Our client, a large public-sector organization operating mission-critical transport and planning systems, is seeking a Senior Solution Architect to design and safeguard complex integration-heavy solutions. The role focuses on end-to-end architecture, API contract design, and hands-on technical oversight in a multi-channel, cloud-based integration landscape.
This is an execution-oriented architecture role that combines design authority with active involvement in troubleshooting, integration validation, and delivery assurance.
Responsibilities:
* Translate business requirements into end-to-end technical architectures aligned with enterprise standards.
* Design and govern API contracts using OpenAPI and established integration patterns.
* Ensure scalability, security, performance, and reliability across solution designs.
* Provide hands-on technical support during implementation, including troubleshooting complex integration issues.
* Review and validate supplier solutions to ensure compliance with architectural and security guidelines.
* Support onboarding of new business changes within existing integration landscapes.
* Contribute to audits by assessing solution conformity with internal standards.
What are we looking for?
* You have a minimum of
7+ years of experience
in a solution or technical architecture role.
* You bring at least
5+ years of experience
designing
API contracts
and integration interfaces.
* You possess strong knowledge of
API-first architectures
,
microservices
, and
cloud-native design principles
.
* You have hands-on experience with
Azure
and modern integration patterns.
* You bring experience with middleware or integration platforms such as
Axway
or equivalent tools.
* You are comfortable troubleshooting performance, security, and reliability issues in complex integration landscapes.
* You are fluent in
English
and
French or Dutch
.
Nice to Haves
* Experience with containerization and orchestration technologies.
* Exposure to DevOps and CI/CD pipelines.
* Experience with monitoring and observability tooling.
What do we offer?
* Start date: 16/03/2026
* Duration: until 29/02/2028
* Work regime: Full-time
* Location: Brussels
* Working model: Hybrid (minimum 2 days onsite)
* Contract: open to both permanent employees and freelancers