WordPress Website Management and improvement Needed

I’m looking for a skilled developer who can help creating new features for my WordPress plateform. Here’s what I need: • Create new features in a existing plateform (forms, Website login system, creating storefront space for partners • End-to-end WordPress setup and configuration • Custom-designed, mobile-responsive pages that load quickly • SEO-friendly structure and clean code for easy future updates • Security hardening and basic performance optimization • Clear hand-off documentation so I can manage content on my own