Novancy, a leading staffing and talent recruitment firm specializing in Information Systems and Digital Transformation, invites applications for a Senior C# ASP.NET Core Developer on a long‑term freelance contract. The role is fully remote, offering flexibility while delivering critical solutions for the Temporary Work and Payroll industry.

Key Responsibilities

• Design, develop, and maintain robust applications using C# and ASP.NET Core 8, ensuring adherence to best practices and performance benchmarks.
• Apply advanced concepts such as asynchronous programming, generics, and design patterns to create scalable, maintainable code.
• Leverage Entity Framework Core to optimize LINQ and SQL queries, ensuring efficient data access and manipulation.
• Model and optimize PostgreSQL databases, focusing on data integrity, indexing, and query performance.
• Implement comprehensive unit testing strategies with xUnit and Moq, driving code quality and reliability.
• Collaborate with cross‑functional teams to translate complex business rules into technical solutions, particularly within the Payroll and Temporary Work domain.
• Own project deliverables, manage timelines, and communicate progress to stakeholders.

Qualifications

• Proven mastery of C# and ASP.NET Core 8.
• Deep knowledge of Entity Framework Core and performance optimization.
• Strong PostgreSQL experience for data modeling and optimization.
• Proficiency in unit testing frameworks (xUnit, Moq).
• Experience designing scalable architectures for large‑scale applications.
• Excellent analytical and problem‑solving skills.
• Knowledge of the Temporary Work/Payroll industry is a significant plus.
• Self‑sufficient, responsible, and capable of working independently.
• French language skills are required.

What We Offer

• Long‑term freelance engagement with competitive compensation.
• Remote work flexibility, enabling a balanced work‑life environment.
• Opportunity to work on high‑impact projects within a dynamic, client‑centric organization.

To apply, please submit your résumé and cover letter through Novancy’s platform. We look forward to exploring how your expertise can contribute to our client’s success.