Kyle Lee, also known as Kilo Loco, joins John to go behind the scenes of Publish — the static site generator used to build Swift by Sundell. Also, how to make a code base accessible to new team members, learning from open source, getting started with Swift-based web development, and much more.

Tobias Due Munk joins John to talk about using SwiftUI to build prototypes, how third party developers can extend SwiftUI’s built-in APIs in various ways, and to discuss the challenges of writing highly dynamic systems in Swift.

Dave Abrahams joins John to talk about Protocol-Oriented Programming and how to make the most out of the Swift Standard Library. Also, discussions on Swift’s overall design, why it puts such a strong emphasis on value types and protocols, and how it’s been influenced by other languages.

Christian Selig, creator of the Apollo Reddit app, joins John to talk about building apps against third party APIs, and what sort of criteria an app needs to meet to be considered a “good platform citizen”. Also, REST vs GraphQL, architecting API clients, and more.

Holly Borla and Grace Kendall, both software engineers at Apple, join John to go on a deep dive into the Swift Playgrounds app and Swift 5.2’s new diagnostics engine. Also, how Swift Playgrounds was ported to the Mac using Catalyst, and Swift’s role in education and as a language for beginners.

Leah Culver, co-founder and CTO of the Breaker podcast app, joins John to talk about her journey from iOS developer to startup founder, building MVPs and prototypes, iterating on and maintaining a code base, and growing a development team. Lots of tips and learnings about everything from app architecture to hiring.

Ryan Nystrom returns to the show accompanied by designer Brian Lovin, to go behind the scenes of the new GitHub mobile app which the two have been building. Also, creating a design system, building custom controls, and more discussions on how developers and designers can work better together.

Meng To, founder of Design+Code, joins John to go on a deep dive into SwiftUI from a design perspective, and to talk about how developers and designers can build scalable and flexible UIs using it. Also, structuring view code and components, the power of modifiers, and how SwiftUI compares to other UI tools and platforms.

On this special Stacktrace cross-over episode of the show, Gui Rambo joins John to talk about building custom developer tools, how open Apple’s tooling really is, writing “Swifty” code versus shipping great user experiences, and much more.

Sean Allen joins John to kick off the fourth season of the show, by talking about interview processes, goal setting, prioritizing projects, and what we might expect from Swift and Apple’s developer tools in 2020.