Java Back-End DeveloperSee all recent Jobs
Overview
Experience: Senior
Skills: Java, Spring, Springboot, Kafka, Oracle DB, SSO
Reference Number: UPC1132
Belgium, Brussels
Full Time
We are seeking a skilled and experienced Java Back-End Developer to join our team on an on-site assignment at the European Commission 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 3–5 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
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