Instacart Mobile Engineer Interview Questions

The questions to prepare for a Instacart Mobile Engineer interview. Questions from real interview reports rank first. Updated daily.

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CodingStart here. 26 questions · ~285 min

Process cart mutations and compute the final Instacart cart subtotal using a hash map.

Grocery Challenge Screen From APIMedium

Practice

Transform an API question into a four-image challenge state and evaluate the selected image.

api integrationandroidArrays

Instacart

Find and Fix a Memory LeakMedium

Practice

Detect unreleased allocations in an event log and append cleanup operations while preserving allocation order.

memory leakCodingData Structures

Instacart

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System Design10 questions · ~110 min

Design the Instacart Android shopping cart, including state, persistence, synchronization, and checkout handoff.

Design Instacart Cart SystemHard

Design Instacart’s cart with reliable mobile synchronization and ML-assisted item ranking.

ML Rankingmobile architectureoffline sync

Instacart

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Technical Fundamentals3 questions · ~33 min

Native UI vs Custom Drawing Trade-offsHard

Compare native UI components with custom drawing frameworks across accessibility, performance, maintainability, and platform integration.

android lifecycleiOSTrade-offs

Instacart

Optimize List Performance and Image RenderingMedium

Evaluates performance tuning for large lists and image-heavy UIs on mobile.

performance optimizationlarge datasets

Instacart

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Behavioral & Leadership10 questions · ~110 min

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