Design (LLD) a system for online food ordering and delivery like Zomato - Machine CodingSubhahu Jain·Jul 15, 2023·8 min readTable of contentsIssues in Above Design🔥 Problem 1: Order Is a Weak, Anemic Entity❌ What we Did❌ Why This Is a Serious Design FlawSolution🔥 Problem 2: Observer Pattern for Order Updates Is Dangerous❌ What we Did❌ Why This Is a Scalability TrapSolution🔥 Problem 3: Cart Is Not Transaction-Safe❌ What we Did❌ Why This Breaks in RealitySolution🔥 Problem 4: Restaurant Availability Is Ignored❌ What’s Missing CompletelySolution🔥 Problem 5: Delivery Management Is Hand-Waved❌ Claimed Feature❌ Actual DesignSolution🔥 Problem 6: No Concurrency Control on Orders❌ What we IgnoredSolution🔥 Problem 7: Payments Are Treated as a String❌ What we Did❌ Why This Is DangerousSolution🔥 Problem 8: Reviews & Ratings Are Detached from Reality❌ What we Did❌ Why This Is WrongSolution🔥 Problem 9: MVC Is Misapplied at System Level❌ What we Claimed❌ Why This Is MisleadingSolutionAWSBeginner DevelopersCSSJavaScriptGeneral Programming
