https://timileyin.dev/writing Software engineer focused on building resilient, scalable systems and clean user experiences. I care deeply about performance, architecture, and writing code that scales. Primarily working with Go, Python, and TypeScript, with a growing interest in Web3 and Solidity. en https://timileyin.dev/writing/the-myth-of-exactly-once https://timileyin.dev/writing/the-myth-of-exactly-once Fri, 29 May 2026 00:00:00 GMT Every distributed system quietly promises to do things exactly once. None of them can. Here is what really happens when your payment goes through, and the careful engineering that makes "once" feel true.