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Spotify system design interview questions

2 questions on this site are reported in Spotify software engineer interviews. Each has a full reference design (requirements, back-of-envelope numbers, components, user flows and deep dives with interviewer follow-ups). Each one can be walked through turn by turn and then sat as a mock. Patterns covered: workflow-orchestration, dag-scheduling, backfills, idempotency, row-locking, prefetching, licensing, offline, counting, playlists.

Run an AI mock Spotify interview →One of these questions, run as a live round in that style, with a debrief at the end.

Attribution comes from public interview guides and candidate reports, not from Spotify. It indicates where a question has been asked, nothing more.

Spotify questions

What the Spotify round looks like

About an hour, drawn in Mural: design a system that does one thing, then follow-ups on scale. Reported prompts include adding images to playlists, podcast search and content delivery, and loops also have a separate case study round, often finding the fault in a running system.

What it is reported to weigh

  • Content delivery: CDNs, caching and load balancing for files served to listeners worldwide
  • Bottlenecks found and removed as the follow-ups raise the scale
  • Each decision explained, down to the components and technologies you would use

The common mistake

Stopping at the application services. Several reported prompts turn on serving files such as images or audio quickly around the world, and a candidate given a CDN prompt says basic networking was needed, so be ready to discuss caching, load balancing and where the bytes come from.

From public interview guides and candidate reports, and Spotify’s own interview guidance where it publishes any. Not endorsed by Spotify. Formats change; treat it as a prior, not a promise.

How to prepare for the Spotify system design interview

Large-company loops run 45 to 60 minutes, expect numbers, and spend most of the time on deep dives. Walk through a question to see how a strong candidate paces the hour, sit the same question as a mock until you can produce the requirements, the estimates and the design without looking, then read the interview framework guide for how to structure the hour. The other questions on the site teach patterns that show up in Spotify interviews under different names.

Questions people ask about the Spotify system design interview

What system design questions does Spotify ask?

Questions reported in Spotify system design interviews include Apache Airflow and Spotify. Between them they test workflow orchestration, dag scheduling, backfills, idempotency, row locking and prefetching. The reports come from public interview guides and candidate accounts, not from Spotify, so practise the patterns rather than memorising one list.

What is the Spotify system design interview like?

About an hour, drawn in Mural: design a system that does one thing, then follow-ups on scale. Reported prompts include adding images to playlists, podcast search and content delivery, and loops also have a separate case study round, often finding the fault in a running system.

What does Spotify look for in a system design interview?

Reports say the Spotify round weighs 3 things. 1. Content delivery: CDNs, caching and load balancing for files served to listeners worldwide. 2. Bottlenecks found and removed as the follow-ups raise the scale. 3. Each decision explained, down to the components and technologies you would use. Stopping at the application services. Several reported prompts turn on serving files such as images or audio quickly around the world, and a candidate given a CDN prompt says basic networking was needed, so be ready to discuss caching, load balancing and where the bytes come from.

How do I prepare for the Spotify system design interview?

Practise the questions reported there out loud, under a 45-minute clock: requirements with numbers first, then estimates, a high-level design, and deep dives into the two or three hardest parts. Start with Apache Airflow: watch a strong candidate answer it turn by turn, then sit it yourself. Then cover the patterns the round leans on (workflow orchestration, dag scheduling, backfills and idempotency) with one more question each.