Top 17
Prep plan
Updated weekly · Last refresh Sep 25
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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 daily.

17questions
~3htotal time
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1
CodingStart here. 4 questions · ~40 min
Validate Nested JSON ConfigurationsMedium
Practice

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

json parsingStringsvalidationSScale Ai
LFU-LRU Dataset CacheHard
Practice

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

Hash TablescachingHeapSScale Ai
Detect Scheduling DeadzonesHard

Tests modeling and algorithm design for detecting gaps and invalid scheduling windows.

abstractionstate managementoopSScale Ai
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2
Execution3 questions · ~30 min
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 limitingSScale Ai
Class Structure for RLHF QueueHard

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

design systemQueueSScale Ai
Design High-Throughput Labeling APIHard

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

design systemTechnical FluencySScale Ai

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3
Behavioral & Leadership9 questions · ~91 min
Reflecting on Tooling ChoicesMedium

Tests ownership and self-awareness through a concrete project retrospective on tooling choices, obstacles, and what the candidate would improve.

self assessmentprojectstechnical experienceSScale Ai
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4
More topics1 question · ~10 min
Optimize Complex SQL JoinsHard

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

Joinsquery optimizationsqlSScale Ai
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 17 questions plus 3 hands-on drills to finish this plan.