At Attio, one TypeScript codebase powers everything from our powerful UI to our flexible data integrations. In this talk, I’ll show how we embrace radical pessimism — always assuming things will go wrong — as a guiding principle for building resilient systems. Using functional programming concepts, we handle errors and loading states across the stack in a type-safe, ergonomic way. You’ll learn how pessimistic thinking in programing can lead to safer, more consistent code — and take home practical patterns you can use immediately.

We all love using TypeScript but sometimes the try/catch loop gets too complicated. Let's see how we can leverage the type system that Rust uses to make our errors look cleaner and better.

When it comes to composing business logic into services, we've had our fair share of how to do, structure, organize, and call them from within our application. It's especially difficult without opinionated frameworks and the (not so great) native error handling of JavaScript. Especially when it comes to Promises. In my talk, discover how to structure services that gracefully handle errors (with type safety), how to work with promises in a predictable way and how monads can make your life easier.

About Joe: I'm a Lead Software Engineer and a huge DX enthusiast since everybody seems to only care about UX (what about us? 😢) I've started working with TypeScript around 3-4 years ago and I'm not sure whether that's a good thing or not 🙃.

When it comes to composing business logic into services, we've had our fair share of how to do, structure, organize, and call them from within our application. It's especially difficult without opinionated frameworks and the (not so great) native error handling of JavaScript. Especially when it comes to Promises. In my talk, discover how to structure services that gracefully handle errors (with type safety), how to work with promises in a predictable way and how monads can make your life easier.

About Joe: I'm a Lead Software Engineer and a huge DX enthusiast since everybody seems to only care about UX (what about us? 😢) I've started working with TypeScript around 3-4 years ago and I'm not sure whether that's a good thing or not 🙃.