Test REST APIs (Find Bugs) and Write Technical Documentation

I have 12-15 APIs (RESTful) from my SaaS which either sends information to server or fetches information from server. I need someone with development background (PHP/Curl or similar) to test these APIs and then also write technical documentation (Functional Specs or Test Specs, Software Solution Review, etc)// Testing will involve testing our GUI (which exercises APIs), writing/ modifying API test programs directly (command line) and/or POSTMAN ways. You would also simulate various front end users consuming APIs so we can find issues/ bugs. This is development cum testing (not coding / designing work). Your English needs to be proficient and documentation skills need to be top notch. I might ask for some samples or ask you to write one or two page for a common software product we all may know. (1)Work will involve learning SaaS / Features/ Requirements from me - 3 hours (2 sessions) (2) Updating/ Modifying Test Scripts (API testers) - 3 hours (3) Test Execution (various conditions/ simulate user needs) through GUI/ Test Scripts - 10 hours (4) Technical Documentation (end to end system overview, test plan, etc) - 3-4 documents of 15-20 pages each - 9 hours === Total 25 hours (solid hours)