MINIX 3.2.1 System Calls in C language.

I am looking for a skilled programmer to implement File System Calls in C language for MINIX 3.2.1. The ideal candidate should have experience in system call implementation and be proficient in C programming. The project requires a detailed explanation of the implemented code with comments in the code. Additionally, I need test cases for the implemented system calls. The deliverables should include source code, a document with the code explanation, and test cases.