Novancy, a leading staffing and recruitment firm specializing in Information Systems and Digital Transformation, is seeking a Senior C# ASP.NET Core Developer for a long‑term freelance contract. The successful candidate will work remotely, collaborating closely with our client’s development team to design, develop, and optimize applications that support payroll and temporary work processes.

Key Responsibilities

• Master and apply advanced concepts in C# and ASP.NET Core 8, including asynchronous programming, generics, and design patterns.
• Utilize Entity Framework Core to ensure optimal performance of generated LINQ and SQL queries.
• Design and optimize data models using PostgreSQL for efficient data management.
• Implement unit testing strategies using frameworks such as xUnit and Moq to ensure code quality.
• Contribute to the development of scalable architecture and optimize operations for large‑scale applications.
• Analyze complex problems and apply logical rigor to translate intricate business rules related to payroll and temporary work.
• Work independently and take responsibility for project deliverables.

Qualifications

• Mastery of C# and ASP.NET Core 8.
• Excellent knowledge of Entity Framework Core and performance optimization techniques.
• Proficiency in PostgreSQL for data modeling and optimization.
• Strong expertise in unit testing frameworks (xUnit, Moq).
• Experience in scalable architecture and optimization of large‑scale operations.
• Strong analytical skills and the ability to address complex problems.
• Knowledge of the temporary work/payroll industry is a significant plus.
• Self‑sufficient, responsible, and able to work independently.
• French language skills are required for this position.

What We Offer

• Long‑term freelance contract with competitive remuneration.
• Remote work flexibility.
• Opportunity to work on challenging projects in the payroll and temporary work sector.

To apply, please submit your résumé and cover letter through our platform. We look forward to collaborating with a dedicated professional who can drive excellence in our client’s digital initiatives.