User Experience (UX): Should have good experience on Stakeholders Interview, Competitor analysis, Personas, Heuristic Evaluation, Information Architecture, Feature List, Card Sorting, Paper Prototype, User Flow, Task Flow, Usability Testing, UCD Method (User Centered Design), Wireframe, Sitemaps Etc.
Axure RP & Adobe XD (Wireframe Creations): Should have good experience in these tools for Creates the INTERACTIVE WIREFRAMES.
Good to have:
User Interface (UI): Branding, Typography, Look and Feel, Coloring, Layout Setting, Consistency, Etc.
Visual Designs (VD): Adobe Photoshop, Adobe Illustrator Following Android Material Designs & IOS Guidelines, Maintain the Pixel Perfections, Creates the LOGO, ICONS, and providing SVG (or) PNG Format icons and logo to Developers.
Style Guidelines: Document creates by PowerPoint, this document useful for developers, it contains all details about our designs, Pixels details like (Height & Width of pixels), Typography, Colors details, Branding Details, 9 patch Images.