Top 50
Prep plan
Updated weekly · Last refresh Aug 30

Confluent Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 13 questions · ~128 min
Longest Substring Without RepeatsMedium
Practice

Find the longest substring with all unique characters using a sliding window.

Hash TablesStringsTwo PointersConfluent
Merge Two Sorted Linked ListsEasy
Practice

Merge two sorted singly linked lists into one sorted list by relinking existing nodes.

RecursionLinked ListsSortingConfluent
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2
SQL & Data Manipulation5 questions + 2 drills · ~69 min
3
Pipelines6 questions · ~59 min
Kafka Message RetentionMedium

Tests understanding of Kafka fundamentals that underpin Confluent's data streaming platform.

InfrastructureData ModelingPipelinesConfluent
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4
Security & Infrastructure4 questions · ~39 min
REST vs gRPCMedium

Tests knowledge of API protocols and tradeoffs relevant to building Confluent services.

NetworkingtechnicalConfluent
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5
System Design12 questions · ~118 min
Distributed Database ArchitectureHard

Tests distributed systems design judgment including consistency, partitioning, and scalability.

system designdistributed systemsarchitectureConfluent
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6
Execution7 questions · ~69 min
CSS Box ModelEasy

Tests foundational front-end knowledge of how browsers compute element sizing and layout.

Trade-offsScope ManagementConfluent
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7
More topics3 questions · ~30 min
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.