Staff Android Engineer - Walmart
- Result
- Rejected
- Posted
- 2 Oct 2025
Summary
I interviewed for a Staff Android Design Engineer position at Walmart, which involved a hiring manager round focusing on my past experiences and views on future tech, followed by a technical Android round with questions on core concepts and problem identification. Unfortunately, I was rejected after the second round.
How it went
I recently interviewed for a Staff Android Design Engineer role at Walmart. The interview process consisted of two rounds.
My first round was with the Hiring Manager. We discussed my previous experiences and had a deep dive into my current work. We also touched upon my views on GenAI and the future of mobile technology, along with the reasons I was looking for a change.
The second round was focused on Android questions. This round presented a mix of questions covering the basics of Android. I was also given several code snippets and asked to identify possible faults and errors within them. Specific topics we discussed included a deep dive into RecyclerView internals and Layout Managers, the Garbage Collector and its impact on the main thread, concepts around Custom Views and Overdraw, strategies for avoiding Jank and Lags, and the use of Profilers and dealing with Memory Leaks. We also covered Coroutine Concepts, Fragment Transactions, concurrency, and questions related to lifecycleScope and LifecycleOwner. The team I interviewed with primarily used traditional XML views, so the questions were majorly focused in that area.
Ultimately, I was rejected after Round 2.
Questions asked (6)
- 01
RecyclerView Internals & Layout Managers
Other
Discuss the internal workings of RecyclerView, including how it recycles views and interacts with different Layout Managers.
- 02
Garbage Collector & Main Thread Impact
Other
Explain how the Java/Android Garbage Collector works and its potential impact on the main thread's performance.
- 03
Custom View & Overdraw Concepts
Other
Discuss the concepts behind creating Custom Views in Android and how to manage and avoid Overdraw.
- 04
Android Performance: Jank, Lags, Profilers, Memory Leaks
Other
Explain strategies for avoiding UI Jank and Lags in Android applications. Discuss the use of Profilers for performance analysis and techniques to identify and fix Memory Leaks.
- 05
Kotlin Coroutine Concepts
Other
Explain the fundamental concepts of Kotlin Coroutines, including structured concurrency, dispatchers, and common use cases.
- 06
Fragment Transactions, Concurrency, LifecycleScope & LifecycleOwner
Other
Discuss Android Fragment Transactions, managing concurrency within Fragments, and the usage and purpose of
lifecycleScopeandLifecycleOwner.