Looking for UI UX improvement in an existing app -- 2

Looking for ui/ux improvements for an existing mobile app in production along with backlog items; should be able to suggest best UI and UX and be able to provide assets and best user experience to upgrade the existing ui and ux. The app is native and is on both appstore and playstore already. The business functionality of the app is on Maps with service providers and service requestors to connect and get their work done. Interested candidates - share your similar work experiences with playstore/appstore links and candidates, who can prove they worked on those apps will be considered. Note: this project is for both UI and UX; and backlog will be shared with shortlisted person. The execution approach of the entire engagement may be divided into following 4 phases. 1. Design Thinking : In this phase, you will be actively working on Gathering and evaluating user requirements, in collaboration with business and technology team Illustrating design ideas using sketches, wireframes, etc., Share mock ups, if need be, for the proposed final User Interfaces and User Experience 2. Designs Development: In this phase, you will be actively working on Create original graphic designs (e.g. images, sketches and tables) Create and deliver an agreeable UX Walkthru the designs with stakeholders, dev team as required 3. Design Iterations: Modify UI/UX per any final changes/revisions Clarify any questions/issues from business and support team 4. Design Support: Support the finalized designs for 60 days incase of any issues or bugs This might involve a little amount of work like managing image sizes etc.,