Wix interview questions and how to prepare

1. Imagine a user is trying to add a custom domain to their Wix site, but they are encountering an error message: 'DNS propagation taking longer than expected. Please try again in a few hours.' How would you debug this issue, considering Wix's global infrastructure and the various DNS providers users might be using?

   Software EngineerDebugging and System UnderstandingTests: Evaluates debugging skills, understanding of distributed systems, and ability to reason about external dependencies in a large-scale product.

2. Wix offers a wide range of app integrations. If we were experiencing performance degradation on the 'Wix Stores' backend, and suspecting a third-party app integration is causing it, what steps would you take to identify the problematic app and mitigate the impact?

   Software EngineerSystem Performance and IntegrationsTests: Assesses ability to diagnose performance issues in a complex ecosystem with external dependencies.

3. Wix's editor allows users to drag and drop elements. Describe the technical challenges and potential solutions for ensuring a smooth, responsive, and consistent editing experience across various devices and browsers, especially for complex layouts with many elements.

   Software EngineerFrontend Performance and ResponsivenessTests: Tests understanding of frontend architecture, performance optimization, and cross-browser compatibility.

4. Consider the scale of Wix's user base. If we are rolling out a new feature to the Wix Editor that impacts how images are loaded and displayed, what strategies would you employ to ensure the rollout is safe, monitor its performance, and have a rollback plan?

   Software EngineerLarge Scale Deployments and MonitoringTests: Evaluates experience with safe deployment strategies, monitoring, and incident response at scale.

5. Wix uses a microservices architecture. Design a service that handles user authentication for all Wix products. What are the key considerations for availability, security, and scalability?

   Software EngineerSystem Design: Authentication ServiceTests: Assesses system design skills, particularly for critical services like authentication, focusing on distributed system principles.

6. Wix Ads is a product that helps users advertise their businesses. If a user reports that their Wix Ads campaigns are not performing as expected, what data would you look at to diagnose the problem, and what potential optimizations could you suggest?

   Software EngineerProduct Specific Debugging: Wix AdsTests: Tests ability to apply technical problem-solving to a specific Wix product and understand its business logic.

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