https://yashsachdeva.com/tags/payment-system/ Recent content in Payment System on Tech Blog Hugo -- gohugo.io en © 2026 Yash Sachdeva Thu, 09 Apr 2026 19:39:08 +0530 https://yashsachdeva.com/posts/mobile-wallet-payment-system/ Thu, 09 Apr 2026 19:39:08 +0530 https://yashsachdeva.com/posts/mobile-wallet-payment-system/ <p>As part of this post, we&rsquo;ll be covering the design of a mobile wallet payment system that supports -</p> <ul> <li>Top-ups (add money to wallet from bank/card)</li> <li>P2P transfers (wallet -&gt; wallet)</li> <li>Basic fraud detection</li> <li>Concurrency with clear trade-offs between strong and eventual consistency at scale.</li> </ul> <p>Let&rsquo;s start with a basic design and then we can scale it up.</p>