You've been hired to migrate an organization from Ruby to Scala—two very different languages. It's your first day on the job. Now what?

In two years Riskified went from 2 Scala developers to 30, over 7 training rounds. Starting from a narrow focus on the immediate future, our mindset gradually shifted to "how to write good code" to "how we code".

In this talk I will describe how we evolved from training developers to forming a community inside the company, and share with you some strategies appropriate for growing companies.