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NETFLIX · SENIOR SOFTWARE ENGINEER (SDE 3)

Netflix senior engineer interview

The senior software engineer (SDE 3) level at Netflix is L5 Senior Software Engineer, for senior engineers with about 5 to 10 years of experience. The rounds at this level, how each one is scored, and the questions to practise first.

From public candidate reports and Netflix's careers pages, checked November 2026. Processes vary by team. AlgoRung is not affiliated with Netflix.

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Netflix titleL5 Senior Software Engineer
ExperienceSenior engineers with about 5 to 10 years of experience
Interviews after screeningAbout 7
System design roundYes

The Senior Software Engineer (SDE 3) rounds, in order

  1. Phone / recruiter screen · 30 min

    A recruiter call on background and motivation, which also checks whether you know the culture memo.

    At Senior Software Engineer (SDE 3): Often a coding problem plus questions about your past systems; some companies (Uber) use it to set your level.

  2. Coding (DSA) · 60 min

    The technical screen is live coding, usually a practical problem tied to the team's domain rather than a puzzle.

    At Senior Software Engineer (SDE 3): Usually two rounds. Same difficulty, but interviewers expect quick, confident problem solving and production-quality code.

  3. Hiring manager · 45 min

    The hiring manager goes through your past work and team fit; on some teams this happens after team matching.

    At Senior Software Engineer (SDE 3): Technical leadership, mentoring, and how you choose what to work on.

  4. Coding (DSA) · 45 min

    Onsite coding is practical and open-ended (caches, data modeling, concurrency) and builds on follow-up questions.

    At Senior Software Engineer (SDE 3): Usually two rounds. Same difficulty, but interviewers expect quick, confident problem solving and production-quality code.

  5. System design (HLD) · 60 min

    An open system design discussion, often framed around the team's own area such as ads, streaming or recommendations.

    At Senior Software Engineer (SDE 3): One or two rounds that set your level. Expected to lead, size the system and go deep on two or three hard parts.

  6. Team-specific round · 45 min

    Some senior loops add a concurrency, debugging, craftsmanship or operations round chosen by the team.

    At Senior Software Engineer (SDE 3): Project deep dives become central: scope, trade-offs and what you would do differently.

  7. Behavioral × 2 · 45 min

    Culture rounds test each value in the culture memo with real stories.

    At Senior Software Engineer (SDE 3): Expected scope: projects across quarters, influencing other teams, mentoring.

What Netflix interviewers look for

Behavioral rounds are based on the Culture memo: Selflessness, Judgment, Candor, Creativity, Courage, Inclusion, Curiosity, Resilience. Questions for each one.

Coding questions to practise for Netflix Senior Software Engineer (SDE 3)

Usually two rounds. Same difficulty, but interviewers expect quick, confident problem solving and production-quality code.

Difficulty
Topic
9 questions
  1. LRU Cache Medium Design Data Structures also Amazon, Microsoft, Apple +4
  2. Time Based Key-Value Store Medium Binary Search also Apple
  3. Course Schedule Medium Graphs also Google, Amazon, Uber +1
  4. Valid Parentheses Easy Stack also Apple
  5. Best Time to Buy and Sell Stock Easy Dynamic Programming also Amazon, Apple, Walmart Global Tech
  6. Merge Intervals Medium Intervals also LinkedIn, Atlassian, Oracle
  7. Longest Substring Without Repeating Characters Medium Arrays & Hashing also Amazon, Adobe, Flipkart
  8. Kth Largest Element in an Array Medium Heaps
  9. Lowest Common Ancestor of a Binary Tree Medium Trees & BST also Google, Meta, Atlassian +1

How the coding round is scored · The online assessment

System design at Senior Software Engineer (SDE 3)

Design comes up from mid-level and gets heavier at L5 and above. It is open-ended and often tied to the team's domain; senior candidates lead the discussion and work through build-vs-buy, operational and failure trade-offs.

All Netflix system design questions

Questions people ask

How many rounds are in the Netflix Senior Software Engineer (SDE 3) interview?

About 7 interviews after the screening: phone / recruiter screen, coding (dsa), hiring manager, system design (hld), team-specific round, behavioral.

Is there a system design round for Netflix Senior Software Engineer (SDE 3)?

Yes. Design comes up from mid-level and gets heavier at L5 and above. It is open-ended and often tied to the team's domain; senior candidates lead the discussion and work through build-vs-buy, operational and failure trade-offs.

What coding questions does Netflix ask at Senior Software Engineer (SDE 3)?

The same question pool is used across levels; the bar rises with level. Most reported: LRU Cache, Time Based Key-Value Store, Course Schedule, Valid Parentheses, Best Time to Buy and Sell Stock.

What does Netflix expect in coding rounds at Senior Software Engineer (SDE 3)?

Usually two rounds. Same difficulty, but interviewers expect quick, confident problem solving and production-quality code.

Senior Software Engineer (SDE 3) interviews at other companies

Senior Software Engineer (SDE 3) interview questions across all companies · Behavioral questions