Netflix Software Engineer Interview Questions

The questions to prepare for a Netflix Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

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Serialize and Deserialize Binary TreeHard

Serialize a binary tree to a string and reconstruct it exactly using preorder traversal with null markers.

RecursionHash TablesQueue

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Flatten Nested JavaScript Objects

Medium

Assesses ability to transform nested data structures and reason about recursion and traversal.

javascript

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DAG Task Scheduling

Hard

Tests ability to model and compute critical-path time for dependent tasks using DAG reasoning.

topological sort

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Deserialize Binary Tree

Medium

Evaluates understanding of tree traversal and efficient serialization/deserialization strategies.

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Technical Decision Under Uncertainty

Medium

Tests decision-making under ambiguity, risk assessment, and ownership when technical choices must be made quickly.

Decision MakingOwnershipDealing With Ambiguity

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DSP Order and Ad Unit TrackingMedium

Evaluates data modeling and distributed tracking design for ad delivery and order attribution.

Data Structures

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Netflix Adaptive Video Streaming Pipeline

Hard

Assesses ability to design large-scale streaming systems with ABR, encoding tiers, and CDN delivery.

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Netflix Password Reset System

Hard

Tests system design for secure, resilient account recovery under load and abusive traffic.

scalabilityrate limiting

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