Top 50
Prep plan
Updated weekly · Last refresh Aug 30

Alpaca Software Engineer Interview Questions

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

50questions
~9htotal time
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1
SQL & Data ManipulationStart here. 5 questions · ~52 min
Running Totals With CTEsMedium
Practice

Calculate daily net cash movement and running balances for Alpaca brokerage accounts using a CTE, subquery, and window function.

SubqueriesCTEsRunning TotalsAlpaca
Rank Users by Cohort ActivityHard
Practice

Rank Alpaca users within signup cohorts by Q1 activity using LEFT JOIN, aggregation, and RANK().

Window FunctionsRankingGroup ByAlpaca
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2
Coding16 questions · ~167 min
Longest Substring Without RepeatsMedium
Practice

Find the longest substring with all unique characters using a sliding window.

Hash TablesStringsTwo PointersAlpaca
Rotate Square Matrix In PlaceEasy
Practice

Rotate an n x n matrix 90 degrees clockwise in place using transpose and row reversal.

Array ManipulationMatrixAlpaca
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3
System Design13 questions · ~136 min
Design Feature Drift Monitoring SystemHard

Design a production ranking system with robust feature drift monitoring across batch and real-time features at high QPS.

Feature StoreFeature DriftModel ServingAlpaca
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4
Security & Infrastructure6 questions · ~63 min
Troubleshoot Linux CLI Failures in ProductionMedium

Diagnose Linux CLI failures in production by tracing process, permission, and OS-level issues with verifiable checks.

InfrastructureQualityAlpaca
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5
Pipelines4 questions · ~42 min
Data Quality in Batch PipelinesMedium

Tests reliability engineering for data pipelines, including validation and failure handling.

Batch ProcessingBackfillingQualityAlpaca
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6
Behavioral & Leadership4 questions · ~42 min
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7
More topics2 questions · ~21 min
Define Success Criteria for Feature LaunchEasy

Define launch success criteria for a new feature with clear KPIs, leading indicators, and stakeholder alignment.

Launch PlanningSuccess CriteriaRisk AssessmentAlpaca
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