QXO Software Engineer Interview Questions

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

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CodingStart here. 6 questions · ~57 min

Validate whether unit and integration test definitions satisfy isolation, dependency, assertion, and uniqueness rules.

Optimizing a Legacy Code PathEasy

Practice

Replace an O(n²) legacy duplicate-filtering path with an order-preserving O(n) hash-set solution.

deduplicationArraysperformance

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Maintainable and Scalable CodeMedium

Practice

Implement a modular top-k frequency algorithm that scales with input size and preserves deterministic tie ordering.

clean codecode qualityDynamic Programming

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System Design11 questions · ~104 min

Design a resilient integration for a third-party ML API within an existing production stack.

Microservices for Supply Chain PlatformHard

Design a reliable supply chain microservices platform, including service boundaries, data flows, ML integration, observability, and failure handling.

distributed systemsdelivery logisticsarchitecture

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Database Architecture Trade-OffsHard

Explain how to choose database architectures for high-volume ML data, serving, and feedback workloads.

high-frequency requestsTrade-offsdatabase access

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Behavioral & Leadership19 questions · ~179 min

Leading an Ambiguous Technical ProjectMedium

Tests leading through technical ambiguity by creating clarity, prioritizing decisions, and driving aligned execution under uncertainty.

technical ambiguityLeadershipProject Management

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