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Prep plan
~2h total · Updated weekly · Last refresh Aug 9

Locus Backend Engineer Interview Questions

The questions to prepare for a Locus Backend Engineer interview. Questions from real interview reports rank first. Updated weekly.

Distributed Data ConsistencyHard

Tests your approach to consistency, reliability, and failure handling in distributed systems.

distributed systemsdata consistency
LLocus
Data Structure Trade-offs
Medium

Assesses your ability to justify data structure decisions based on complexity and constraints.

Trade-offsData Structurestechnical discussion
LLocus
Scale to 100x Input
Hard

Tests your scalability analysis and ability to redesign for major growth in workload.

system designperformancescalability
LLocus
Database Schema Trade-offs
Medium

Assesses your ability to reason about schema design choices and their impact on performance and correctness.

Trade-offstechnical discussion
LLocus
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RBAC System ImplementationMedium

Evaluates your backend security design and implementation approach for RBAC.

system designauthenticationSecurity
LLocus
Refactor for Performance
Medium

Assesses your ability to identify bottlenecks and improve backend performance safely.

refactoringcode qualityperformance
LLocus
Third-Party API Data Pipeline
Medium

Evaluates your integration skills, reliability practices, and data processing design.

data processingapiintegration
LLocus
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Handling Error States
Medium

Tests your debugging mindset and your ability to design robust error handling in backend code.

error handlingCommunicationtechnical experience
LLocus
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