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Updated weekly · Last refresh Oct 17

Booking Backend Engineer Interview Questions

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

30questions
~4htotal time
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1
System DesignStart here. 10 questions · ~82 min
Booking Feature System DesignHard

Evaluates system design skills for a real Booking.com feature, including tradeoffs and scalability.

Booking
Notification System for ConfirmationsMedium

Evaluates design for reliable delivery of booking confirmation notifications.

system designnotification systemBooking
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2
Coding6 questions · ~49 min
Live Coding With OptimizationMedium

Tests practical coding under time pressure and ability to optimize for real backend constraints.

optimizationBooking
90-Min OA REST APIMedium

Evaluates readiness to implement REST API functionality under interview time constraints.

Booking
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3
Behavioral & Leadership10 questions · ~82 min
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4
More topics4 questions · ~33 min
90-Min OA SQL ProblemMedium

Assesses SQL fundamentals and problem-solving for data queries in a time-boxed setting.

sqlBooking
REST API and SQL FundamentalsEasy

Evaluates core backend fundamentals across APIs and SQL for data access.

fundamentalssqlBooking
Distributed Data ConsistencyHard

Tests your understanding of consistency models, transactions, and reliability patterns in microservices.

Trade-offsSuccess CriteriaRisk AssessmentBooking
SQL Insights From Booking DataMedium

Tests SQL proficiency and data manipulation skills on booking-related datasets.

Data Manipulationsql queriesBooking
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Join Strategy: Merge vs HashHard
Practice
Recently asked
Practice drill

Explain merge join versus hash join and relate plan selection to ordering, memory, and input volume.

database optimizationlarge datasetsJoinsBooking
SQL, Graphs, and StatsMedium
Practice
Practice drill

Prepare Booking search and booking metrics for business analysis, visualization, and basic statistical comparison.

data accuracybusiness problemstatisticsBooking
Sequential Behavior with Window FunctionsHard
Practice
Practice drill

Use four window functions to order user events, identify ties, and compare each event with adjacent behavior.

Window FunctionsLag/LeadData ManipulationBooking
The finish line: interview-readyComplete all 30 questions plus 3 hands-on drills to finish this plan.