PHP programmer for adult business

We have an adult review website coded in PHP that is nearly finished but needs a number of modifications. This includes fixing certain aspects of our database, our site's search functions, menu headings, modifying links and adding text to certain parts of the site. We would ask anyone we hire to e-sign a hiring contract which will include a non-disclosure agreement. We would prefer to give you a part of this assignment at a time, and upon successful completion, we will keep giving you assignments.