1-JWT auth service (basically this refers to an auth service that handles user scopes, user authentication, implicitly add Bearer headers to all user requests, manage tokens...)
2- Lazy loading of components (aot compilation for angular, or dynamic import for react), this splits the front code into small chunks, so the download time is acceptable, especially for large front apps
3- Flex css & scss
4- Responsive design (we ll probably start from a template, but the app should stay responsible during the dev process)
7-Git workflow
8- A WEBRTC solution integration
9-Paiement widgets integration
10- Because the app will be public & accessible for large traffic, basic security measurements are required to protect sensitive user data, and protect against basic front end attacks..

More details if intersted