Senior Java Developer – Brussels (On site) – EUROCONTROL Job role: Senior Java Developer. Location: Brussels (On site). Languages required: English (C1) (Mandatory). Minimun experience required: 14 years. Key responsibilities: · Software Development: Design and develop high-performance, scalable applications using Java and Quarkus, ensuring that code is maintainable, efficient, and aligned with best practices. · Database Optimization: Architect and optimize MongoDB and PostgreSQL schemas, queries, and indexing strategies to achieve high performance and scalability. · Microservices & Messaging: Develop and scale microservices using Kafka for messaging, integrating with the ELK stack for logging, monitoring, and troubleshooting. · Performance Engineering: Identify, analyze, and optimize system performance bottlenecks in both code and infrastructure. Ensure optimal performance through rigorous profiling, testing, and fine-tuning. · DevOps: Expertise with DevOps and CI/CD principles, use pipelines with Jenkins, SonarQube, and Nexus, focusing on security, automation, and deployment efficiency. · Security: Implement secure coding practices throughout the development lifecycle. · Mentorship: Provide guidance to junior developers, sharing knowledge and fostering a culture of continuous improvement. · Stakeholder Interaction: Work closely with product owners, architects, and other stakeholders to understand requirements, provide technical insights, and deliver effective solutions. · End-to-End Ownership: Take full ownership of tasks from analysis through design to implementation and deployment. Be proactive in driving solutions independently, ensuring high-quality and timely delivery. Skills & qualifications: · Proven experience with Java, Maven and Quarkus/Spring in building large-scale applications. · Strong experience with Git, ideally Bitbucket. · Strong background in MongoDB and PostgreSQL, with a focus on optimizing data access and ensuring scalability. · Expertise in Kafka for building event-driven systems and integrating with the ELK stack for monitoring and troubleshooting. · Deep understanding of performance optimization and profiling techniques for both code and database layers. · Strong experience with Docker, Kubernetes, Jenkins, SonarQube, and Nexus for DevOps and CI/CD pipelines. · Ability to implement security best practices, including secure coding, vulnerability management, and compliance. · Excellent soft skills, including the ability to analyze requirements, communicate effectively with cross-functional teams, and take initiative to drive tasks to completion. · Solid experience in Agile methodologies with a focus on delivering high-quality software in iterative cycles. · A proactive and independent mindset, with the ability to work with minimal supervision and take full responsibility for end-to-end delivery. · Exposure to performance profiling tools and security tools (e.g., Snyk, OWASP). Location: · Brussels (On site). Language: · English (C1). Rate: · 475-495€/day.