Senior Full Stack Developer

About the Company

Our client is delivering large-scale enterprise technology solutions for a major European institutional environment. Working on secure mission-critical platforms they develop and maintain complex web applications that support thousands of users across Europe.

• Location: Brussels Belgium (Hybrid)
• Employment Type: Full-time
• Level: Mid-Senior Level
• Work Authorization: EU nationality is a mandatory

Were looking for an experienced Senior Full Stack Developer with strong backend expertise to join a long-term enterprise project based in Brussels.

Youll work on secure enterprise-grade web applications using modern development practices while collaborating closely with architects developers and technical stakeholders. This is a hands-on engineering role with a strong focus on backend development DevSecOps and scalable application architecture.

This position requires on-site presence in Brussels three days per week. Remote work from outside Belgium is not permitted.

• Design develop and maintain enterprise web applications with a strong backend focus.
• Build scalable solutions using Symfony PHP SQL Python JavaScript and HTML.
• Develop and maintain secure CI/CD pipelines and DevSecOps practices.
• Deploy and manage applications within Kubernetes environments.
• Apply modern software engineering principles including OOP SOLID and clean architecture.
• Collaborate with cross-functional teams throughout the full software development lifecycle.
• Contribute to application performance reliability security and maintainability.

• Minimum 11 years of combined academic and professional experience.
• EU nationality.
• Strong hands-on experience with Symfony PHP SQL Python JavaScript and HTML.
• Experience with Kubernetes CI/CD pipelines and DevSecOps practices.
• Solid understanding of Object-Oriented Programming (OOP) and SOLID principles.
• Experience building enterprise-scale applications.
• Excellent analytical troubleshooting and problem-solving skills.
• Strong communication skills and ability to work effectively in collaborative environments.
• Ability to obtain (or already hold) a Personal Security Clearance.
• At least one of the following certifications: Oracle Certified Professional Java EE 8 / Java SE 17 or higher PM² Agile BPMN 2.0
• Ability to work on-site in Brussels Belgium 3 days per week.

Nice to Have

• Experience with API Platform and/or React.
• Advanced DevSecOps and CI/CD architecture experience.

• Long-term enterprise project.
• Opportunity to work within a highly secure European institutional environment.
• Challenging technical work using modern technologies.
• Collaborative international team.
• Stable full-time engagement with long-term career opportunities.

If youre an experienced engineer who enjoys building secure enterprise applications and wants to contribute to high-impact European projects wed love to hear from you...