As the CTO of a fast-growing financial app, I never imagined that a tiny flaw in our system could open the door to attackers. But one day, a hidden issue called a race condition allowed hackers to drain over 70 million in just minutes. We were blindsided.

In this talk, I’ll share the story of how it happened which I haven't shared anywhere, how we tracked down the vulnerability, and the hard lessons we learned along the way. You’ll get a behind-the-scenes look at how these hidden threats can silently cause massive damage to financial systems and, more importantly, how to prevent them.

With live demos and real-world examples, I’ll break down what race conditions are, why they’re so dangerous in financial transactions, and the practical steps you can take to protect your own systems from these invisible threats.

If you have any application online, this is a race you don’t want to win.