American Express Solutions Architect Interview Questions

The questions to prepare for a American Express Solutions Architect interview. Questions from real interview reports rank first. Updated weekly.

Model Identity Access as Graph

Medium

Explain how to model authentication, authorization, OAuth, SAML, and RBAC as graph and tree structures for secure access decisions.

Hash TablesArraysGraphs

American Express

Secure Public API Design

Medium

Explain layered API security using token validation, request integrity, rate limiting, and replay protection.

Hash TablesArraysGraphs

American Express

Justify Path Cost Trade-offs

Medium

Explain how to justify trade-offs among graph-based routing options using cost, latency, and implementation complexity.

Hash TablesArraysGraphs

American Express

Shortest Path in Review Graph

Medium

Use BFS with a queue on an undirected graph to find the shortest path length between two nodes.

Hash TablesQueueGraphs

American Express

API Input Validation and Sanitization

Medium

Explain how to prevent common API vulnerabilities using input validation, output encoding, and safe lookup patterns.

Hash TablesArraysGraphs

American Express

Caching and Queueing at Scale

Medium

Explain how caching and queues improve throughput, and discuss ordering, retries, backpressure, and failure handling.

Hash TablesQueueHeap

American Express

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