Senior Dotnet Developer

We are supporting a leading banking and financial services partner on several business-critical digital initiatives, including core system modernization, regulatory enhancements, and the evolution of customer-facing platforms. We are looking for an experienced .NET Developer with a solid understanding of frontend technologies to join a modern, highly regulated engineering environment.

Logistics

• Role: Freelance .NET Developer
• Contract: 12 months (likelihood of extension)
• Location: Brussels (Hybrid – 2 days/week on-site)
• Languages: English + French or Dutch
• Start Date: ASAP / Flexible
• Rate: Competitive & negotiable

Responsibilities

• Design, develop, and maintain scalable backend services using .NET / .NET Core
• Contribute to greenfield initiatives and long-term platform modernization projects
• Translate complex business and regulatory requirements into robust technical solutions
• Apply clean code practices, testing, and collaborative development approaches
• Support and evolve system architecture in line with modern best practices
• Build and maintain solutions within CI/CD pipelines
• Participate in code reviews and agile ceremonies
• Collaborate with frontend teams to ensure end-to-end solution quality
• Work on high-availability, security-sensitive financial systems

Required Skills

• 5+ years of experience as a .NET Developer
• Strong expertise in C#, .NET Core, ASP.NET
• Solid experience with REST APIs
• Good knowledge of relational databases (SQL Server, PostgreSQL, Oracle, or similar)
• Experience with CI/CD tooling and Git-based workflows
• Working knowledge of frontend technologies (Angular, React, TypeScript)
• Familiarity with Docker and modern deployment practices
• Comfortable working autonomously in Agile/Scrum teams

Nice to Have

• Experience in banking or financial services
• Exposure to legacy modernization or core system transformation
• Knowledge of security or regulatory constraints
• Experience with cloud platforms (Azure, AWS, or hybrid)
• Familiarity with event-driven or messaging-based architectures

Interested? Get in touch to discuss details and next steps.