Alex Ozun @alexozun.com · 25/09/2026I had a privilege of writing this week's issue of iOS Dev Weekly. It's now live and should be making its way into your inboxes. I hope you enjoy it! iosdevweekly.com/issues/769/iosdevweekly.comIssue 769 – iOS Dev Weekly 010
Alex Ozun @alexozun.com · 10/09/2026I have to say, using an electric guitar whammy bar as an example of the iPhone Duo hinge API was bloody genius! youtu.be/Biqw19XiqQY?...youtu.beLeverage multiple displays and scenes on iPhone Duo | AppleYouTube video by Apple Developer 010
Alex Ozun @alexozun.com · 28/08/2026This week's issue of iOS Dev Weekly is now live and making its way into your inboxes. Happy Friday! iosdevweekly.com/issues/765/iosdevweekly.comIssue 765 – iOS Dev Weekly 020
Alex Ozun @alexozun.com · 15/08/2026I *might* play around with a more direct nohello style website later, but for now, this should suffice. 000
Alex Ozun @alexozun.com · 15/08/2026I know a couple of similar short domains for the meat proxy already exist that replicate nohello.net, but I didn't quite like how any of them where written, and I think the original article is already short and sweet. I also like that the author gets direct attribution, and not just a footnote. 100
Alex Ozun @alexozun.com · 15/08/2026Just registered a domain nomeatproxy.net that redirects to the original article "Don't be a meat proxy" by Niklas Gruhn - which gives name to the new pervasive behaviour that plagues workspaces. I wanted a short domain that I could put it on my Slack status, where I'd previously have nohello.netnomeatproxy.netDon't be a meat proxy 140
Alex Ozun @alexozun.com · 03/08/2026I worked on the latest issue, which went out last Friday. Take a look if you missed it. If you have any feedback, feel free to shoot me a message. iosdevweekly.com/issues/761/iosdevweekly.comIssue 761 – iOS Dev Weekly 040
Alex Ozun @alexozun.com · 03/08/2026As some of you may have noticed, I've joined the editorial team of the legendary iOS Dev Weekly newsletter. It's a huge responsibility and an opportunity to contribute to the Apple developer community, one I don't take for granted. 160
Reposted by Alex OzunScott Smith @scottsmithdev.bsky.social · 27/05/2026A major part of my CLAUDE md file is always all of @alexozun.com’s teachings on Type-Driven Design in Swift. It remains, to this day, the most powerful Swift content I’ve ever read. Your agents will output MUCH better code with it. swiftology.io/collections/...swiftology.ioType-Driven Design with Swift | SwiftologyLearn how to use Swift's flexible type system to design high-quality, robust, and correct programs. 071
Alex Ozun @alexozun.com · 16/02/2026This is my reinterpretation of Kent Beck's old tweet. But it accurately describes what my experience leveraging agents effectively has been like so far. x.com/KentBeck/sta...x.com 020
Alex Ozun @alexozun.com · 16/02/2026Make the AI agent’s job easy (warning: this may be hard), then give it an easy job. 130
Alex Ozun @alexozun.com · 08/02/2026Featuring works of: - @pepicrft.bsky.social - @massicotte.org - Saagar Jha - ...and others 020
Alex Ozun @alexozun.com · 08/02/2026I initially planned this as a short post on socials, but it quickly evolved into a blog. Here’s my recommended reading list to get you from Zero to Hero in Swift Concurrency. It’s based on my own learning journey, with adjustments that work better for 2026. swiftology.io/articles/swi... #swiftlangswiftology.ioSwift Concurrency from Zero to Hero | Reading List | SwiftologyIn this short post I want to recommend an ordered reading list that will get you from Zero to Hero in Swift Concurrency 150
Alex Ozun @alexozun.com · 30/01/2026Today at #fosdem #swiftlang in Brussels. Greeted with a perfect swag for a nippy winter day. 0203
Alex Ozun @alexozun.com · 05/01/2026The library also enables deterministic testing of unstructured Swift Concurrency. If you're interested, please give the project description a read and share your feedback and ideas. #swiftlang 030
