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Updated weekly · Last refresh Aug 30

Justworks Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 17 questions · ~142 min
Merge Overlapping IntervalsMedium
Practice
Recently asked

Sort intervals by start time, then merge overlapping ranges into a minimal non-overlapping list.

ArraysSearchingSortingJustworks
Efficient Array or String ManipulationEasy
Recently asked

Tests coding speed, algorithm choice, and correctness under time constraints.

ArraysStringsperformance analysisJustworks
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2
Execution4 questions · ~33 min
Collaborative Board Schema and APIHard
Recently asked

Tests data modeling, API design, and handling of state transitions in a collaborative system.

api designsolution designData ModelingJustworks
Backend for Consistency, Caching, AuthHard
Recently asked

Tests system design trade-offs across consistency, caching strategy, and secure authentication.

cachingsolution designdata integrityJustworks
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3
SQL & Data Manipulation3 questions + 3 drills · ~55 min
Process Data File With SQLMedium

Evaluates ability to manipulate data and produce analytical outputs from raw inputs.

data processingAnalysisJustworks
Contact Center Agent Performance MetricsHard
Practice
Practice drill

Compute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.

ETLAggregationsData ModelingADP
SQL Query for Top ProductsMedium
Practice
Practice drill

Rank Natural Intelligence products by completed revenue in the last completed quarter using joins, aggregation, and a date CTE.

sql queryperformance analysisNatural Intelligence
Top Ad Campaigns by ConversionMedium
Practice
Practice drill

Rank InMobi Exchange campaigns by conversion rate using joins, aggregation, a CTE, and deterministic ordering.

sql queryperformance analysisInMobi
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4
System Design8 questions · ~67 min
Design a Payroll SystemMedium

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

system designJustworks
Generic System Design QuestionHard

Assesses your ability to structure and communicate a system design approach.

system designarchitectureJustworks
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5
Behavioral & Leadership17 questions · ~142 min
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6
More topics1 question · ~8 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 3 hands-on drills to finish this plan.