#3 - A Change in One Service Breaks Others – How to Prevent It | Microservices Interview Question скачать в хорошем качестве

#3 - A Change in One Service Breaks Others – How to Prevent It | Microservices Interview Question

In this video, we answer a critical senior-level microservices interview question: 🚨 What happens when a change in one service breaks others? This isn’t just a technical problem. It’s a contract problem. In distributed systems, your API is someone else’s dependency. Breaking changes can cause production incidents, failed deployments, and system-wide instability. In this deep dive, we cover: • Why breaking changes happen • Backward compatibility principles • Safe vs breaking API changes • API versioning strategies • Contract testing explained • Schema evolution for event-driven systems • Expand-and-contract database pattern • Deprecation strategy best practices • Who owns backward compatibility? This is essential knowledge for: Senior backend engineers System design interviews Microservices architects Engineering leads --- 🧠 Key Takeaway: Stable systems treat compatibility as a feature, not a burden. If you're preparing for senior system design interviews, this concept is non-negotiable. 00:00 Introduction 00:40 Why Changes Break Systems 02:00 APIs as Contracts 03:15 Backward Compatibility Rules 05:10 Safe vs Breaking Changes 06:30 API Versioning Explained 08:00 Contract Testing 09:30 Schema Evolution for Events 11:00 Expand-and-Contract DB Pattern 12:20 Deprecation Strategy 13:30 Who Owns Compatibility? 14:15 Final Takeaway microservices backward compatibility api versioning contract testing system design interview senior developer interview schema evolution expand and contract pattern distributed systems event driven architecture backend architecture api breaking changes software engineering best practices #microservices #systemdesign #backendengineering #softwarearchitecture #interviewprep #apis