System Design Interview Roadmap

System Design Interview Roadmap

API Versioning Strategies for System Evolution

Article: Issue #138

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SD & AI
Oct 24, 2025
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The Silent System Killer: When APIs Evolve Wrong

Your mobile app just pushed a critical security update to 50 million users. Within hours, legacy Android devices start crashing because they can’t handle your new API response format. Meanwhile, your latest iOS app expects new fields that your old API version doesn’t provide. Sound familiar? This is API versioning gone wrong—the hidden complexity that turns system evolution into system chaos.

Today we’ll master the art of evolving APIs without breaking everything, exploring strategies that keep Netflix streaming to billions while continuously deploying new features.

What You’ll Learn

  • Five battle-tested versioning strategies and their hidden trade-offs

  • How major platforms handle backward compatibility at scale

  • Production patterns for zero-downtime API evolution

  • Monitoring strategies that prevent versioning disasters

  • Hands-on implementation of a multi-version API system

Youtube Link:

The Versioning Strategy Matrix

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