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Patreon Software Engineer Interview Questions

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

50questions
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1
CodingStart here. 27 questions · ~246 min
Flatten Nested DictionariesEasy
Practice
Recently asked

Flatten nested Patreon metadata into dot-separated keys using iterative depth-first traversal.

RecursionHash Tablesjson parsingPatreon
Design an Expiring LRU CacheHard
Practice
Recently asked

Implement an LRU cache with TTL support using a hash map, doubly linked list, and lazy expiration.

Hash TablesQueueLinked ListsPatreon
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2
System Design8 questions · ~73 min
Schema for Patreon Credit CardHard
Recently asked

Tests your ability to model domain data and design APIs for a payments-adjacent product.

Feature StoreRecommendation SystemsData ModelingPatreon
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3
Execution3 questions · ~27 min
Design a Creator Credit CardHard
Recently asked

Tests your end-to-end product thinking for a creator-focused payments feature and your trade-off judgment.

Trade-offsRoadmappingrequirementsPatreon
Optimize Queries and CachingMedium
Recently asked

Tests your performance engineering skills for databases and caching in a high-traffic transactional system.

Trade-offsperformancecachingPatreon
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4
Behavioral & Leadership8 questions · ~73 min
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5
More topics4 questions · ~36 min
SQL for Course Enrollment MetricsMedium
Practice

Use LEFT JOINs and aggregation to summarize published Patreon education courses by active professor and department.

JoinssqlPatreon
Distributed Ledger for BalancesHard
Recently asked

Tests your system design skills for financial correctness, consistency, and complex flows.

transactionsdata integrityData ModelingPatreon
SQL for Creator Performance MetricsMedium
Recently asked

Tests SQL proficiency with joins, aggregation, and producing business-ready metrics.

Date FunctionsJoinsAggregationsPatreon
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
Conversion Rate by Channel SegmentMedium
Practice
Practice drill

Use joins, a CTE, and aggregation to compute 30-day conversion rate by acquisition channel and customer segment.

JoinsGroup ByCase WhenMotiveHelloFreshBartech Staffing
SQL Average Selling PriceMedium
Practice
Practice drill

Calculate weighted average selling prices by product using a date-range join, aggregation, and NULL handling.

leetcodesqlCostarCostar Group
The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.