Javascript Redirect and Cookie Developer

I need a competent Javascript developer with experience in creating redirects and setting cookies. The script is very simple but needs understanding of redirection logic.

- create a javascript redirect which redirects from domain1 -> domain2 -> domain3
- Create code transmission like ?ok= from domain1 -> domain2 -> domain3
- must use only javascript for redirection, no htaccess usage
- create backend_1 with login (user/pass) with table and row: MD5;IP;COUNTRY on domain2
- create backend_2 with login (user/pass) with table and row: MD5;IP;COUNTRY on domain3
- save IP and COUNTRY on domain2 and domain3 (which will be both always behind cloudflare) based on Cloudflare's features, HTTP_CF_CONNECTING_IP and HTTP_CF_IPCOUNTRY
- log if md5 hash used and save the md5 hash to backend_1 if on domain2 and to backend_2 if on domain3
- if no md5 is found DO NOT redirect anywhere (if missing after ?ok=)
- create specific cookie to log registrations on a 3rd backend
- create export feature

More details available after bid.