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Dexcom Software Engineer Interview Questions

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

50questions
~7htotal time
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1
System DesignStart here. 9 questions · ~72 min
Designing for High-Frequency Wearable DataHard

Tests system design skills for ingesting, processing, and scaling high-rate wearable data.

system designdata handlingDexcom
Ensuring Data Integrity in Distributed SystemsHard

Tests your methods for maintaining correctness, ordering, and integrity across distributed components.

distributed systemsdata integrityvalidationDexcom
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2
Coding5 questions · ~40 min
Data Structures and Role CodingHard

Evaluates preparedness for technical coding questions and DSA fundamentals.

CodingDexcom
What Is a HeapEasy

Assesses your understanding of memory regions and allocation behavior.

Data StructuresHeapDexcom
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3
Behavioral & Leadership32 questions · ~256 min
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4
More topics4 questions · ~32 min
Prioritize Work Under Resource ConstraintsMedium

Prioritize competing engineering projects when headcount, deadlines, and stakeholder demand exceed available capacity.

Trade-offsScope ManagementPrioritizationDexcom
SQL and Database ConceptsMedium

Assesses your SQL and relational database fundamentals relevant to data-driven systems.

sqloopDexcom
SIP and How It’s UsedMedium

Evaluates your understanding of security or infrastructure concepts relevant to software systems.

NetworkingDexcom
Design Problem in One HourHard

Evaluates structured thinking, communication, and speed under time-boxed constraints.

presentationDexcom

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Queries for RankingMedium
Practice
Practice drill

Rank active HSBC employees by division and return every employee tied for the highest or second-highest salary.

javasqlHsbc
SQL Duplicate Record DetectionEasy
Practice
Practice drill

Find duplicate American Institutes for Research assessment submissions using a CTE, GROUP BY, HAVING, and joins.

deduplicationsqldata integrityAmerican Institutes for ResearchMacy's
SQL Average Selling PriceMedium
Practice
Practice drill

Calculate weighted average selling prices by product using a date-range join, aggregation, and NULL handling.

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