Application Architect – Public Sector Digital Services
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What you will do
You will join delivery teams working on the development, integration, and evolution of critical digital services supporting public administrations. The initiative aims to enable digital transformation through interoperable, secure, and scalable solutions that facilitate collaboration and information exchange between organisations.
Your responsibilities include:
- Contribute to the design of application architecture and technical building blocks in collaboration with technical leads and solution architects
- Develop and maintain business applications and shared digital services
- Develop application components, APIs, and web services
- Participate in technical workshops, Agile/Scrum ceremonies, and stakeholder meetings
- Support testing activities, technical documentation, deployments, quality assurance, monitoring, reporting, and continuous improvement initiatives
- Collaborate with multidisciplinary teams to ensure alignment with business and technical requirements
- Ensure adherence to security, performance, interoperability, and quality standards
- Conduct code reviews
What we are looking for
Experience:
- Minimum 7 years of professional experience in Java software development
- Minimum 5 years of professional experience in application architecture
- Experience working in complex multi-system environments and large-scale digital transformation projects
- Proven experience in Agile delivery environments
- Experience in public sector environments is considered an asset
Technical skills:
- Java >= 21 and Spring Framework (Core, JDBC, Data, Security, AOP)
- JPA / Hibernate
- RESTful Web Services
- OpenAPI / Swagger
- Keycloak, Lombok, MapStruct
- SOA, Backend-for-Frontend, CQRS
- Test-driven development (JUnit, Mockito, Spring Test, Cypress)
- Angular 20
- Maven
- Docker
- OpenShift / Kubernetes
- Git and GitLab CI/CD
- SonarQube
- NPM
- OAuth 2.0
- Flyway or Liquibase
- PostgreSQL, SQL Server and relational databases
- BPMN and UML
- Jira and Confluence
- Agile/Scrum methodologies
- Continuous Integration and Continuous Delivery (CI/CD)
Soft skills:
- Strong analytical and problem-solving skills
- Ability to quickly understand and maintain existing codebases
- Customer and solution-oriented mindset
- Team player with strong communication skills
- Autonomous, proactive, and quality-focused
The setting
This assignment runs for 4 months, starting as soon as possible and ending at the end of January 2027.
You will work in a hybrid environment in Brussels. Regular presence on site may be required depending on project needs and team activities.
You will collaborate with multidisciplinary teams across different public sector organisations.
Languages: French at expert level and English at working proficiency are required.
You can join us for this assignment as a freelancer or as an employee of HumanInTech. Same role, same team. If you join as an employee, your employment continues beyond this assignment. When it ends, we’ll work together to find your next assignment.
Location: Brussels, hybrid
Work address: Belgium
Employer / contracting party: HumanInTech
Applications close (Brussels time): October 31, 2026 at 1:00 AM
Engagement: Freelance or employed by HumanInTech
Working hours: Full-time
Experience: 6–10 years or more
Education: Bachelor's or more
Published: October 2026
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