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Today’s guest Kir Shatrov is a production engineer on Shopify based in London, UK. Today, he and the panel are discussing capacity planning. Kir believes that capacity planning becomes a priority when your company starts losing money and your customers are suffering. When someone does get to the point of scaling their app, it’s important to look at the limitations of the hosting service. It is also important to remember that scaling is not a job that is ever completed.Kir talks about his experience and time with Shopify and what types of changes have happened in the four years he’s been with the company. Kir explains that when Shopify was founded about 12 years ago, they were some of the first contributors to Rails, and Rails was just a zip file they shared over an email. This is important to know because the monolith code for Shopify has never been rewritten, so they put a lot of care into keeping it working. He talks about some of the techniques Shopify uses to avoid splitting into microservices when scalin