Solution Architect – DDD / .NET & Functional Approach

Project overview

Solution Architect – DDD / .NET & Functional Approach

Long-term freelance mission | Start ASAP

Do you enjoy designing architectures, but also understanding the business processes and the needs they address?

We are looking for a Solution Architect with strong expertise in Domain-Driven Design and a genuine interest in the functional side.

The Context

You will join a team of seven and contribute to the evolution of an information system combining legacy Mainframe/Cobol applications with modern .NET technologies.

The challenge is, in particular, to design application layers structured according to DDD principles above existing systems, to support their progressive modernization. You will also be involved in projects that remain within the legacy environment, where understanding business operations is essential.

This is a design and support role: you will not be doing the implementation, and no Cobol programming knowledge is required.

Your Role

• Interact with the business and analysts to understand needs, business rules, and existing processes.
• Design solution architectures consistent with these needs and the information system's constraints.
• Apply Domain-Driven Design principles to structure business domains and their translation into the architecture.
• Define the articulation between legacy systems and new .NET applications.
• Present and defend your choices to the architecture committee.
• Support teams in understanding solutions and develop in-depth knowledge of the business domain.

Requirements

Why this mission?

A long-term mission for an architect who wishes to invest in a complex business domain and contribute to its evolution. Understanding the functional aspects is as important as the quality of technical choices.

Interested? Contact me to discuss it and learn more about the context.

• Solid IT experience, complemented by significant experience as a Solution Architect.
• Concrete experience with DDD, ideally in a context of modernization and integration with legacy systems.
• Good knowledge of the .NET ecosystem and modern architectures.
• A strong interest in functional analysis: you enjoy understanding how systems work and why the business needs them.
• The ability to communicate with both business stakeholders and analysts and architects.
• Proficiency in ArchiMate for modeling and communicating your architectures.
• French and English are essential. Dutch is an asset.

Project details

• Start: 23/11/2026
• Location: Brussels, Belgium, BE
• Languages: French