Get your tickets for Infobip Shift 2023 at https://shift.infobip.com/ https://twitter.com/InfobipShift Have you ever used a SaaS and thought: "They don't have this one feature I want, I wish I could implement it myself" (e.g. edit tweets)? Well, we did, and that's why we gave our customers an escape hatch of being able to add functionality we haven't implemented (yet!). In this talk, I'd like to present how a small team of 4 engineers built a serverless compute platform by combining serverless AWS services in a matter of weeks, not years. You'll learn what are the key challenges of building a system like this, what to avoid and how we securely run users' code. And the best part? The whole system - frontend, backend, infrastructure is all built in a single programming language - TypeScript.