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Updated weekly · Last refresh Oct 17

Fanduel Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 11 questions · ~105 min
Detect Duplicates in Player ListEasy
Practice

Find repeated FanDuel player IDs in one pass using a hash set while preserving first-duplicate order.

Fanduel
Merge Overlapping IntervalsMedium
Practice

Sort intervals by start time, then merge overlapping ranges into a minimal non-overlapping list.

ArraysSearchingSortingFanduel
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2
Execution8 questions · ~76 min
Prioritize Work Under Tight DeadlinesEasy

Explain how you prioritize competing work under time pressure while making trade-offs and keeping stakeholders aligned.

Trade-offsRoadmappingScope ManagementFanduel
Broken Build in ProductionMedium

Assesses your operational judgment and incident handling for release failures.

production issuesFanduel
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3
System Design11 questions · ~105 min
Netflix-Style System DesignHard

Evaluates your system design approach for building scalable streaming-like capabilities.

system designFanduel
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4
Behavioral & Leadership16 questions · ~153 min
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5
More topics4 questions · ~38 min
Detect Duplicates in DatabaseMedium
Practice

Use a normalization CTE and self-join to find FanDuel player records sharing an email or phone number.

databaseFanduel
What You Did After a Live IncidentMedium

Tests your incident response, communication, and follow-up improvements.

Fanduel
Experience With K8s and TerraformMedium

Assesses your practical exposure to infrastructure automation and deployment tooling.

kubernetesOrchestrationFanduel
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
Optimizing Poorly Performing SQLHard
Practice
Practice drill

Optimize a PostgreSQL reporting query by reducing scanned rows, preserving unmatched records, and selecting the latest related review efficiently.

database optimizationlarge datasetsperformancePPriority Technology Holdings, LLCZillowOne
SQL for Bet Customer SegmentsMedium
Practice
Practice drill

Calculate settled bet win rates and find FanDuel customers winning at least 60% of three or more bets.

sqlFanduelUnion Bank
The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.