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Updated weekly · Last refresh Sep 22

Luxoft Backend Engineer Interview Questions

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

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1
CodingStart here. 4 questions · ~33 min
Design a User Data ModelHard

Tests backend modeling and implementation skills for data access and aggregation.

Luxoft
Code Review and ParallelismMedium

Evaluates collaboration practices and ability to reason about parallel programming.

Luxoft
General Java and CodingMedium

Assesses general backend coding ability and Java proficiency.

javaLuxoft
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2
System Design3 questions · ~25 min
URL Shortening at ScaleHard

Evaluates scalable backend design for high-throughput URL redirection workloads.

system designscalabilityarchitectureLuxoft
Caching for Backend PerformanceMedium

Tests caching strategy selection and integration for backend latency and throughput improvements.

performancecachingarchitectureLuxoft
Load Balancing in MicroservicesMedium

Assesses system design tradeoffs for distributing traffic across backend services.

load balancingarchitecturemicroservicesLuxoft
3
More topics2 questions · ~16 min
Python and SQL FocusMedium

Evaluates practical experience combining Python and SQL for backend development.

sqlpythonLuxoft
SQL and Data ConceptsMedium

Assesses understanding of core SQL data concepts and transactional guarantees.

Data StructuresLuxoft

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Second Highest Trader SalaryEasy
Practice
Practice drill

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingeClinicalWorksNNeenOpal CanadaInformatica
Second Highest Without AggregatesHard
Practice
Practice drill

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

SubqueriesRankingSelf-JoinsCredit GenieCisco Restaurant + BarDevoteam
SQL Joins and AggregationsMedium
Practice
Practice drill

Join policy and ISO ClaimSearch claim data to aggregate claim counts and incurred losses by state and policy type.

JoinsGroup ByAggregationsVerisk AnalyticsMarshBroadridge Financial Solutions
The finish line: interview-readyComplete all 9 questions plus 3 hands-on drills to finish this plan.