UI redesign - Enhancement system additions front end only

I am looking for a UI designer to redesign the front end of my enhancement system. The main focus is on updating the design to match our current branding. The ideal candidate should have experience in customizing designs to meet branding requirements. The timeline for completion is more than 3 months, so the candidate should be able to manage their time effectively. The specific enhancements we need are improved navigation and additional features. The candidate should have a minimalist or modern design style and be able to implement our requirements effectively.