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Java Lead Developer (Hybrid)


Java Developer B2B Contract for 1 year and possible extensions Brussels Onsite 2 or 3 days/week 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 Experimentiertheater , 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).

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