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Updated weekly · Last refresh Oct 17

iCapital Data Engineer Interview Questions

The questions to prepare for a iCapital Data Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
SQL & Data ManipulationStart here. 3 questions + 2 drills · ~46 min
Top Customers by Region VolumeMedium
Practice

Find the top 3 customers in each region by transaction volume using joins, aggregation, and window ranking.

Window FunctionsJoinsRankingiCapital
SQL and API Data ManipulationHard

Evaluates your ability to integrate REST API data and execute complex SQL-based transformations.

Data ManipulationapisqliCapital
Optimizing a Slow SQL QueryMedium

Tests SQL performance troubleshooting skills and ability to improve query efficiency.

JoinsData WranglingAggregationsiCapital
SQL Data Retrieval StrategyMedium
Practice
Practice drill

Join iCapital-style portfolio data and aggregate settled quarterly cash flow by active portfolio.

JoinsData Manipulationsql queriesiCapital
Database Schema With ER ModelMedium
Practice
Practice drill

Design related e-commerce tables and verify the schema with a customer order summary.

data relationshipsdatabase designAggregationsiCapital
2
Pipelines18 questions · ~158 min
Visualizing Late and Out-of-Order StreamsHard

Approach for visualizing streaming data when events arrive late, out of order, or with uneven latency.

Stream ProcessingData WranglingIdempotencyiCapital
Warehouse Analytics ExperienceEasy

Discuss practical experience using a data warehouse for analytics, including loading, transformation, orchestration, and data quality.

InfrastructureData ModelingiCapital
Design Real-Time Sensor Event PipelineHard

Design a real-time pipeline for sensor events that transforms data and feeds a UI with low latency.

Stream ProcessingOrchestrationDependenciesiCapital
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3
Coding3 questions · ~26 min
Choosing Data Structures at ScaleEasy

Explain which data structures work best for large datasets based on access patterns, memory use, and update costs.

Hash TablesArraysHeapiCapital
Data Manipulation Coding ChallengeMedium

Tests hands-on ability to implement correct data transformations under time constraints.

Hash TablesArraysStringsiCapital
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The finish line: interview-readyComplete all 24 questions plus 2 hands-on drills to finish this plan.