Thread sync on Unx using POSIX thread lib, pthread

I am looking for a skilled programmer who can help me with thread synchronization on Unx using the POSIX thread library, pthread. Currently, my project is facing a race condition issue. The project is written in C, so experience in this language is crucial. I specifically require the use of Mutex for the pthread implementation.

Ideal Skills:
- Proficient in C programming language
- Experience with POSIX thread library, pthread
- Strong knowledge of thread synchronization techniques
- Familiarity with Mutex implementation

If you have the required skills and experience, please reach out to me with your proposal. Thank you.