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Updated weekly · Last refresh Aug 30

Optimizely Software Engineer Interview Questions

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

44questions
~6htotal time
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1
CodingStart here. 13 questions · ~108 min
Tree Traversal and Recursive SpaceMedium

Tests understanding of recursion, traversal strategies, and space complexity analysis.

Recursionspace complexityTreesOptimizely
Build CRUD REST API EndpointsMedium

Tests API design, HTTP method usage, and implementing CRUD behavior correctly.

rest apisBasic AlgorithmsFrameworksOptimizely
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2
Execution5 questions · ~42 min
Real-Time Analytics at ScaleHard

Tests system design for high-throughput event processing with reliability and observability.

design systemthroughputOptimizely
Database Choice and Schema DesignMedium

Tests data modeling tradeoffs and selecting appropriate storage for write-heavy workloads.

Trade-offsschema designdatabase designOptimizely
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3
SQL & Data Manipulation4 questions + 3 drills · ~63 min
DB and Backend Implementation ChoicesMedium

Evaluates your engineering judgment for backend architecture and data layer decisions.

Optimizely
Basic SQL and String ReverseEasy
Practice
Practice drill

Reverse Costar property search strings with PostgreSQL and flag rows whose stored expected value does not match.

sql queriesstring manipulationCostar
SQL: Character CountEasy
Practice
Practice drill

Count a target character case-insensitively in a Discord message using PostgreSQL string functions.

Data Analysissql queriesstring manipulationDiscord
SQL: Unique Words Between MessagesHard
Practice
Practice drill

Use PostgreSQL string splitting, CTEs, joins, and window functions to find words unique to two Discord messages.

Data Analysissql queriesstring manipulationDiscord
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4
Behavioral & Leadership18 questions · ~150 min
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5
More topics4 questions · ~33 min
What Is a CMS and .NET?Medium

Evaluates your foundational knowledge of web platforms and the .NET ecosystem.

Optimizely
Apache Hop Sorting PipelineMedium

Tests your ability to implement data processing pipelines and transformations.

data processingOptimizely
JavaScript Event LoopMedium

Tests understanding of JavaScript concurrency and the event loop model.

javascriptOptimizely
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The finish line: interview-readyComplete all 44 questions plus 3 hands-on drills to finish this plan.