Design a phased migration plan for Top 10 without hurting users

Problem Statement Description

Product context: Netflix is a streaming entertainment company; its products include subscription video, original films and series, recommendations, profiles, games, and ad-supported plans.

Netflix’s Top 10 experience helps members quickly understand what is popular and decide what to watch. Imagine Netflix is migrating Top 10 to a new version of the product and/or underlying serving system for international subscribers, where the experience may need to support more localized ranking, different content catalogs, multiple languages, ads-supported plans, games, live events, and market-specific viewing behavior.

Your task is to design an execution plan for this migration without degrading the member experience. The plan should account for the fact that Top 10 is highly visible, influences content discovery, and can affect trust if rankings feel stale, irrelevant, unavailable, or inconsistent across devices and countries.

This is not a request to redesign the Top 10 feature itself. Focus on how you would phase the migration, coordinate teams, manage dependencies, monitor impact, and make decisions about rollout, rollback, and communications.

The experience should consider:

- Which users, countries, platforms, and surfaces are included in each migration phase

- Dependencies across ranking systems, catalog availability, localization, client apps, experimentation, data pipelines, and content operations

- Go/no-go criteria before expanding rollout, including quality, reliability, engagement, and member-impact thresholds

- How to detect and mitigate issues such as missing rows, stale rankings, incorrect localization, inconsistent titles, latency, or ranking regressions

- Ownership across product, engineering, data science, design, content, localization, customer support, and regional teams

- Rollback or fallback plans if the new Top 10 experience harms discovery, playback starts, retention signals, or support volume

- Communication needs for internal stakeholders and any external member-facing changes, especially in sensitive international markets

The goal is to show how you would lead a safe, measurable, cross-functional migration for a prominent Netflix discovery feature while preserving member trust, streaming quality, and business outcomes across diverse global markets.