Senior ICT Solution Architect

Company : Relyzit

Job Description - 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.