Mobile Engineer practice interview

Native or cross-platform apps that stay fast and reliable on real devices and networks. Practise the 5 questions interviewers ask for this role with follow-ups. Paid plans add scored feedback on every answer.

Practise this interview free

Free with an Intaviu account: 320 credits a month, at 10 credits a minute of practice. Private: interview creators never see them.

Mid level
20 minutes
5 questions
Scored feedback on paid plans

About the role

A mobile engineer builds apps for phones, either natively or with a cross-platform toolkit, and keeps them fast, stable and light on data and battery. The work covers screens and navigation, offline behaviour, crash fixing, app store releases and agreeing APIs with backend teams. The panel wants proof that you understand how apps behave on real devices, not just in an emulator.

How to prepare

Pick an app you shipped and be ready to walk through its architecture, state handling and how you tested it.
Think through how your app copes with no network, a weak signal and a user switching apps in the middle of a task.
Prepare a story about a crash or performance problem you tracked down, including the tools you used and the fix.
Revise the release process: signing, staged rollouts, store reviews and how you handle a bad build already in users' hands.
Be ready to weigh native against cross-platform for a given product, giving fair credit to both approaches.

Common mistakes

Only testing on a new flagship phone and ignoring the older devices most users carry.
Ignoring app size and data use, which matter a lot to users paying for every megabyte.
Describing features you built without saying how you tracked crashes and performance after release.

What to expect

A real first-round interview

5 questions the way interviewers ask for this role, with follow-ups when an answer needs more.

Spoken, like the real thing

Speak your answers in your browser or the free desktop app, with live captions. You can ask the interviewer to repeat anything.

Scored on 5 areas

The things this interview weighs most. With a paid plan, your report shows how you did on each one.

A private report

On Plus, Pro and Premium: every answer scored, your strongest lines quoted and what to say differently next time. Interview creators never see it.

Free with an Intaviu account. Ready when you are.Practise this interview free

Engineering