Mar 6
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Vivek Gupta: How Apps Prevent Duplicate Orders! | This System Design Trick Saves Millions A slow internet connection can send the same request multiple times without you realizing it. Imagine clicking the Place Order button again and again because the app looks stuck. Without protection, the server could treat every click as a new order and charge you multiple times. Backend systems solve this using idempotency keys. Each request carries a unique ID so the server processes it only once, even if the request is retried. Concepts like this are widely used in distributed systems and are also important for system design interviews at Big Tech companies. Leave a like, comment, and subscribe for more. Check out AlgoZenith: https://maang.in/ ----------------------------------------------- 😃 ABOUT ME I’m Vivek, an engineer, Ex-Googler, ICPC World Finalist turned educator, and founder of AlgoZenith. I’ve taught Data Structures, Algorithms, and Competitive Programming to over 3000+ students and worked with 10+ engineering colleges to bridge the gap between college learning and real-world tech careers. Through AlgoZenith, I help students crack top product-based companies and become industry-ready. On this channel, you’ll find videos on coding strategies, roadmaps, interview prep, problem-solving techniques, and everything you need to level up your software career. If that’s your thing, do subscribe and hit the bell icon so you don’t miss a thing 🙂 ----------------------------------------------- 📲 SOCIALS Instagram: https://www.instagram.com/vivekgupta.ai/ Twitter: https://x.com/vg19988 LinkedIn: https://www.linkedin.com/in/acraider/ Codechef (5 ⭐️): https://www.codechef.com/users/acraider Codeforces (Master, max. 2269): https://codeforces.com/profile/acraider ----------------------------------------------- 🏷️ TAGS idempotency key, idempotency keys explained, duplicate payment prevention, backend system design, distributed systems concepts, system design interview prep, faang system design, payment system design, api idempotency, backend engineering concepts, prevent duplicate requests, api design best practices, payment reliability systems, backend architecture patterns, scalable backend systems, software engineering interviews, system design basics, large scale systems, tech architecture, backend interview concepts ----------------------------------------------- #️⃣ HASHTAGS #coding #interview #engineer