We are seeking a skilled and experienced Java Back-End Developer to join our team on an on-site assignment at a European Institution in Brussels. This is an exciting opportunity to contribute to high-impact, scalable digital solutions at the heart of the EU.
As part of a multidisciplinary team, you will be involved in the full development lifecycle of secure and scalable applications supporting complex business processes. You’ll work in a multicultural, fast-paced environment with a high degree of autonomy and responsibility.
Key Responsibilities
Design, develop, and maintain robust and scalable back-end applications
Implement core business logic and application functionality
Create and manage servers and databases ensuring data integrity and performance
Ensure security best practices and data protection compliance
Collaborate with front-end developers for cross-platform optimization and integration
Develop and document RESTful and SOAP APIs
Lead and contribute to the design of scalable software architectures
Maintain clean, functional, and well-documented code
Perform code analysis, troubleshoot, and identify areas for improvement
Conduct unit testing, fix bugs, and ensure overall system reliability
Produce and maintain comprehensive technical documentation
Participate in project meetings with technical and non-technical stakeholders
Take the lead on specific projects or modules, when required
Required Qualifications
Bachelor’s degree (EQF Level 6) in Computer Science, Software Engineering, or other IT-related field (minimum 3 years)
At least 7+ years of professional experience in a similar back-end development role
Technical Skills (Required)
Java 8+ (professional-level experience)
Java Frameworks: Spring, Spring Boot, Hibernate, Java EE
API Development: REST, SOAP, OpenID Connect, OAuth2, API Gateway configuration
Oracle RDBMS, experience in database performance tuning
Messaging systems: Kafka, JMS, ActiveMQ
Web servers: Oracle WebLogic, Apache
Security protocols: SSL/TLS, reverse proxy configuration
Cloud services: Amazon Web Services (AWS), microservices architecture, cloud-native development
CI/CD tools: Bamboo, Git
Testing tools: SOAPUI, ReadyAPI, Postman
Containerization: Docker
Basic familiarity with NoSQL databases (e.g. MongoDB) is a plus
Understanding of Agile/Scrum methodologies
Soft Skills
Strong analytical and problem-solving skills
Excellent organizational and time management skills
Ability to work autonomously as well as part of an international team
Strong attention to detail and code quality
Effective communication skills in multicultural and multilingual environments
Proven collaboration and mentoring abilities
Discretion and integrity when working with sensitive or personal data
Languages
English: Minimum B1 level (oral and written) – required
French: Minimum B1 level – desirable
Nice to Have
Familiarity with Kubernetes or other orchestration tools
Experience with front-end frameworks such as Angular, TypeScript, HTML/CSS
Previous experience in public sector or EU institutions environments
Why Join Us
Work on critical digital services at the heart of European governance
Contribute to large-scale systems that serve millions of EU citizens
Join a team of professionals working on cutting-edge technology in a secure and structured environment
Be part of a multicultural, inclusive workplace with a focus on innovation and sustainability
About UpcoMinds
UpcoMinds is a dynamic IT Company with 28 years of experience, offering end-to-end web and mobile solutions that help businesses reinvent themselves in the digital world.
Alongside our strong technical and design expertise, we operate in Cyprus as an IT Outsourcing \& Recruitment partner, connecting professionals with top-tier roles on behalf of our clients.
We support large-scale projects in the public sector, semi-governmental organizations, banking and the technology industry, helping our clients build reliable teams and deliver digital innovation.
Through long-term collaborations, we match skilled talent with the right opportunities, contributing to meaningful, real-world transformation.
🌐 Learn more at www.upcominds.com