Application Architect

Job Title: Application Architect

Location: Brussels, Belgium (Hybrid)

Language: French, English

Duration: As soon as possible - 31/01/2027 + Extension Possible

Job Description

We are looking for consultants to strengthen the existing delivery teams involved in the development, integration, and evolution of critical public sector digital services.

The Client initiative aims to support the digital transformation of public administrations through the implementation of interoperable, secure, and scalable solutions facilitating laboration and information exchange between organizations. The program includes the development of new functionalities, the enhancement of existing platforms, and the adoption of modern software engineering practices.

Key activities include:

• Development and maintenance of business-critical applications and shared services.
• Integration with internal and external systems through APIs and service-oriented architectures.
• Modernization, optimization, and continuous improvement of existing applications and technical platforms.
• Contribution to the implementation of secure and resilient digital services supporting public sector organizations.

Languages

• French: Expert level
• English: Working proficiency

Responsibilities

• Development and maintenance of business applications and shared digital services.
• Development of application components, APIs, and web services.
• Contribute to the design of application architecture and technical building blocks in laboration with technical leads and solution architects.
• 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.
• Code review

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.
• Experience in public sector environments is considered an asset.
• Proven experience in Agile delivery environments.

Competencies

Technical knowledge and practical experience of the following technologies:

• 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.

Mission & Working Conditions

• The mission is carried out within a hybrid working environment.
• Regular presence on site may be required depending on project needs and team activities.
• Collaboration with multidisciplinary teams across different public sector organizations.
• Long-term assignment with potential extensions according to project evolution.

Skills,

Angular 16

API GATEWAY

Architecture application

Architecture technique

Business Analysis & Process Descriptions

Knowledge of IAM standards and protocols: SAML2, Open ID, OAuth, REST API...

Agile development and traditional development approach

Dollar universe

Integration Architecture

jboss 7.4

Jenkins

Open API

Openshift

Security (OWASP/OAUTH/OpenId/...)

Selenium

Spring Boot

Spring Framework

Test link

Tomcat