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American Express Global Business Travel Software Engineer Interview Questions

The questions to prepare for a American Express Global Business Travel Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

26questions
~4htotal time
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1
System DesignStart here. 4 questions · ~32 min
SaaS Architecture and ScalingHard

Evaluates system design depth and ability to identify scaling bottlenecks in SaaS architectures.

scalabilitysaaSarchitectureAmerican Express Global Business Travel
HLD vs LLD for a MicroserviceMedium

Assesses design process maturity and ability to separate concerns from architecture to implementation.

microservicesAmerican Express Global Business Travel
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2
Coding6 questions · ~48 min
Multi-Threading Across CPUsMedium

Assesses understanding of concurrency and practical multi-threading scenarios.

American Express Global Business Travel
Java Core and ConcurrencyMedium

Evaluates understanding of core Java fundamentals and concurrency concepts.

javaoopconcurrencyAmerican Express Global Business Travel
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3
Behavioral & Leadership12 questions · ~97 min
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4
More topics4 questions · ~32 min
Java Garbage Collection DebuggingMedium

Assesses Java runtime knowledge and practical debugging approach for memory issues at scale.

memory managementjavaAmerican Express Global Business Travel
Composite Key vs Unique KeyMedium

Tests relational database fundamentals and key constraint semantics.

American Express Global Business Travel
Workflow Performance Problem SolvingHard

Evaluates structured troubleshooting and performance optimization approach.

performanceworkflowAmerican Express Global Business Travel
ELK and CI/CD ObservabilityMedium

Evaluates practical knowledge of production engineering practices and monitoring.

DevOpsAmerican Express Global Business Travel

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Merge Client Revenue with Lookup DefaultsEasy
Practice
Practice drill

Merge client lists with historical revenue using lookup-style joins and null handling.

JoinsData WranglingAggregationsAmerican Express Global Business Travel
Monthly Spend by Region and CategoryEasy
Practice
Practice drill

Aggregate March 2024 Egencia booking spend by region and travel category using GROUP BY and TO_CHAR in PostgreSQL.

PivotData WranglingAggregationsAmerican Express Global Business Travel
Rank Clients by SpendEasy
Practice
Practice drill

Rank American Express GBT clients within each region using aggregation, a LEFT JOIN, and the RANK window function.

Window FunctionsRankingAggregationsAmerican Express Global Business Travel
The finish line: interview-readyComplete all 26 questions plus 3 hands-on drills to finish this plan.