As a member of our development team, you will contribute to the modernization, design, and enhancement of enterprise-grade applications.
Responsibilities:- Upgrade applications from Java 8 to Java 17 or higher.
- Develop vendor‑agnostic, portable Java solutions.
- Implement and maintain Spring Boot backend applications.
- Integrate Spring Boot services with external systems and deploy on Apache Tomcat.
- Develop OpenAPI-compliant REST APIs and integrate with existing RESTful services.
- Implement advanced API models (GraphQL, SPARQL, asynchronous event-driven APIs).
- Integrate secure secrets management using tools such as Hashicorp Vault.
- Refactor code to securely retrieve secrets from external tools.
- Manage dependencies using Maven.
- Work with Oracle and PostgreSQL databases, including data migration strategies.
- Query and update relational databases.
- Containerize applications using Docker, ensuring cloud-agnostic compatibility.
- Integrate with messaging platforms such as Kafka and manage versioned data schemas.
- Follow CI/CD best practices for automated testing, integration, and deployment.
- Use Git for version control and structured delivery processes.
- Handle licensing and compliance considerations for components and dependencies.
- Refactor and migrate applications from WebLogic to Tomcat.
- Perform thorough testing and validation of application changes.
- Document code, configurations, APIs, and system behavior.
- Provide modern, developer-friendly API documentation (interactive sandbox, examples, tagging).
- Collaborate effectively with other teams and project stakeholders.
- Develop frontend components using Angular (and potentially eUI).
- Apply HTML5, CSS3, responsive and accessible design best practices.
- Use frontend build tools such as Webpack or Vite.
- Integrate solutions with AWS, Azure, or GCP platforms.
- Utilize SaaS and CaaS hosting services.
- Integrate monitoring tools such as the ELK stack, and monitor asynchronous systems.
- Work in an Agile/Scrum environment using tools like Jira, Confluence, SharePoint, and Teams.
- 8 years of experience with Java (Java 8 → Java 17 upgrade experience).
- Spring Boot development and Tomcat deployment.
- REST API and OpenAPI development.
- Experience with GraphQL, SPARQL, or asynchronous API patterns.
- Secrets management with Hashicorp Vault or similar tools.
- Maven dependency and build management.
- Oracle and PostgreSQL database experience, including migrations.
- Docker containerization.
- Kafka or similar distributed message brokers.
- CI/CD pipelines and Git workflows.
- Licensing and compliance understanding for software components.
- Refactoring from WebLogic to Tomcat.
- Frontend development with Angular, HTML5, CSS3, responsive design.
- Webpack / Vite build tools.
- Cloud platform integration (AWS, Azure, GCP).
- Monitoring tools such as ELK.
- Bachelor’s or equivalent degree (minimum 3 years post‑high‑school) in IT, Computer Science, or a related field (EQF Level 6).
- Ability to analyze complex issues and develop effective technical solutions.
- Strong communication and interpersonal skills.
- Experience documenting systems, APIs, and technical environments.
- Fluency in English required; French is a strong asset.
We’ll propose you:
- An attractive salary package.
- A good work-life balance environment.
- The assurance of working with cutting-edge technologies in an entrepreneurial spirit.
- The opportunity to develop your skills with tailor-made training based on your needs.
- A great job in a friendly and collaborative environment.
If you wish to join a dynamic, human‑scale structure while working with the latest technologies, don’t wait—join Cronos!
Top Skills
What We Do
Cronos Europa is an IT and digital communications company uniquely dedicated to serving the European institutions, agencies and bodies.
From the European Union to EUROCONTROL, we partner with a range of supranational and interinstitutional authorities.
Our mission is to arm them with the tools they need to thrive in the digital age.
Every aspect of our organisation is designed to complement their capabilities - from our people to our processes and our premises.
Our brand combines the expertise of former companies Cronos International and C-Dev, with the creative skills of Inspiiro and the breadth of capabilities of the Cronos Group.
Today, Cronos Europa employs over 1,000 people in offices across Belgium, Luxembourg and the Netherlands, serving institutions across diverse framework contracts.
Cronos Europa is part of the Cronos Group, one of the largest IT service providers in the Benelux, employing over 8,000 people across 200 competence centres.
By leveraging the Group’s resources, Cronos Europa can help clients extract value from new and emerging technologies, for everything from Artificial intelligence to Zg Quantum.
For spontaneous applications: https://cronoseuropa.breezy.hr/p/7a64ee973c6701-spontaneous-application?state=published
