Senior .Net Software Engineer (Freelance)

About Brainsquare

Brainsquare is a solution provider specialized in Application Development, Application Integration, and Atlassian Collaboration Tools.

We operate in complex enterprise environments where we design, build, and support scalable application landscapes and integration platforms. Our consultants work closely with clients to deliver long-term value, combining hands-on expertise with architectural thinking.

Your Role

As a Senior .NET Software Engineer, you will join a high-impact enterprise environment in the Antwerp region.

You will be part of a team responsible for building and evolving a business-critical platform that supports operational processes in a technical and integration-heavy context.

Your focus will be on:

• Developing and improving .NET-based applications and APIs
• Working on system integrations with external and industrial systems
• Ensuring stability, performance, and reliability towards go-live
• Contributing to technical and architectural discussions
• Supporting a pragmatic, delivery-driven environment

Your Responsibilities

• Design and develop backend services and APIs using .NET
• Analyze and improve data flows, integrations, and system interactions
• Contribute to error handling, logging, and performance optimization
• Work closely with analysts and other engineers to translate requirements into solutions
• Participate in code reviews and technical discussions
• Support the team in delivering a robust and scalable solution

Your Profile

• Minimum 5–8 years of experience in .NET development
• Strong knowledge of C#, .NET Core / .NET, and API development
• Experience with SQL and backend data processing
• Solid understanding of system integrations and distributed systems
• Experience in enterprise environments
• Familiar with Agile/Scrum methodologies
• Strong communication skills in English; knowledge of Dutch is a plus

Nice to have:

• Experience with Azure or cloud environments
• Knowledge of event-driven architectures (Kafka, messaging, …)
• Experience with industrial or IoT-like integrations

What We Offer

• Long-term collaboration within enterprise environments
• Projects with real impact and technical complexity
• A mix of hands-on development and architectural input
• Hybrid working model (2 days onsite, 3 days remote)
• Competitive daily rate aligned with market standards
• Opportunity to grow into future strategic projects and roles

Why Join Brainsquare

At Brainsquare, you don’t just join a project - you become part of a broader journey across multiple enterprise environments.

We focus on:

• Building long-term partnerships
• Offering continuity between projects
• Creating opportunities to grow into more senior or lead roles

Ready to Apply?

Apply now and become part of a team where technical expertise, ownership, and collaboration are key