📝 New article! "Making illegal states unrepresentable" is a very powerful approach to state modeling and software design in general. It served my team well for a good part of a decade now. swiftology.io/articles/makin…

Just had a random intrusive thought that Mono Lisa would be a fun name for monospaces font. So googled it, and sure enough, it already exists! monolisa.dev

This paper on reference counting claims that Swift programs spend avg 30% of their runtime on RC. Which is quite unbelievable. Is it real? Granted, it's from 2018, and Swift coding patterns shifted more to using value types and now borrowing, but still. iacoma.cs.uiuc.edu/iacoma-papers/…

Huge fan of iOS Conf SG and it's a great honour to be on a speaker line-up. I'm bringing a new talk on managing side effects and building effect systems. There's been interesting developments in this area in mainstream functional programming, let's see how modern Swift keeps up.

I'm on Bluesky in case you want to connect bsky.app/profile/alexoz…

Yes, they really flew me all the way from London to Singapore just so I could show a photo of an elephant to iOS Conf SG audience.

The best VisionOS-related talk I've seen so far, well-presented and showcasing an actually meaningful use case (sign language recognition). Well done Monika Mateska iOS Conf SG

If you're interested in Noncopyable types, type-level programming, and State Machines, check out the recoding of my talk from Swift Heroes 2024. I had a lot of fun researching the feasibility of Typestate programming in Swift, and I'm happy about how this presentation tuned out

Caffeinated and ready to learn how to build fast and efficient apps from #Apple engineers at the new Dev Center in Battersea Power Plant.

👤 Welcome Alex Ozun🇺🇦, Staff iOS Engineer, to #swiftheroes25 🔎 with:"Controlling Side Effects with Swift" 🔍 🎙️Full talk info: swiftheroes.com/2025/speakers/ 🔍 ✅ Don't miss the presentation of the upcoming 2025 speakers — follow Swift Heroes on social media. 👥 To find out who the

There are better ways to get back to the main stage after lunch? Alex Ozun🇺🇦 🧨🧨🧨

In the second talk of iOSKonf we have Alex Ozun🇺🇦 explaining how we can avoid illegal states in our apps. This is not only relevant for us developers but also for crafting excellent experiences for our users. Love the elegant implementations he shares.

Alex Ozun🇺🇦 just delivered an incredible talk on making invalid states impossible in your app. Definitely one for the books! 🙌 #iOSKonf25

I had a blast presenting at iOSKonf this week! I heard great things about this conference and I now can say that the praise was well-deserved! It was pretty scary to be on the lineup with so many accomplished engineers, but the vibe was good and everyone was easy to be around.