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Hopper Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 28 questions · ~256 min
Reverse String In PlaceEasy
Practice

Reverse a string using a two-pointer approach by converting it to a mutable character list in Python.

CodingStringsProgrammingHopper
Balanced Brackets CheckEasy
Practice

Use a stack to determine whether an IDT message string contains properly nested and matched brackets.

RecursionStackStringsHopper
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2
System Design7 questions · ~64 min
Scalable Distributed Web CrawlerHard

Tests system design for large-scale crawling, throughput control, deduplication, and storage.

deduplicationInfrastructureData ModelingHopper
Design Hopper Web CrawlerHard

Evaluates system design thinking for building a scalable crawler to support Hopper's data needs.

system architectureHopper
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3
Execution4 questions · ~37 min
Concurrent Seat Selection and PaymentHard

Tests concurrency control, transactional design, and reliability for high-stakes booking flows.

Trade-offsRisk AssessmentScope ManagementHopper
Explain Your Job ChangeEasy

Tests your ability to communicate professionally about career transitions and motivations.

Trade-offsRisk AssessmentScope ManagementHopper
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4
Behavioral & Leadership8 questions · ~73 min
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5
More topics3 questions · ~27 min
Fault-Tolerant Migration ArchitectureHard

Tests cloud architecture skills for migration, resilience, and fault tolerance under load.

InfrastructureAutomationQualityHopper
Implement DB Access PatternsMedium

Evaluates your practical understanding of data access patterns and database interactions.

database accessHopper
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Basic SQL and String ReverseEasy
Practice
Practice drill

Reverse Costar property search strings with PostgreSQL and flag rows whose stored expected value does not match.

sql queriesstring manipulationCostar
SQL: Character CountEasy
Practice
Practice drill

Count a target character case-insensitively in a Discord message using PostgreSQL string functions.

Data Analysissql queriesstring manipulationDiscord
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.