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Updated weekly · Last refresh Oct 16

American Express Software Engineer Interview Questions

The questions to prepare for a American Express Software Engineer interview. Questions from real interview reports rank first. Updated daily.

50questions
~11htotal time
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1
CodingStart here. 17 questions · ~234 min
Maximum Cities Visitable from City 0Medium
Practice

Use tree knapsack dynamic programming to maximize connected cities visited within a budget.

Dynamic ProgrammingdfsAlgorithmsAmerican Express
Follow Source-Destination PairsEasy
Practice

Follow source-destination mappings with a hash map to find the final reachable destination.

ArraysData StructuresAlgorithmsAmerican Express
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2
System Design15 questions · ~207 min
Logout All React TabsHard

Design cross-tab logout synchronization in React so every Facebook tab immediately invalidates the session.

client-sidedistributed systemsAmerican Express
Handle 10k API RequestsHard

Design an ML inference service that remains reliable and responsive when 10K requests arrive at the API.

high-frequency requestsml inferenceapi gatewayAmerican Express
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3
Technical Fundamentals8 questions · ~110 min
React, JavaScript, JSON, and GitEasy
Recently asked

Distinguish React, JavaScript, JSON, and Git by their roles in web application development.

ui frameworkstechnical fundamentalstechnical knowledgeAmerican Express
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4
Execution3 questions · ~41 min
Lead Engineer Legacy Code PlanHard
Recently asked

Tests leadership and technical strategy for modernizing a risky legacy codebase.

code qualityteam leadershipProject ManagementAmerican Express
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5
Behavioral & Leadership4 questions · ~55 min
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6
More topics3 questions · ~41 min
Understanding ACID Properties in DatabasesMedium
Recently asked

Explain the ACID properties of database transactions and their importance.

American Express
Go API Security and AuthHard
Recently asked

Evaluates API security and authentication approach for production services.

Testingapi securityAmerican Express
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Join Basics and CardinalityEasy
Practice
Recently asked
Practice drill

Demonstrate a many-to-one relationship and compare LEFT JOIN and INNER JOIN results using Amex cardmember transactions.

null handlingJoinsmany-to-oneAmerican Express
Writing Business-Flavored SQLMedium
Practice
Practice drill

Summarize qualifying American Express merchant transaction activity, approval rates, and approved amounts for a monthly operations review.

Joinsfinancial dataData AnalysisAmerican Express
SQL and Case Study ScreeningMedium
Practice
Recently asked
Practice drill

Show SQL fundamentals by solving a basic card case with joins, aggregation, and conditional logic.

Joinscase studyCase WhenAmerican Express
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.