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Updated weekly · Last refresh Oct 17

Zillow Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 21 questions · ~199 min
Sliding Window: No RepeatsMedium
Practice

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

coding challengeSliding WindowData StructuresZillow
Arabic to Roman NumeralsMedium
Practice

Convert an integer from 1 to 3999 into its canonical Roman numeral using greedy subtractive values.

coding challengeArray ManipulationAlgorithmsZillow
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2
System Design6 questions · ~57 min
Search Engine ER DiagramMedium

Assesses database modeling ability using entity-relationship diagrams.

database designZillow
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3
Security & Infrastructure4 questions · ~38 min
How ARP WorksMedium

Assesses understanding of address resolution and network fundamentals.

arpNetworkingZillow
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4
Software Architecture4 questions · ~38 min
Legacy Code Refactor StrategyHard

Tests your ability to assess legacy systems, prioritize fixes, and plan safe refactors.

code qualitytechnical depthperformance analysisZillow
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5
Behavioral & Leadership9 questions · ~85 min
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6
More topics6 questions · ~57 min
Extract Update Delete From JSONMedium

Assesses data pipeline and CRUD workflow design for JSON-based payloads.

data extractionZillow
Filter Results From StringsMedium

Evaluates ability to parse and filter structured text data using SQL-style thinking.

data processingfilteringZillow
Rate Limiting for Zillow APIsHard

Tests your ability to protect public APIs with minimal impact on legitimate traffic.

Trade-offsCloud Security RisksperformanceZillow
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 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
Top Listings by Zip CodeMedium
Practice
Practice drill

Rank Zillow listings by price within each ZIP code and return the three most expensive listings per ZIP.

Window FunctionsData ManipulationRankingZillow
SQL and Preprocessing PracticeMedium
Practice
Practice drill

Create a reliable Zillow listings dataset by cleaning records and selecting each listing's latest valid status.

missing valuesdata preprocessingdata preparationZillow
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.