Looking for php expert who is advance level

Hi. i have custom website and even framwork is custom . it is php7.0 but all custom everything. but when i change Apache server to ngnix server, i got so many errors and need to fix all . also , need to create some new things. and i have no time so i wish who is working on weekday and full time with me. hopefully only bid on this project who can analysis very fast as you can. and you must be freelancer. not second job for this project !