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