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Updated weekly · Last refresh Oct 17

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 daily.

24questions
~4htotal time
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1
CodingStart here. 6 questions · ~61 min
Count Spaces in StringEasy
Practice

Count ASCII space characters in a string using a single linear scan.

Codingstring manipulationAlgorithmsAmerican Express Global Business Travel
Fibonacci Series ImplementationEasy
Practice

Generate the first n Fibonacci terms using an iterative constant-space approach.

RecursionAmerican Express Global Business Travel
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2
System Design4 questions · ~41 min
REST API DetailsMedium

Assesses understanding of REST principles, design, and typical API components.

designAmerican Express Global Business Travel
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3
Behavioral & Leadership8 questions · ~81 min
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4
More topics6 questions · ~61 min
ELK and CI/CD ObservabilityMedium

Evaluates practical knowledge of production engineering practices and monitoring.

DevOpsAmerican Express Global Business Travel
Workflow Performance Problem SolvingHard

Evaluates structured troubleshooting and performance optimization approach.

performanceworkflowAmerican Express Global Business Travel
Java Explained DeeplyMedium

Assesses depth of Java knowledge and ability to explain fundamentals clearly.

javaAmerican Express Global Business Travel
Composite Key vs Unique KeyMedium

Tests relational database fundamentals and key constraint semantics.

American Express Global Business Travel
Java Garbage Collection DebuggingMedium

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

memory managementjavaAmerican 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 24 questions plus 3 hands-on drills to finish this plan.