Senior Java Engineer

At Uni Systems, we are working towards turning digital visions into reality. We are continuously growing, and we are looking for a Senior Java Engineer to join our UniQue team.

What will you be bringing to the team?

• Lead the design, development and optimization of enterprise Java-based applications using Spring, Java EE, or Quarkus
• Define and enforce software engineering best practices, including design patterns, secure coding, and performance tuning
• Architect and implement robust APIs and Microservices using REST or SOAP
• Oversee the configuration and management of Azure/AWS DevOps pipelines and Git-based CI/CD workflows
• Ensure application quality through automated testing, test coverage analysis, and static code analysis tools
• Collaborate closely with Architects, BAs, QAs, and DevOps Engineers within Agile/SAFe frameworks
• Drive the adoption of DevOps principles and contribute to Infrastructure as Code and containerization strategies
• Participate in code reviews and mentor mid/junior Developers
• Support application deployment on Java EE Application Servers and container platforms
• Provide 3rd-level support, troubleshooting complex issues, and contributing to continuous improvement

Requirements

What do you need to succeed in this position?

• Bachelor's or Master's degree in Computer Science, Engineering, or a related field
• Minimum 5 years of professional experience in Java development
• Advanced knowledge and hands-on experience in either Spring or Java EE
• Experience with Quarkus
• Proven experience with JPA, Hibernate, and scalable architectures
• Familiarity with distributed architectures, containerization (e.g., Docker), and orchestration tools
• Experience with RDBMS and understanding of performance tuning and monitoring
• Solid understanding of CI/CD, especially with Azure/AWS,  Git, Jenkins, and Maven
• Familiarity with TOGAF, UML, and system documentation standards
• Exposure to front-end technologies such as React, Angular, and Liferay is a strong asset
• Ability to lead technical discussions and support strategic design decisions
• Excellent communication skills and command of English, both written and verbal

Benefits

What are we offering to our UniQue IT people?

• People-first approach and open environment to express your ideas
• Work-life balance and a hybrid work mode
• Continuous training and development
• Opportunities to join innovation initiatives
• Ticket restaurant - meal vouchers
• Corporate laptop and equipment
• Corporate mobile phone subscription
• Health and insurance plan for you and your family members
• Employee consulting and guidance support by Hellas EAP
• Discounts on the services and products of our Group's companies
• Gift vouchers for major life milestones
• Special work schedule on summer Fridays and birthdays

Our UniQue IT people are the most valuable part of Uni Systems; their knowledge and experience have made us the leading and reliable systems integrator of today and have contributed to our steady financial growth. We have created and are maintaining a stable working environment for our employees, with countless opportunities to innovate and thrive. Our work culture recognizes our UniQue IT people, and supports the free sharing of ideas and the flow of information via open communication while appreciating and effectively utilizing the talents, skills and perspectives of each employee.

At Uni Systems, we are providing equal employment opportunities and banning any form of discrimination on grounds of gender, religion, race, color, nationality, disability, social class, political beliefs, age, marital status, sexual orientation or any other characteristics. Take a look at our Diversity, Equality & Inclusion Policy for more information.