In today’s world, where business operates 24/7, system downtime can cost millions of dollars. Fault tolerance has evolved from a nice-to-have feature into a critical necessity. As an architect of high-load systems for iGaming and FinTech, I want to share principles that will help build reliable systems from the ground up. Rethinking Fault Tolerance: From Theory to Practice Fault-tolerant architecture isn’t a utopia where nothing breaks. A system can remain useful even when partially compromised. The real world is unpredictable: nodes fail, network connections break, and external services become unavailable. Once, an excavator damaged internet cables near our data center.…