Top 10
Prep plan
Updated weekly · Last refresh Sep 24

Viber Backend Engineer Interview Questions

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

10questions
~1htotal time
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1
System DesignStart here. 5 questions · ~41 min
High Availability in MicroservicesHard

Tests your approach to designing resilient microservices with fault tolerance and high availability.

high availabilityfault tolerancemicroservicesViber
Message Queuing for DecouplingMedium

Evaluates your understanding of message queues and how they improve system modularity and reliability.

architectureViber
High-Traffic API BottlenecksMedium

Tests your performance troubleshooting skills for high-traffic backend systems.

bottlenecksViber
Chat Storage Trade-OffsMedium

Assesses your ability to choose data stores based on consistency, scalability, and access patterns.

database designdata storageViber
Real-Time Messaging at ScaleHard

Evaluates your system design for scalable, low-latency messaging under heavy concurrency.

system architecturescalabilityViber
2
Behavioral & Leadership4 questions · ~33 min
Explaining a High-Impact ProjectEasy

Tests whether you can clearly explain a past project with ownership, decision-making, and measurable impact.

Communicationrecent projectstechnical experienceViber
Balancing Quality Against Delivery PressureMedium

Tests ownership and prioritization in managing code quality and technical debt without sacrificing delivery.

CommunicationOwnershipPrioritizationViber
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3
More topics1 question · ~8 min
URL Shortener and CollisionsHard

Evaluates backend coding skills for designing an in-memory URL shortener with collision handling.

SortingViber

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