Viber Software Engineer Interview Questions

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

Implement Binary Search

Easy

Tests algorithm implementation skills and correctness reasoning.

RecursionArraysSearching

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What You Do At Work

Easy

Tests your ability to communicate your current responsibilities and security impact clearly.

Jobs to Be DoneUser NeedsValue Proposition

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Design Smart Message Delivery Ranking

Hard

Design an ML driven message delivery and prioritization system for a large real-time messaging product.

Feature StoreRetrievalModel Serving

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Detecting Race Conditions in Concurrency

Hard

Tests concurrency debugging skills and strategies to ensure thread-safe behavior.

InfrastructureQuality

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Scaling Microservices Considerations

Hard

Tests infrastructure and architecture trade-offs for scaling distributed services reliably.

InfrastructureQuality

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SQL vs NoSQL Trade-offs

Medium

Tests data modeling and storage decision-making for scalable messaging workloads.

InfrastructureData Modeling

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