Senior ICT Solution Architect

Senior ICT Solution Architect - 3 Months - Brussels, Belgium

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Intro

RELYzIT Talent is seeking a Senior ICT Solution Architect for a high-impact, freelance assignment with our client in Brussels. This is a unique opportunity to architect the future of digital government platforms, shaping the backbone of a federated, modular ecosystem that will transform permitting and advisory processes across multiple policy domains. Join a mission-driven team where your expertise will directly influence the efficiency, predictability, and legal robustness of public sector digital services.

Why This Role Matters

As a Senior ICT Solution Architect, you will be instrumental in translating a visionary concept into a tangible, future-proof architecture for OmgevingOS—a modular, federated platform designed to streamline and modernize the permitting and advisory chain. Your work will enable seamless integration between existing systems, foster data-driven decision-making, and lay the foundation for a solution-focused ecosystem that empowers both government and citizens. The stakes are high: your architecture will drive efficiency, legal certainty, and innovation across a complex landscape involving 15 policy entities.

What You’ll Be Doing

• Designing and developing the solution architecture for OmgevingOS, ensuring alignment with the functional vision and business objectives.
• Creating integration models, API strategies, and data exchange frameworks to enable interoperability across diverse systems.
• Defining cloud and platform architectures, evaluating trade-offs between Azure, AWS, and on-premise solutions.
• Translating complex requirements into actionable technical scenarios and phased roadmaps.
• Conducting impact and risk analyses to inform solution scenarios within intricate application landscapes.
• Leading the development of migration, modernization, and transition architectures for legacy and new systems.
• Applying advanced modeling techniques (Archimate, TOGAF, UML, Sparx EA) to document and communicate architectural decisions.
• Collaborating with business analysts, enterprise architects, service designers, and strategists to define project scopes, governance, and knowledge-sharing frameworks.
• Contributing to the sourcing and procurement plan, and defining project management aspects such as costs, timing, coordination, and planning.
• Championing a shift-left approach—moving from remedial action to proactive guidance in the permitting process.

What We’re Looking For

• Proven experience as a Solution Architect in complex digital environments (Senior level).
• Specialist architect expertise in at least one domain: networking, security, server infrastructure, application architecture, ERP, ECM platforms, Data warehouse, BI, or as an Enterprise Architect (Senior level).
• Deep experience with API architecture and middleware solutions (Senior level).
• Expertise in application, integration, and solution architecture (Senior level).
• Hands-on experience with cloud-native architectures and evaluating Azure, AWS, and on-premise solutions (Senior level).
• Strong background in impact and risk analyses, and developing solution scenarios for complex application landscapes (Senior level).
• Experience with migration, modernization, and transition architectures (Senior level).
• Advanced knowledge of modeling techniques: Archimate, TOGAF, UML, Sparx EA (Senior level).
• Demonstrable experience within government environments and platforms such as Digitaal Vlaanderen (Medior level).
• Experience with data models, integrations, and migration strategies (Medior level).
• Familiarity with DevOps, CI/CD, and modern web architectures (Medior level).
• Expertise in Domain Driven Design and microservice architectures (Senior level).
• Understanding of business processes and project management aspects (costs, timing, coordination, planning, estimates).
• Comprehensive knowledge across all architecture domains, with proven specialist expertise in at least one (infrastructure, application, security, data, process).
• Ownership mindset, proactive problem-solving, and a drive for impactful outcomes.
• Ability to thrive in collaborative, multidisciplinary teams and communicate complex ideas clearly.

Technical Skills & Tools

• Solution Architecture (complex digital environments)
• API Architecture & Middleware Solutions
• Cloud-Native Architectures (Azure, AWS, On-Premise)
• Application, Integration, and Solution Architecture
• Migration, Modernization, and Transition Architectures
• Modeling Techniques: Archimate, TOGAF, UML, Sparx EA
• Domain Driven Design, Microservices
• DevOps, CI/CD, Modern Web Architectures
• Data Models, Integrations, Migration Strategies
• Project Management (costs, timing, coordination, planning, estimates)
• Government Platforms (Digitaal Vlaanderen)

Language Proficiency

• Fluency in Dutch at European CEFR level C2 is mandatory.

Other Requirements

• Demonstrable experience in government or public sector environments is highly valued.
• Experience working within multidisciplinary programme teams.
• Ability to contribute to governance, consultation, and knowledge-sharing frameworks.
• Strong documentation and communication skills.

About the Assignment

• This is a freelance position for a 3-month project based in Brussels, Belgium.
• You will join a select team of builders, including business analysts, enterprise architects, service designers, and strategists, all focused on delivering a future-ready platform for our client.
• RELYzIT Talent is committed to placing elite tech talent in roles that drive real impact and innovation.
• All candidates will be vetted through the VECTOR7™ Signal Stack, ensuring a premium, builder-first experience.