Top 50
Prep plan
Updated weekly · Last refresh Oct 17

Justworks Software Engineer Interview Questions

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

50questions
~9htotal time
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1
CodingStart here. 17 questions · ~186 min
Refactor and Debug Poorly Written CodeMedium
Practice

Refactor a badly written function and fix its bugs while preserving the intended behavior.

code analysisclean codeedge casesJustworks
Build and Fix a Coding SegmentEasy
Practice

Build a stable unique list and correct the duplicate-checking logic in a broken implementation.

CodingArraysDebuggingJustworks
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2
System Design7 questions · ~77 min
Design a Large-Scale Payroll PlatformHard

Design ML for a payroll platform that flags anomalous payroll runs across thousands of companies.

Feature Storearchitecture patternsfailure modesJustworks
Design a Payroll SystemMedium

Evaluates system design fundamentals for a complex, real-world domain.

system designJustworks
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3
SQL & Data Manipulation3 questions + 2 drills · ~53 min
Process Data File With SQLMedium
Practice

Analyze loaded file records by category, including counts, amounts, averages, and validation percentages.

data processingJoinsAnalysisJustworks
Model Project Task RelationshipsMedium

Assesses data modeling and SQL querying for multi-entity relationships.

task managementJustworks
Unique Elements and Top-K FrequenciesMedium
Practice
Practice drill

Return the first row for each unique value, then rank the k most frequent values.

large datasetsData Structurescomplex queriesEverlaw
Anagram Check With SQLMedium
Practice
Practice drill

Compare normalized character signatures to determine whether each pair of strings is an anagram.

data cleaningJoinsstring manipulationAdobe
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4
Execution4 questions · ~44 min
Implement From Vague RequirementsMedium

Explain how you turned ambiguous requirements into an executable plan, aligned stakeholders, and delivered the project.

business requirementsClaritycross-functional executionJustworks
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5
Behavioral & Leadership18 questions · ~197 min
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6
More topics1 question · ~11 min
Security Architecture and Risk ManagementHard

Tests your ability to design security controls and manage risk in production systems.

security architectureRisk ManagementJustworks
The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.