Senior UX/UI Product Designer for iOS App

I’m looking for an experienced Senior Product Designer (UX/UI) to audit, refine, and complete the design of my iOS social media app and its marketing website. The product vision, branding, user flows, and most screens have already been defined, so this is not a project to redesign the concept from scratch. Instead, I need someone who can identify any missing screens, user journeys, edge cases, interactions, and functionality, refine the UI to a premium, Apple-quality standard, and ensure every feature is fully designed, consistent, and ready for development. You should be highly experienced in Figma, iOS design, design systems, and creating production-ready files. Experience designing social or consumer mobile apps is highly preferred. The website should also be refined to match the app and optimise user acquisition and conversions. The goal is to deliver a complete, polished product with nothing overlooked before development begins.