Serious interview practice for experienced Android engineers facing senior and staff loops.
Answer realistic prompts, inspect weaknesses, revise your answer, handle changed constraints and compare attempts.
$59once
The interview book and companion code to keep, plus 90 days of Guided Practice. This purchase does not start a subscription.
No account needed for the sample · Book edition 1.0, released 10 September 2026
Most interview books fail at the moment the interview becomes real: the device goes offline after the user taps Pay, the process dies before the confirmation screen, a retry may repeat an operation that already succeeded. The memorised answer has nowhere to go.
The book gives you the explanations, examples, technical models and interview context. Guided Practice makes you answer before coaching, keeps the attempt, scores what an interviewer could observe, points to the first gap that changes the answer, and asks again after one constraint changes.
You work on Kotlin, coroutines and Flow, Compose state and lifecycle, architecture, offline systems, testing, performance, security, live coding, system design and leadership. You do not need to read the whole book before you begin. Start with the answer you least want an interviewer to examine.
Updates mean the current edition of the book and its companion files, for as long as Interview Runtime is operated.
The book gives you the models. Guided Practice makes you use them: you answer before you see the worked reasoning, the answer is kept, and the next attempt comes back with one constraint changed.
Your first attempt is saved before any coaching, so it stays an honest baseline.
Each answer is scored against the criteria written for that question. No AI model reads your answer, and the same answer always gets the same score.
The retry changes one fact, so a repeated answer does not pass for a repaired one.
The sample is the book as printed, not a summary. Judge the format and the voice before you buy.
No account needed
The table of contents as printed in the Android edition, with page numbers.
The interview is close. Diagnose, repair the primary gap, run the closest simulation, retry the largest remaining failure.
The first week isolates technical failures. The second combines decisions under pressure.
Room for staff and lead scope: system design, leadership stories and full loop rehearsal.
Staff engineer · Tech lead · Author
15+ years building production mobile software, and 500+ technical interviews from the hiring side, from early career screens through staff and engineering manager loops. This book is written from that side of the table: what an interviewer can observe, score and defend in the debrief.
Why I wrote this book. I kept writing “no hire” for engineers who knew the right answer and lost it at the first follow-up. Most preparation teaches the first answer. This book, and the practice built on it, is for the second one.
What staysThe PDF and EPUB books and the companion code. Download the current edition any time.
What endsGuided Practice and the online reader.
Your attemptsReadable, read-only, for 12 months: sign in to browse them, export them or delete them. Then they are deleted.
What continuesGuided Practice, only if you choose the optional membership ($14.99 a month or $149 a year, renews until you cancel). Nothing renews unless you start it.
Interview Runtime: Android Interview Preparation. Kotlin, coroutines, Compose and system design for senior and staff engineers.
Still deciding? Read the opening of the book first.
Android Interview Training, $59 once: the interview book and companion code to keep, plus 90 days of Guided Practice. This purchase does not start a subscription. Or both platforms in the Mobile Bundle, $89.
Android Interview Training$59 once · no subscription required
