1. User Research: Conduct user research to understand the needs, preferences, and behaviors of potential app users (both diners and restaurants). This may involve interviewing users, observing their interactions with similar apps, and analyzing user feedback.

UX Design: Creating wireframes, user flows, and prototypes to design the overall user experience of the app. This may include defining the information architecture, navigation, and interactions to ensure the app is easy to understand and use for diners to browse menus, place orders, and make payments.

UI Design: Designing the visual interface of the app, including color schemes, typography, iconography, and other visual elements that align with the brand identity of the startup and create an aesthetically pleasing experience for users.

Usability Testing: Conduct usability testing of the app to identify any usability issues and iterate on the design to improve the overall user experience. This may involve gathering feedback from real users and making design adjustments accordingly.

Collaboration: Collaborating with cross-functional teams, including product managers, developers, and other stakeholders, to ensure that the design aligns with the overall product vision and development requirements.

Responsive Design: Ensuring that the app is responsive and accessible across different devices, including smartphones, tablets, and desktops, to provide a consistent experience to users across different platforms.

Branding: Contributing to the branding efforts of the startup by creating a visually appealing and cohesive design that aligns with the startup's brand identity and values.

Keeping up with Design Trends: Staying updated with the latest design trends, best practices, and emerging technologies in the UX/UI field to continuously improve the design of the app and enhance the overall user experience.