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 9+ (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