Job Description

About the role

We are looking for a Senior Software Solution Architect to strengthen our Integration department.
In this role, you will take architectural ownership of complex, integration-heavy software solutions built on a NET Core and Azure-native stack.

You will operate at the intersection of architecture, development and integration design, ensuring robust communication flows, scalability, and long-term maintainability.

Depending on mutual fit and interests, you will be aligned with one of our strategic Brainsquare integration projects in Antwerp after the selection process. This is a freelance position, focused on impact, seniority, and architectural responsibility

Software Solution Architect (Freelance)

Your responsibilities:

• Design and govern end-to-end solution architectures for integration-centric platforms

• Translate functional and non-functional requirements into robust technical designs

• Define and enforce architectural patterns, coding standards, and integration principles

• Design event-driven and API-based communication flows

• Act as a technical reference for development teams

• Safeguard quality through logging, tracing, testing, and observability

• Collaborate closely with developers, stakeholders, and technical leads

• Support architectural decision-making throughout the full delivery lifecycle
  

Requirements

What we are looking for in you:

Required skills (MUST)

• Strong experience with C# and .NET Core!

• Solid knowledge of RESTful APIs

• Proven experience with SQL and data modelling

• Experience with containers (Docker)

• Strong focus on logging and observability

• Experience with automated testing (unit testing)

• Solid understanding of Git (status, pull, push, merge, clone)

• Ability to design robust communication flows and integration patterns

Preferred skills (SHOULD)

• Experience in an Azure environment

• ASP.NET Core Web API

• Serverless architectures, preferably Azure Functions

• Agile ways of working

• Integration testing, preferably using TestContainers

• Tracing and monitoring

• Knowledge of design patterns (e.g. Strategy, Mediator, Command, CQRS)

Nice to have (COULD)

• Domain-Driven Design (DDD) and aggregate roots

• Outbox pattern

• Vertical slice architecture

• Strong understanding of SOLID principles

• Experience with Azure DevOps

• Familiarity with Jira / Confluence

• Knowledge of NoSQL, Redis caching, Marten DB

• Experience with Kafka or service bus technologies

• Use of Fluent Assertions

Our selection process

• First interview - Introduction & experience deep-dive

• Technical interview - Architecture & integration focus

• Evaluation - Internal alignment

• Offer

Project alignment is discussed transparently during the process and depends on mutual fit and interest

What we offer to freelancers:

At Brainsquare, we believe in building meaningful partnerships. As a freelancer, you can expect:

• Engaging projects with leading clients where your architectural expertise has a strategic impact

• Clear and open communication from the initial briefing to project completion

• Efficient invoicing processes, ensuring timely payments and administrative support

• Access to our knowledge network, connecting you with peers and current tech tracks

• Flexible assignments aligned with your skills, availability, and ambitions

• A partnership approach, valuing long-term relationships over one-off engagements

Brainsquare is a company of lifelong learners. We pride ourselves on giving our employees extensive, continuous training, making them real experts in highly sought-after domains.

As a Solution Architect, you will get the flexibility and freedom to manage and organize your job autonomously, including partially working from home (3 days home office, 2 days onsite in Antwerp).

Why this role?

• High architectural impact on complex integration platforms

• Strong focus on quality, scalability, and maintainability

• Senior-level autonomy and responsibility

• Long-term collaboration mindset