The app consists in your own CV app. You can pick some ideas from the following list (not limited to this):
Topics of knowledge / technical.
Past experience: company name, role name, date from - to, main responsibilities, achievements, company logo, etc.
Keep all the data on firebase.
The development should be approached as production code.
Privilege quality over quantity.
Good engineering principles.
You can use your own CV or fake data alternatively.
Push your repo into Github and send the link