Require expert in writing custom IIS redirect rules / patterns (IIS 10 windows server) to redirect existing URL's to newly defined URL's on same site. Site developed in .net core.

Require expert in writing rules using middleware and .net core. Need to discuss which solution is best for SEO and performance.

All redirects should be done using 301 permeneant redirects to ensure all old versions of URL's link to same pages and that no old links are broken.

Good understanding of SEO and passing link juice / best options to boost SEO or retain rankings is prefered.