The app consists in your own CV app. You can pick some ideas from the following list (not limited to this):
Professional summary.
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.
Considerations:
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
Dear Sir/Madam,
I am interested in developing your application natively for Android, I have experience using Firebase as my backend and Git for version control in many of my projects. Firstly, let me give you a little background about myself. I am currently working as a freelance mobile developer in a digital nomad lifestyle, in the past I have worked for an Australian company and a German startup in full time positions developing mobile applications. I have over 5 years of industry experience and one year of freelance experience as a native Android developer both with personal and contracted projects.
I would be happy to discuss the project further with you if you are interested and to answer any questions you may have about my experience, I could give you some examples of my work and if necessary I can provide my CV for you. I look forward to hearing back from you soon.