HubMub
-
TheWhiteam

Senior Fullstack Developer, Brussels (on-site) – Eurocontrol

TheWhiteam
Belgium · Full-time · Mid-Senior
Job role: Senior Fullstack Developer.

Minimum experience: Minimum of 14 years of professional experience.

Language: English (C1) (Mandatory).

Location: Brussles (on-site).

Key responsabilities:

  • 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.
  • Storage: Experience with bucket based storage solutions, like MinIO.
  • Authentication & Authorization: Knowledge of authorization concepts like Role-Based Access Control (RBAC). Knowledge of authentication concepts like JSON Web Tokens.
  • Frontend: proven experience with:
  • Core technologies: React (with typescript), webpack (bundling and build configuration) and modern Javascript (ES6+)
  • UI & Styling: Ant design
  • Testing: Jest (unit/integration testing) and React Testing Library

Technical 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.
  • 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 & 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.

Language:

  • English (C1).

Location:

  • Brussels (on-site).

Rate:

  • 505-525€/day.

Key Skills

Ranked by relevance

devops microservices postgresql jenkins storage react kafka nexus java cicd elk javascript kubernetes typescript webpack docker maven git ui
Login to Apply
🇧🇪

Country Guide

Belgium

International hub for EU careers

Posted
Jan 17, 2026
Type
Full-time
Level
Mid-Senior
Location
Brussels
Company
TheWhiteam

Industries

IT Services IT Consulting

Categories

Engineering Information Technology

Related Jobs

3 roles aligned with this opportunity

View all jobs
View Job Details
TheWhiteam
Related

Back-End Developer, Brussels (near-site) – European Commission

2026-02-26

Contract
Entry
Belgium
IT Services
Engineering
View Job Details
TheWhiteam
Related

Backend Developer – Java Spring Boot | Microservices - España (Remoto)

2026-05-13

Full-time
Not Applicable
Spain
IT Services
Engineering
View Job Details
TheWhiteam
Related

Senior DevOps Engineer, Luxembourg (Near site) – EIB

2026-02-27

Full-time
Mid-Senior
Luxembourg
IT Services
Engineering