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Updated weekly · Last refresh Aug 30

Sephora Software Engineer Interview Questions

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

18questions
~3htotal time
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1
CodingStart here. 4 questions · ~34 min
Abstract Classes vs InterfacesEasy

Compare Java abstract classes and interfaces, including inheritance rules, shared behavior, and when each is the better design choice.

javaabstractionoopSephora
Difference Between Interface and Abstract Class in JavaMedium

Explain the differences between interfaces and abstract classes in Java and when to use each.

Hash TablesArraysStringsSephora
How Java Garbage Collection WorksMedium

Explain Java GC roots, reachability, generations, and how collection reclaims unused heap memory.

ArraysStringsSephora
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2
Pipelines3 questions · ~25 min
Consistency Across Service PipelinesMedium

Approach for keeping pipeline outputs consistent when multiple microservices publish overlapping, delayed, or duplicate data.

system designdata consistencymicroservicesSephora
High-Concurrency Secure REST APIHard

Tests your API design, security practices, and concurrency handling for a high-traffic retail platform.

InfrastructureAPIsSecuritySephora
Back-in-Stock Notification SystemMedium

Tests your ability to design dependable event-driven notifications with correctness and reliability.

AutomationDependenciesQualitySephora

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3
Behavioral & Leadership9 questions · ~76 min
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4
More topics2 questions · ~17 min
Optimizing Slow Production QueriesMedium

Tests your ability to diagnose and improve database performance under real production constraints.

performancequery optimizationdata integritySephora
Distributed Caching for CatalogHard

Tests your system design skills for caching, scalability, and performance during peak traffic.

Launch PlanningTrade-offsscalabilitySephora
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Queries for RankingMedium
Practice
Practice drill

Rank active HSBC employees by division and return every employee tied for the highest or second-highest salary.

javasqlHsbc
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
Top Users by Recent Transaction VolumeMedium
Practice
Practice drill

Find the top 3 users by completed transaction volume in the last 30 days using joins and aggregation.

Data Analysisquery optimizationsqlTTier 1 BankRevolutChime
The finish line: interview-readyComplete all 18 questions plus 3 hands-on drills to finish this plan.