related field (Master’s degree is a plus)
• 2–4 years of professional experience in Java development (Java 8+), including Spring Boot and Java EE applications
• Strong knowledge of Spring Framework (Spring Boot, WebFlux, Spring Data, Spring Security), JPA/Hibernate, and relational databases (PostgreSQL, Oracle, MySQL)
• Experience with RESTful application development, database design, code optimization, testing, debugging, and technical documentation
• Familiarity with JUnit, Mockito, Maven/Gradle, Git, Object-Oriented Design (OOD), Design Patterns, and TDD
• Knowledge of Microservices, Spring Cloud, Docker, Kubernetes, GraphQL, and messaging technologies (Kafka, RabbitMQ, ActiveMQ) is an advantage
• Exposure to ReactJS, JEE frameworks/application servers, XML/XSD, CI/CD tools, and Agile methodologies is a plus.
• Previous involvement in Public Sector projects will be considered a strong asset
• Strong analytical, problem-solving, communication, teamwork, and time management skills, with an organized, detail-oriented, and collaborative mindset