Performance Optimization of Existing .NET core Software

I'm seeking an experienced developer proficient in .NET, C#, and C++. I have existing software that requires rebuilding after making some changes to improve performance, particularly in speed and response time.

Key Requirements:
- Optimize handling of HTTP requests to eliminate performance bottlenecks
- Rebuild existing code with modifications
- Implement necessary changes to improve speed and resource utilization

Ideal Skills and Experience:
- Strong background in .NET, C#, and C++
- Proven experience in performance tuning, especially in HTTP request handling
- Ability to understand and modify existing codebases
- Detail-oriented and committed to delivering high-quality work

Please only serious developers with relevant experience.