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Scale Ai Software Engineer Interview Questions

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

Disagreeing on Technical Debt Priorities
Medium

Tests conflict resolution and influence when balancing technical debt against product delivery with cross-functional stakeholders.

Conflict ResolutionStakeholder Managementtechnical debt
SScale Ai
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Validate Nested JSON ConfigurationsMedium

Parse nested JSON model configs and validate required fields, types, and recursive child dependencies.

json parsingStringsvalidation
SScale Ai
LFU-LRU Dataset Cache
Hard

Implement an O(1) cache that evicts by lowest frequency, breaking ties by least recent use.

Hash TablescachingHeap
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Merge Overlapping Annotation Intervals
Medium

Tests algorithmic efficiency and correctness for interval merging under streaming inputs.

intervalsArraysSorting
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Design Inference API Rate LimitingHard

Design a rate-limiter for a multi-tenant AI inference API that protects capacity, preserves fairness, and supports different customer tiers.

Trade-offsdesign systemrate limiting
SScale Ai
Class Structure for RLHF Queue
Hard

Tests object-oriented design skills for maintainable RLHF evaluation pipelines and queue orchestration.

design systemQueue
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Design High-Throughput Labeling API
Hard

Tests system design for latency, throughput, reliability, and API design in a labeling workflow.

design systemTechnical Fluency
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Optimize Complex SQL Joins
Hard

Tests SQL performance tuning and reasoning about joins, indexes, and query plans for large datasets.

Joinsquery optimizationsql
SScale Ai