Full Stack 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 s 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.

• Storage: Experience with bucket based storage solutions, like MinIO.
• Authentication s Authorization: Knowledge of authorization concepts like Role- Based Access Control (RBAC).Knowledge of authentication concepts like JSON WebTokens.
• Frontend: proven experience with

• Core technologies: React (with typescript), webpack (bundling and build configuration) and modern Javascript (ES6+)
• UI C Styling: Ant design
• Testing: Jest (unit/integration testing)and React Testing Library

Technical Skills s 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.
• Solid experience in Agile methodologies with a focus on delivering high-quality software in iterative cycles.
• Exposure to performance profiling tools and security tools (e.g., Snyk, OWASP).

Interpersonal Skills s proven maturity

• Excellent soft skills, including the ability to analyze requirements, communicate effectively with cross-functional teams, and take initiative and drive tasks to completion.
• A proactive and independent mindset, with the ability to work with minimal supervision and take full responsibility for end-to-end delivery
• Not afraid to completely take over a codebase without proper handover by a previous team of developers.