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Regeneron Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 14 questions · ~123 min
Longest Substring ProblemMedium
Practice

Find the length of the longest substring without repeated characters using a sliding window and hash map.

Hash TablesdeduplicationArraysRegeneron
Reverse a String in PythonEasy
Practice

Reverse a string in Python using character traversal and return the reversed result.

StringsfunctionspythonRegeneron
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2
Execution8 questions · ~70 min
Balance Speed, Quality, and ScopeMedium

Describe how you handled a tough trade-off between shipping fast, maintaining quality, and reducing scope.

Trade-offsRisk AssessmentScope ManagementRegeneron
Prior ExperienceEasy

Explain your prior experience delivering products, coordinating stakeholders, and managing execution trade-offs.

Stakeholder ManagementExecutionRoadmappingRegeneron
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3
System Design3 questions · ~26 min
Deploy Across PlatformsMedium

Evaluates your deployment strategy, testing approach, and cross-platform compatibility thinking.

cross-platformRegeneron
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4
Pipelines3 questions · ~26 min
Ensure Data Integrity in PipelinesMedium

Tests your ability to run reliable data pipelines with strong integrity controls.

data integrityRegeneron
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5
Behavioral & Leadership19 questions · ~166 min
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6
More topics3 questions · ~26 min
Version Control and CollaborationEasy

Evaluates your collaboration practices and how you manage code changes with teammates.

Stakeholder ManagementCommunicationOwnershipRegeneron
Use SAS and CDISC StandardsMedium

Evaluates your practical experience applying SAS and CDISC standards to regulated, data-heavy work.

Regeneron
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Handling Missing DataMedium
Practice
Practice drill

Standardize missing observation fields with fallback values, missingness flags, and ordered output.

Window Functionsmissing valuesdata cleaningEversource EnergyCincinnati Children's HospitalAdtalem Global Education
SQL Window Functions for Rolling MetricsHard
Practice
Practice drill

Calculate each user's 7-day activity average and rank users within their cohort using PostgreSQL window functions.

Window FunctionsDate FunctionsData ManipulationTredenceEchostarEliassen Group
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
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.