Netflix Interview Questions
Practice 97 real Netflix interview questions for 2026 — Netflix interview questions tailored for high-impact engineering and data roles. Covers all top categories — Coding & Algorithms, System Design, Behavioral & Leadership, Analytics & Experimentation, and Data Manipulation (SQL/Python). Real questions from actual interviews with detailed solutions to power your interview preparation and sharpen the problem types Netflix favors. Expect a coding- and design-heavy process: Software Engineer loops dominate, followed by Data Scientist, Machine Learning Engineer, and Data Engineer screens. For Software Engineers (42 questions) the emphasis returns again and again to ads-platform design (frequency capping, demand-side schemas, ad data models), product-facing rendering and deduplication for the homepage, concurrent systems and latency-percentile tracking, plus algorithm problems on trees, graphs and sliding-window arrays. Data Scientists (28) focus on causal inference and experiment analysis (ATE/ITT/TOT/LATE, noncompliance), ranking A/B tests, conversion propensity models and SQL retention cohorts alongside core probability. Machine Learning Engineers (7) test ML platform and scheduling design plus transformer/tokenization fundamentals; Data Engineers (3) emphasize reliable click aggregation, config rollout strategies, and search/JSON-path implementations. Prepare by practicing representative coding problems, system designs, experiment writeups, and clear metric-driven stories.

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Aggregate D1 retention cohorts in SQL
Today is 2025-09-01. Using SQL (optionally outline a pandas approach too), compute daily engagement and D1 retention for the last 7 days (2025-08-26 t...
Implement rotating homepage title selector
Implement an in-memory service that chooses which movie or show title to display on a user's homepage billboard. Each title has a relevance score for ...
Find user pairs with overlapping last K movies
You are given the same user movie-watching histories as in the previous problem. Each user’s history is an ordered list of movie IDs from earliest to ...
Dedupe titles in per-shelf viewport
You are rendering a streaming app home page. - The home page consists of shelves displayed from top to bottom. - Each shelf contains a list of titleId...
Design playlist with add/remove/shuffle
Music Playlist Data Structure Design an in-memory Playlist data structure that supports the following operations on a set of songs: - add(songId): Add...
Design a robust conversion propensity model
Daily Notification Propensity Model (Top-20% Targeting) Context You need to score users once per day with the probability they will make a purchase wi...
Group users by same last K watched movies
You are given a list of users' movie-watching histories. Each user’s history is an ordered list of movie IDs in the order they were watched (earliest ...
Design an ML job scheduler
Design a system that accepts user-submitted machine learning jobs and schedules them across multiple compute clusters containing heterogeneous CPU and...
How would you support ML stakeholders?
You are an ML infrastructure engineer working closely with a data scientist stakeholder. Discuss how you would handle the following situations in a pr...
Describe Leading a Project from Ideation to Delivery
Behavioral & Leadership (Data Scientist — Onsite) Scenario A hiring manager wants a deep dive into your most impactful project to gauge ownership, tec...
Compute minimum semesters to finish courses
You are given n courses labeled 1..n and a list of prerequisite relations prereq, where each element is a pair [a, b] meaning you must complete course...
Implement Streaming Word Counter
Implement a class that records word frequencies from a stream of text. The class should support the following operations: 1. add_text(text: str) -> No...
Implement longest increasing subarray with one deletion
Given an array of integers nums, return the length of the longest strictly increasing contiguous subarray you can obtain by deleting at most one eleme...
Model advertiser intake database schema
Advertiser Intake and Campaign Data Model (F1-style) Context You are designing a multi-tenant advertiser intake and campaign configuration system. The...
Highlight Netflix Culture Principle in Past Work Example
Behavioral Interview: Culture Fit and Project Walkthrough Context You are interviewing for a Data Scientist role and have an initial HR screen assessi...
Design an ad frequency capping system
System Design: Ads Frequency Capping You are designing an ad-serving platform (e.g., for a streaming service with ads). The product requires frequency...
Design an ML Platform Portal
Design a web-based internal platform that gives machine learning engineers and data scientists a unified workflow for the full model lifecycle. The po...
Determine Maximum Consecutive Order Days Per User
orders +----+---------+------------+ | id | user_id | order_date | +----+---------+------------+ | 1 | 101 | 2024-01-01 | | 2 | 101 | 2024-0...
Design experiment on culture memo emphasis
A/B Test Design: Prominently Feature the Culture Memo on Job Description Pages You are designing an experiment to evaluate whether prominently featuri...
Implement topological sort from string input
You receive N lines of raw text describing task dependencies, e.g., 'install A after B', 'C->A', 'B before D'. Implement a function that: ( 1) parses ...