Senior Java Engineer

Uni Systems· Software Technical Division
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📍 Athens, Attica, GreeceFull time

About this role

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

In this role, you will have the opportunity to work closely with our customers in the public sector and you will be responsible for developing applications and implementing new technologies while providing excellent client service.

What will you be bringing to the team?

Our UniQue people come from a variety of different backgrounds and industries, with different skillsets and approaches, but they have one thing in common: a passion for technology and innovation! For the Senior Java Engineer position we expect you to:

  • Work with a skilled team as an experienced key member on analysis, design, and implementation of Enterprise, Java-based solutions for our customers
  • Maintain and evolve existing software applications by analyzing and identifying areas for modification
  • Close cooperation with client teams and follow up business requirements
  • Produce and maintain technical and system documentation
  • Validate technical feasibility and propose alternative solutions
  • Coach and guide young team members

What do you need to succeed in this position?

Your experience, skillset and qualifications are going to help you succeed in this position, moving forward.

We would like you to have:

  • Minimum 7 years of professional experience in the IT field, with at least 4 years in Java-based solutions, i.e. Java EE, Spring (Spring Framework, Spring Boot, Spring Data), etc.
  • An in-depth knowledge of Java platform, object-oriented programming and dependency injection
  • A Deep knowledge of ORM implementations, i.e. Hibernate, Eclipselink etc. and JPA interface
  • Sound experience in building scalable distributed applications based on SOAP and RESTful web services
  • Very good knowledge of design patterns and best practices in software design
  • An in-depth knowledge and experience with authentication and authorization standards e.g. OAuth2, JWT
  • Solid experience with code quality metrics and test coverage
  • Solid experience in relational databases (preferably Oracle)
  • Solid experience in Java EE Application Servers (i.e. WebLogic, Wildfly)
  • Very good analytical and problem-solving skills
  • The ability to design and implement solutions with minimal supervision
  • A Passion for building software and continuous learning
  • The ability to cooperate, team-play and maintain professionalism in all situations
  • A University/ College degree in Computer Science or equivalent working experience

The following will be considered an asset:

  • Professional experience in frontend development frameworks (i.e. React)
  • Experience with distributed/modular architectures
  • Familiarity with ElasticSearch
  • Familiarity with Enterprise Integration Patterns implementation frameworks, e.g. Apache Camel
  • Familiarity with Jenkins and CI/CD
  • Experience in PL/SQL
  • Experience in technical leading

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 model
  • 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 Ergonomia
  • 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 has made us the leading and reliable systems integrator of today and has 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, 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.

Frequently Asked Questions

Is the salary disclosed for the Senior Java Engineer position at Uni Systems?
The salary for this Senior Java Engineer role at Uni Systems is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Senior Java Engineer position at Uni Systems located?
This Senior Java Engineer role at Uni Systems is based in Athens, Attica, Greece. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Senior Java Engineer role at Uni Systems full-time or part-time?
This is listed as a Full time position. It is posted as a Senior Java Engineer role in the Software Technical Division department at Uni Systems.
Which team or department does the Senior Java Engineer at Uni Systems belong to?
This Senior Java Engineer position is part of the Software Technical Division department at Uni Systems. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Senior Java Engineer position at Uni Systems?
Click the "Apply Now" button on this page. You will be redirected to Uni Systems's official application portal hosted on workable where you can submit your application directly.
When was the Senior Java Engineer job at Uni Systems posted?
This Senior Java Engineer position at Uni Systems was posted on Sep 2, 2026. Apply as soon as possible — early applications are often reviewed first.
Senior Java Engineer
Uni Systems
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