This is a senior-level Backend Developer position at Tek Spikes, focusing on .NET/C# development. The role is available in multiple major US cities including Seattle, Dallas, and Chicago. This is a contract position that requires on-site presence. The position likely involves developing and maintaining backend systems and services using Microsoft's technology stack, particularly .NET and C#. As a senior role, it would involve technical leadership, system architecture, and complex problem-solving responsibilities. The position would be ideal for experienced developers with strong expertise in Microsoft technologies and backend development practices. The role offers the opportunity to work in a professional environment across multiple potential locations, providing flexibility in terms of work location while maintaining the benefits of in-person collaboration.