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Updated weekly · Last refresh Sep 27

Lendbuzz Backend Engineer Interview Questions

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

17questions
~3htotal time
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1
CodingStart here. 3 questions · ~30 min
Active Monthly Subscription PricingMedium
Practice

Find a subscription's active monthly price at a target month by processing unsorted plan-change events.

pricingfunctionsLendbuzz
Backend Coding: Reverse and SearchMedium

Tests your coding fundamentals and practical debugging workflow using Linux tools.

binary searchstring manipulationLendbuzz
String Alternation MergeEasy
Practice

Merge two strings by alternating characters, appending any remaining suffix when their lengths differ.

coding challengeStringsArray ManipulationLendbuzz
2
SQL & Data Manipulation4 questions + 3 drills · ~70 min
Optimizing Slow-Running QueriesMedium

Tests your ability to diagnose and improve SQL performance in production systems.

performancequery optimizationLendbuzz
Indexing Trade-Offs in High-Load SystemsMedium

Assesses how you choose indexes based on workload, write cost, and query patterns.

indexingperformanceLendbuzz
SQL Revenue by Subscription TierMedium
Practice
Practice drill

Given a schema with users, subscriptions, and payments, write a SQL query using joins and group by to find the total revenue generated per subscription tie...

Date FunctionsJoinsGroup ByLendbuzz
Second Highest Without AggregatesHard
Practice
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
Rolling 30-Day Transaction AverageMedium
Practice
Practice drill

Calculate each Scotiabank customer's rolling 30-day transaction average using PostgreSQL window functions and date-based frames.

Window FunctionsData ManipulationsqlSScotiabankAscendionLendbuzz
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3
System Design4 questions · ~40 min
Loan Application Service ArchitectureHard

Tests your ability to design scalable backend services for an AI-based lending workflow.

architectureLendbuzz
Ensuring Consistency Across ServicesHard

Evaluates your understanding of distributed consistency patterns and failure handling.

distributed systemsdata consistencyLendbuzz
Monolith vs Microservices Trade-OffsMedium

Assesses your ability to reason about operational complexity, scaling, and delivery speed.

architecturemicroservicesLendbuzz
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4
Behavioral & Leadership6 questions · ~60 min
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The finish line: interview-readyComplete all 17 questions plus 3 hands-on drills to finish this plan.