In this talk we will cover how we design, build, and scale our platform to handle 5 million requests per second, 200 billion financial transactions a day and 175+ TBs of daily data processing distributed globally while handling unexpected unbounded growth. We will explain the rapid growth challenges we tackle every day in the areas of planning, releasing, monitoring and scaling our distributed systems with four nines of uptime. We will cover real-time updates of business logic with zero downtime, control systems and feedback loops, monitoring and app/event introspection.