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Updated weekly · Last refresh Oct 17

Sanofi Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 5 questions · ~45 min
Parse and Transform Structured DataMedium
Practice

Parse nested clinical observations, deduplicate versions, and return records sorted by patient and collection time.

data parsingpythonSanofi
Analyze Algorithm Time and SpaceEasy

Explain how to analyze an algorithm’s time and space complexity and justify the final Big O bounds.

MathArraysGreedySanofi
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2
Execution8 questions · ~71 min
Resolving a High-Stakes Technical BlockerEasy

Describe a difficult technical issue, how you managed execution around it, and how you drove it to resolution.

Trade-offsSuccess CriteriaRisk AssessmentSanofi
Balance Debt and Feature DeliveryMedium

Explain how you prioritize technical debt versus feature work while aligning stakeholders and protecting delivery speed.

Trade-offsScope ManagementPrioritizationSanofi
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3
SQL & Data Manipulation3 questions + 1 drill · ~37 min
SQL Queries and Leetcode PracticeMedium
Practice

Write SQL to solve a standard interview-style data manipulation problem on a small relational dataset.

leetcodecomplex queriessqlSanofi
SQL Left Join BasicsEasy
Practice
Practice drill

Use a left join to return every customer, including customers without matching orders.

Joinssqlnull valuesSanofi
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4
System Design11 questions · ~98 min
Generic System Design QuestionsHard

Design a scalable ML system, including retrieval, ranking, serving, evaluation, and monitoring.

system designdistributed systemsModel ServingSanofi
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5
Behavioral & Leadership20 questions · ~178 min
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6
More topics3 questions · ~27 min
Troubleshooting Ongoing Batch ProcessHard

Diagnose and fix an ongoing batch ETL job that is missing SLA, producing partial loads, and failing intermittently.

Data QualityBatch ProcessingTroubleshootingSanofi
AWS ExperienceMedium

Assesses your hands-on experience with AWS services and infrastructure.

awsSanofi
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The finish line: interview-readyComplete all 50 questions plus 1 hands-on drill to finish this plan.