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Updated weekly · Last refresh Oct 17

LendingClub Solutions Architect Interview Questions

The questions to prepare for a LendingClub Solutions Architect interview. Questions from real interview reports rank first. Updated daily.

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1
CodingStart here. 7 questions · ~73 min
Shortest Path in a GraphMedium
Practice

Find the minimum-cost path between two nodes in a weighted graph using Dijkstra's algorithm.

QueueSearchingGraphsLendingClub
Synchronous vs Asynchronous ProgrammingMedium

Explain the differences between synchronous and asynchronous programming paradigms.

LendingClub
Handling Hard Java ChallengesHard

Evaluates your problem-solving process and ability to debug complex Java issues.

javaProgrammingLendingClub
Caching Strategy for Large ScaleHard

Tests your caching design choices, invalidation strategy, and performance impact analysis.

Hash TablesGreedyHeapLendingClub
Choosing a Data StructureEasy

Tests your data modeling and algorithmic thinking for real system needs.

Hash TablesArraysTreesLendingClub
Sorting Large Data SetsMedium

Tests your algorithm knowledge and ability to reason about performance constraints at scale.

SortingGreedyHeapLendingClub
Microservices Architecture ComponentsEasy

Tests your ability to describe microservices building blocks and how they work together.

ArraysData WranglingGraphsLendingClub
2
More topics1 question · ~10 min
Optimizing a Slow Database QueryHard

Tests your SQL tuning skills, indexing strategy, and ability to diagnose bottlenecks.

JoinsData WranglingAggregationsLendingClub

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Optimize a Slow SQL QueryHard
Practice
Practice drill

Rewrite a slow PostgreSQL loan payment query to reduce scanned rows while preserving the required aggregated results.

database optimizationJoinsData WranglingAmeripriseEEltro Cyberchrome PrivateEnergyHub
SQL and Data Tooling ProficiencyMedium
Practice
Practice drill

Aggregate project usage to identify frequently used data analysis tools and compare their hours and ratings.

analytics toolsToolsJoinsLimeadeLaSalle NetworkE15 Group
Handling Missing DataMedium
Practice
Practice drill

Standardize missing observation fields with fallback values, missingness flags, and ordered output.

Window Functionsmissing valuesdata cleaningEversource EnergyCincinnati Children's HospitalAdtalem Global Education
The finish line: interview-readyComplete all 8 questions plus 3 hands-on drills to finish this plan.