League Software Engineer Interview Questions

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

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CodingStart here. 15 questions · ~134 min

Use a hash map to find two array elements that sum to a target in O(n) time.

Linked List ReversalEasy

Practice

Reverse a singly linked list in-place using iterative pointer manipulation.

RecursionLinked ListsArrays

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REST vs GraphQLMedium

Tests API design knowledge and ability to reason about tradeoffs.

Hash TablesStrings

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Execution12 questions · ~107 min

Explain how you would optimize a system for performance, reliability, and user experience while making clear trade-offs and defining success.

Scalable and Maintainable Solution ExecutionEasy

Explain how you plan for scalability and maintainability up front, including trade-offs, success criteria, and risk management.

InfrastructureTrade-offsRisk Assessment

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Architecture Trade-offsHard

Tests ability to reason about trade-offs and justify architectural decisions.

Trade-offsSuccess CriteriaRisk Assessment

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Behavioral & Leadership22 questions · ~196 min

Managing an Underperforming Team MemberMedium

Tests people management under pressure: coaching an underperformer while protecting team morale, delivery, and accountability.

feedbackperformanceTeam Management

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