Java / Angular Application Architect (Senior / Expert) Secondment Assignment

Location: Brussels region (hybrid working model)
Contract type: Secondment (freelance or employment via our organization)
Start date: To be agreed
Duration: As soon as possible 9 months (full time) - 31/12/2026

About the role

We are currently seeking a highly experienced Application Architect (Java / Angular) for a long-term secondment assignment within a complex enterprise environment.

The selected professional will be deployed at one of our clients and will work as part of an established development organization. The role combines technical architecture design hands-on engineering expertise and leadership of development teams.

The engagement can be fulfilled either as an independent freelancer or as an employee within our organization working under a staffing/secondment model.

Responsibilities

• Design and evolve enterprise-grade application architectures
• Translate business requirements into scalable and maintainable technical solutions
• Lead and support Java development teams in day-to-day delivery
• Define technical standards and ensure adherence through code reviews
• Improve existing systems and propose architectural enhancements
• Collaborate within Agile/Scrum teams in a complex IT landscape
• Contribute to system integration and domain-driven design approaches

Technical requirements

The ideal candidate has strong and proven experience in:

• Java EE / Jakarta EE (expert level 10 years)
• SQL / RDBMS / JPA (expert level 10 years)
• REST APIs (8 years)
• Spring / Spring Boot (5 years)
• Angular (5 years)
• OAuth / security implementations (3 years)
• Kafka (or similar event-driven technologies)
• PostgreSQL or other relational databases
• Agile / Scrum methodologies (Jira)

Architecture & leadership skills

• Strong experience in enterprise application architecture
• Knowledge of Hexagonal Architecture (Ports & Adapters)
• Ability to define and enforce technical standards
• Experience leading and mentoring development teams
• Strong analytical and abstraction capabilities
• Ability to align technical solutions with business domains

Languages

• English: fluent (working language)
• Dutch: passive understanding required
• French: passive or good level required

Profile

• 10 years of experience in Java enterprise environments
• Proven experience as Lead Developer Tech Lead or Application Architect
• Strong communication skills in both technical and business contexts
• Able to integrate quickly into existing teams and structures
• Proactive structured and solution-oriented mindset

Practical information

• Hybrid working model (Brussels region)
• Long-term assignment with strong stability
• Assignment delivered via secondment (staffing model)
• Candidate can be engaged as a freelancer or as an internal employee
• Important: Belgian nationality required due to project constraints

Interested

Are you an experienced Application Architect who enjoys working in complex enterprise environments and taking technical ownership within development teams