Novancy, a leading staffing and recruitment consultancy specializing in Information Systems and Digital Transformation, is seeking a Senior C# ASP.NET Core 8 Developer to support a high‑profile client in the Temporary Work and Payroll industry. This long‑term freelance contract offers the opportunity to work remotely while delivering critical software solutions that drive operational efficiency and scalability.

Key Responsibilities

• Design, develop, and maintain robust backend services using C# and ASP.NET Core 8, ensuring clean architecture and adherence to industry best practices.
• Leverage advanced C# features such as asynchronous programming, generics, and design patterns to build performant, maintainable code.
• Optimize data access layers with Entity Framework Core, crafting efficient LINQ queries and fine‑tuning SQL statements for PostgreSQL databases.
• Define and refine PostgreSQL data models to support high‑volume transactional workloads.
• Implement comprehensive unit tests using xUnit and Moq, ensuring high code coverage and reliability.
• Collaborate with cross‑functional teams to translate complex business rules into scalable technical solutions.
• Take ownership of project deliverables, working independently while meeting deadlines and quality standards.

Required Profile

• Proven experience as a Senior C# developer with deep knowledge of ASP.NET Core 8.
• Strong background in Entity Framework Core, LINQ, and SQL performance tuning.
• Hands‑on expertise with PostgreSQL and data modeling for large‑scale applications.
• Experience in unit testing frameworks, particularly xUnit and Moq.
• Demonstrated ability to design scalable, high‑performance architectures.
• Excellent analytical and problem‑solving skills.
• Strong communication skills in French (required) and English (preferred).

Why Join Novancy?

Novancy offers a dynamic work environment where talent meets opportunity. As a freelance contractor, you will enjoy flexible working arrangements, exposure to cutting‑edge technologies, and the chance to collaborate with a dedicated team focused on delivering excellence to clients across the globe.

To apply, please submit your résumé and a brief cover letter outlining your relevant experience and why you are the ideal candidate for this role. We look forward to exploring how your expertise can contribute to our client’s success.