First Orion Software Engineer Interview Questions

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

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CodingStart here. 8 questions · ~85 min

Two Sum with TargetEasy

Practice

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

Hash TablesArraysStrings

First Orion

Compute Binary Tree HeightEasy

Practice

Use recursion on left and right subtrees to compute the height of a binary tree.

RecursionDynamic ProgrammingTrees

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Reverse a String in PythonEasy

Practice

Reverse a string in Python using character traversal and return the reversed result.

Stringsfunctionspython

First Orion

Synchronous vs Asynchronous ProgrammingMedium

Explain the differences between synchronous and asynchronous programming paradigms.

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Execution4 questions · ~42 min

Design an API Under ConstraintsMedium

Design an API by balancing usability, performance, versioning, and operational risk under real product constraints.

Trade-offsRisk AssessmentScope Management

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Ensure Distributed Data ConsistencyHard

Define an execution approach for maintaining data consistency across distributed systems while balancing delivery speed, risk, and operational resilience.

InfrastructureTrade-offsRisk Assessment

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Choose Monolith or MicroservicesMedium

Evaluate the execution trade-offs between monoliths and microservices and explain how you would choose the right approach.

Trade-offsRisk AssessmentScope Management

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Behavioral & Leadership10 questions · ~106 min

Driving Code Quality Through OwnershipEasy

Tests how a candidate raises engineering quality through ownership, prioritization, and team leadership with measurable results.

CommunicationLeadershipOwnership

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