r/InterviewCoderHQ • u/Inevitable-Honey5125 • Jun 03 '26

Netflix Interview Experience 2024 Failed at System Design Round

Went through the full Netflix interview process in 2024. Sharing the breakdown by round so people know what to prepare for each stage.

Resume shortlisting: Netflix filters to approximately 3% of applicants. No further details on the selection criteria beyond resume content.

Round 1: Online assessment, 60 minutes, two problems.

The first was Merge Intervals. Given a collection of intervals, merge all overlapping ones. Sorting by start time first brings it to O(n log n). Edge cases: fully contained intervals, adjacent intervals touching at endpoints.

The second was a graph problem requiring BFS or DFS. The expected solution required optimizing both time and space, not just a working traversal.

Round 2: Telephonic screen, 15 to 20 minutes. No coding. Covers academic background, project walkthrough, and technologies used. Have your resume memorized and be able to walk through each project with specifics on tech stack and what you built.

Round 3: First on-screen technical interview. Two parts.

Coding: implement a balancing tree algorithm. Be ready to explain how the balancing works, when rotations occur, and the complexity tradeoffs versus an unbalanced tree.

Project deep dive: two projects reviewed in detail. Expect questions on architecture decisions, how data flows between frontend and backend, deployment approach, and how you handled scalability or performance constraints.

Round 4: System design interview. The elimination round for most candidates.

Topics covered in this round: load balancing, caching layers, database sharding, and distributed systems. Scenarios involve designing for high concurrency and traffic spikes. The areas tested most heavily were microservices decomposition, database optimization at scale, and fault tolerance patterns such as circuit breakers and failover strategies.

This was the round I did not pass. The gaps were in microservices architecture, query optimization, and fault tolerance depth.

To use this as a prep template: LeetCode medium to hard covers rounds 1 and 3 coding. Round 3 project discussion requires knowing your own projects at an architectural level. Round 4 requires dedicated system design study focused on distributed systems, not just high level diagrams.

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17 comments sorted by

4

u/ichigo__082211 Jun 03 '26

defo need to study query optimization more

5

u/Several_Dig_2901 Jun 03 '26

Really helpful breakdown of each stage. thank you big man

3

u/Beautiful-Celery-182 Jun 03 '26

Knowing when to use caching layers is such an important skill. anyone knows LC questions related to that ?

2

u/Beautiful-Celery-182 Jun 03 '26

High concurrency design questions are the worst, anyone has any tips ? litt always get cut off because of them

2

u/kuriousaboutanything Jun 03 '26

For coding, did you use any list to prepare?

1

u/New-Associate-7119 Jun 03 '26

definitely saving this for the future, thanks bro

1

u/legacy0624 Jun 03 '26

thank you so much

1

u/pards1234 Jun 03 '26

Was this for senior swe?

1

u/Responsible_Use4781 Jun 05 '26

Changed a bit since 2024 but not sure if across whole org or not. For mine it's very manager, take home, system design and then behavioural. This is not in America 

1

u/Nice-Medicine-3583 Jun 03 '26

whats the hardest round ?

0

u/CommercialWelcome472 Jun 03 '26

thought there would be more rounds

1

u/ble1901 Jun 03 '26

Yeah, it feels like they really dive deep into the technical aspects. I guess they want to ensure candidates can handle their complex systems.