Top 50
Prep plan
Updated weekly · Last refresh Oct 17

Discord Software Engineer Interview Questions

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

50questions
~10htotal time
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1
CodingStart here. 27 questions · ~326 min
Bad Word FilteringMedium
Practice

Use a trie and character normalization to replace banned words, including spellings that substitute 0 for o and 3 for e.

CodingData StructuresAlgorithmsDiscord
Stream to API ChunkingMedium
Practice

Parse padded network records and pack complete frames into API-sized chunks without splitting a record.

ArraysapicppDiscord
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2
System Design10 questions · ~121 min
Leader Election with EtcdHard

Design a backend service with one active leader and etcd-backed failover when the leader becomes unavailable.

distributed systemsarchitecture patternsfailure modesDiscord
Design a DatabaseHard

Design a database for ML workloads, balancing consistency, scalability, latency, cost, and operational resilience.

latencydatabase accessdistributed systemsDiscord
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3
Behavioral & Leadership8 questions · ~97 min
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4
More topics5 questions · ~60 min
Generate Sessions from EventsMedium

Tests your ability to design and implement streaming transformations for session generation.

Discord
Parse and Aggregate Chat MetricsMedium

Evaluates SQL skills for sessionization and aggregation across chat events.

Discord
Production Scaling for MillionsHard

Evaluates your system design tradeoffs for reliability, performance, and operational readiness at massive scale.

scalingproductionDiscord
JSON Parsing and AggregationMedium

Tests data manipulation skills and correctness in parsing and aggregation.

json parsingstatisticsDiscord
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.