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Prep plan
Updated weekly · Last refresh Aug 30

StockX Software Engineer Interview Questions

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

36questions
~5htotal time
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1
System DesignStart here. 5 questions · ~41 min
Design a Real-Time Bid AgentHard
Recently asked

Design an agentic ad bidding system that makes real-time bid adjustments at very high scale with strict latency and reliability needs.

Feature StoreRetrievalModel ServingStockX
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2
Execution3 questions · ~25 min
Designing a REST APIMedium
Recently asked

Tests API design skills, resource modeling, and practical considerations for a production marketplace.

Trade-offsRoadmappingScope ManagementStockX
Diagnosing Web App PerformanceMedium
Recently asked

Tests performance troubleshooting methodology and ability to prioritize fixes using evidence.

Trade-offsSuccess CriteriaRisk AssessmentStockX
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3
Coding9 questions · ~74 min
Implementing a Caching MechanismMedium
Recently asked

Tests caching design decisions, performance trade-offs, and data consistency handling.

Hash TablesArraysHeapStockX
Ensuring Unique UsersMedium
Recently asked

Tests deduplication approach, data integrity, and practical handling of identity collisions.

Hash TablesArraysStringsStockX
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4
Behavioral & Leadership15 questions · ~123 min
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5
More topics4 questions · ~33 min
Scaling Transaction ProcessingHard
Recently asked

Tests system scaling strategy, throughput bottlenecks, and architecture decisions for marketplace traffic.

Stream ProcessingBatch ProcessingOrchestrationStockX
High Availability and Fault ToleranceMedium
Recently asked

Tests resilience engineering practices and ability to design for failures.

InfrastructureToolsQualityStockX
Marketplace Database SchemaMedium
Recently asked

Tests data modeling skills for marketplace entities, relationships, and query needs.

JoinsData WranglingAggregationsStockX
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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
Resolve Conflicting Customer AttributesMedium
Practice
Practice drill

Use joins, CTEs, and row ranking to resolve conflicting customer profile values across ACME House systems.

JoinsData WranglingQualityRamsey SolutionsACME House
Clean Inconsistent Expense EntriesHard
Practice
Practice drill

Clean inconsistent expense records with CTEs, joins, CASE logic, and aggregation to summarize valid spend by department.

Data WranglingAggregationsQualityUniversity of Colorado Denver
The finish line: interview-readyComplete all 36 questions plus 3 hands-on drills to finish this plan.