JAVA Developer

Quality & Reliability S.A. (QnR); Ohio; On-site; USD 90,000 - 120,000; Full time

Job summary

Quality & Reliability (QnR) is seeking a Java Developer to design, develop, deploy, and support complex information systems. You will work across a range of technologies, contributing to scalable, reliable software and engaging with cross-functional teams in an agile environment.

The role emphasizes building RESTful services, database design, testing, and continuous improvement, with opportunities to grow within QnR Group across Europe and beyond.

Qualifications

• Bachelor’s degree in Computer Science or a related field (Master’s degree is a plus).
• 2–4 years of professional Java development experience (Java 8+, Spring Boot, Java EE).
• Strong knowledge of Spring Framework, JPA/Hibernate and relational databases (PostgreSQL, Oracle, MySQL).
• Experience with RESTful development, database design, testing, debugging, and technical documentation.

Responsibilities

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

Skills

Java Development

Spring Boot

RESTful APIs

Relational Databases

JUnit/Mockito

Git

Maven/Gradle

OO Design

Design Patterns

TDD

Microservices

Spring Cloud

Docker

Kubernetes

GraphQL

Kafka

RabbitMQ

ActiveMQ

ReactJS

Education

Bachelor’s degree in Computer Science or a related field

Master’s degree is a plus

Tools

Git

Maven/Gradle

JUnit/Mockito

Docker

Kubernetes

CI/CD

GraphQL

Job description

Are you a JAVA Developer? Think bigger about your next move!

Build your future with QnR Group.
JOIN THE NEXT EUROPEAN TECHNOLOGY POWERHOUSE

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 Groupis 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 coverssoftware engineering, enterprise and generative AI, cybersecurity, cloud infrastructure, SAP and ServiceNow solutions, core banking and maritime intelligence.

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