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Updated weekly · Last refresh Oct 17

Loft Software Engineer Interview Questions

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

45questions
~7htotal time
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1
CodingStart here. 8 questions · ~71 min
Shortest Path in Grid LotMedium
Practice

Use BFS on a grid to find the shortest path from start to destination while avoiding blocked cells.

QueueSearchingGraphsLoft
Two Sum for 42Medium

Tests your problem-solving skills for array algorithms and edge-case handling.

Array ManipulationLoft
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2
System Design9 questions · ~80 min
Real Estate Design SystemHard

Tests your ability to structure UI components and workflows for a product with CSV-driven data ingestion.

Loft
Cloud Architecture and Design PatternsHard

Tests your ability to design scalable cloud architecture and choose appropriate design patterns.

cloud architecturedesign patternsLoft
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3
Behavioral & Leadership22 questions · ~195 min
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4
More topics6 questions · ~53 min
Speed Up a SQL QueryMedium

Evaluates your ability to optimize SQL queries using indexing, query plans, and data modeling techniques.

Performance Tuningquery optimizationLoft
DDD for Real Estate Sale LifecycleMedium

Tests domain modeling skills and your ability to structure code around business concepts.

CommunicationOwnershiprequirementsLoft
Distributed Ledger With Eventual ConsistencyHard

Tests distributed systems design for financial workflows and consistency guarantees.

Dependenciesdata integrityData ModelingLoft
Zero-Downtime Microservices MigrationHard

Tests migration planning, risk management, and strategies for safe incremental rollout.

Rollback PlanTrade-offsRoadmappingLoft
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Rolling Average and RankingHard
Practice
Practice drill

Use CTEs and window functions to calculate 7-day transaction averages and rank Loft users within each region.

Window FunctionsRankingRunning TotalsLoftArcadisCgi Nederland
Refactoring a Slow QueryMedium
Practice
Practice drill

Refactor a slow Candid Health claims query using pre-aggregation, latest-event logic, and monthly payer metrics.

Performance Tuningdatabase optimizationCTEsCandid Health
Advanced Data Modeling for PerformanceHard
Practice
Practice drill

Calculate Citi business-unit performance variance against targets and identify the largest shortfalls.

business problemdata managementtechnical experienceCiti
The finish line: interview-readyComplete all 45 questions plus 3 hands-on drills to finish this plan.