Affirm Site Reliability Engineer Interview Questions

The questions to prepare for a Affirm Site Reliability Engineer interview. Questions from real interview reports rank first. Updated daily.

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CodingStart here. 7 questions · ~62 min

Count error codes from an Affirm log stream and return the top 10 using a hash map and bounded heap.

Explain Solution Time ComplexityEasy

Explain how to analyze an algorithm’s time and space complexity and justify the result from the code structure.

Hash TablesSearchingSorting

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Implement Rate Limiting AlgorithmMedium

Tests ability to design and implement scalable request throttling under load.

apirate limiting

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Execution5 questions · ~45 min

Assesses system design skills for experimentation, data integrity, and reliable rollout.

Capacity Planning for 2x GrowthHard

Tests ability to forecast demand and plan capacity for reliability and cost efficiency.

scalabilitycapacity planning

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System Design4 questions · ~36 min

Monitoring and Alerting for MicroservicesMedium

Evaluates monitoring design choices, signal quality, and alerting strategy for microservices.

monitoringalertingmicroservices

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High-Availability Notification SpikesHard

Assesses system design for reliability, scaling, and resilience during traffic surges.

system designscalabilityhigh availability

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Behavioral & Leadership10 questions · ~89 min

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