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Updated weekly · Last refresh Aug 30

Toast Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 26 questions · ~209 min
Best Buy and Sell ProfitMedium

Tests your ability to design an efficient algorithm for a classic optimization problem.

ArraysAlgorithmsoptimizationToast
Palindrome Validation With ConstraintsMedium

Tests your ability to implement correct string-processing logic under explicit constraints.

StringsAlgorithmsvalidationToast
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2
System Design8 questions · ~64 min
High-Traffic Ordering Data StoresHard

Tests your database selection skills for scale, latency, consistency, and operational complexity.

Trade-offssystem architecturedatabase designToast
Scalable API DesignHard

Tests API design principles, versioning, and operational considerations for growth and long-term maintenance.

api designmaintainabilityscalabilityToast
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3
Behavioral & Leadership11 questions · ~88 min
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4
More topics5 questions · ~40 min
Salesforce Security and Trigger RecursionMedium

Assesses Salesforce security knowledge and debugging/prevention of trigger recursion issues.

Toast
Vision, Strategy, and PlanHard

Evaluates strategic thinking and planning for product and engineering execution at Toast.

Strategic PlanningToast
API Response Business RulesMedium

Assesses ability to map API data to business-rule-driven property selection.

Toast
End-to-End MVVM Mock API ScreenHard

Evaluates ability to build a maintainable, testable UI feature with clean architecture patterns.

mvvmintegrationclean architectureToast
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Sum From 1 to 1,000,000Easy
Practice
Practice drill

Calculate the sum of integers from 1 to 1,000,000 using PostgreSQL aggregation and filtering.

AlgorithmsVirtu Financial
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
Basic SQL and String ReverseEasy
Practice
Practice drill

Reverse Costar property search strings with PostgreSQL and flag rows whose stored expected value does not match.

sql queriesstring manipulationCostar
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.