Fuku Software Engineer Interview Questions

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

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CodingStart here. 5 questions · ~55 min

Detect Cycles in Directed GraphMedium

Practice

Use DFS with recursion-state tracking to detect whether a directed dependency graph contains a cycle.

dfscycle detectionGraphs

Fuku

Secure Token Bucket Rate LimiterHard

Practice

Implement a token bucket rate limiter that safely validates signed requests and enforces per-key limits in O(1) average time.

QueueMathGreedy

Fuku

Merge Overlapping Time IntervalsMedium

Practice

Merge overlapping intervals by sorting on start time, then scanning once to combine intersecting ranges.

time complexityAlgorithmsperformance analysis

Fuku

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Pipelines4 questions · ~44 min

Build Idempotent Payment API PipelineEasy

Design an idempotent payment API and ETL pipeline that prevents duplicate charges during retries while publishing exactly-once payment events downstream.

InfrastructureIdempotencyQuality

Fuku

At-Least-Once Distributed SchedulerHard

Tests distributed systems design and reliability tradeoffs for Fuku job processing.

OrchestrationIdempotencyDependencies

Fuku

Collaborative Document Editing SchemaMedium

Tests data modeling and API design for real-time collaborative editing systems.

APIsData ModelingQuality

Fuku

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Execution4 questions · ~44 min

Migrate Monolith to MicroservicesHard

Plan a zero-downtime migration from a legacy monolith to microservices while managing risk, sequencing, and stakeholder pressure.

Trade-offsRoadmappingRisk Assessment

Fuku

Rate Limiter for Public APIHard

Tests API protection design, fairness, and scalability under high request volume.

Trade-offsSuccess CriteriaRisk Assessment

Fuku

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Behavioral & Leadership5 questions · ~55 min

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