Alex Ozun @alexozun.com · 05/01/2026In tests, the same mechanism powers *mock-less* testing of behaviours: observable effects can be intercepted, suspended, and resumed with just-in-time test data, without invasive scaffolding or test-only abstractions in application code, commonly required by DI libs and arch frameworks. #swiftlang 120
Alex Ozun @alexozun.com · 05/01/2026With just two lightweight abstractions, Effects and Effect Handlers, it enables natural composition of behaviours while keeping application code linear, procedural, and easy to reason about. #swiftlang 100
Alex Ozun @alexozun.com · 05/01/2026Swift Effect is now in public preview! it is an architecture-agnostic effect system that makes side effects (such as I/O, networking, randomness, concurrency) controllable, composable, and testable without forcing structural changes to your application code. github.com/Alex-Ozun/sw... #swiftlanggithub.comGitHub - Alex-Ozun/swift-effect: Algebraic Effects and Effect Handlers for SwiftAlgebraic Effects and Effect Handlers for Swift. Contribute to Alex-Ozun/swift-effect development by creating an account on GitHub. 1146
Alex Ozun @alexozun.com · 05/01/2026In tests, the same mechanism powers *mock-less* testing of behaviours: observable effects can be intercepted, suspended, and resumed with just-in-time test data, without invasive scaffolding or test-only abstractions in application code, commonly required by DI libs and architectural frameworks. 000
Alex Ozun @alexozun.com · 05/01/2026With just two lightweight abstractions, Effects and Effect Handlers, it enables natural composition of behaviours while keeping application code linear, procedural, and easy to reason about. 100
Alex Ozun @alexozun.com · 18/12/2025Dijkstra predicted in 1978 how people would feel about #Swift Strict Concurrency checking in 2025. 1111
Alex Ozun @alexozun.com · 11/11/2025Hey friend, I've got a new article on Swift Testing for you! 📝 I share my insights on avoiding common pitfalls of Parameterized Tests, gained from overseeing the migration of tens of thousands of tests from XCTest to Swift Testing. swiftology.io/articles/pit... #swiftlang #swiftswiftology.ioPitfalls of Parameterized Tests | SwiftologyIn this article, I share my experience adopting Swift Testing at scale and the lessons I learned about **Parameterized Tests**, including five common pitfalls teams may encounter. I also recommend bes... 081
Alex Ozun @alexozun.com · 22/10/2025Hey look what just dropped! A recording of my recent talk from iOSKonf25! The recording didn't capture the stage camera's feed, but that's totally fine because I have a radio face anyway 🫥 youtu.be/AnUS_zmSnVg #swiftlang #swiftui #iosyoutu.beMake Invalid States Impossible in Your App | iOSKonf25 | Alex OzunYouTube video by iOSKonf 062
Reposted by Alex OzunMatt Massicotte @massicotte.org · 13/06/2025Finally got around to watching @alexozun.com‘s talk here. Truly fascinating stuff, and I learned something about non-Copyable types too! youtu.be/qPHjDlqHsUQ?...youtu.beTypestate - the new Design Pattern in Swift 5.9 | Swift Heroes 2024 TalkYouTube video by Swift Heroes 2143
Alex Ozun @alexozun.com · 09/06/2025RIP Google's #Flutter team who will have to replicate the Liquid Glass look and feel for their Cupertino widgets. #wwdc 0110
Reposted by Alex OzunOliver Binns @oliverbinns.co.uk · 20/05/2025This is the second time I’ve seen @alexozun.com’s talk on making invalid state impossible and it’s a really cool approach to improved software safety! 131
Alex Ozun @alexozun.com · 20/05/2025Doug Gregor takes the stage of @swiftcraft.bsky.social with a keynote talk On Progressive Disclosure in #swiftlang 120
Alex Ozun @alexozun.com · 16/05/2025I had a blast presenting at #iOSKonf25 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 and speakers, but the vibe was really good and everyone was easy to be around. 031
Reposted by Alex OzunDaniel Saidi @danielsaidi.bsky.social · 14/05/2025Next up: @alexozun.com on how to make invalid states impossible in your app. 031
Alex Ozun @alexozun.com · 10/04/2025Thanks! I'll share the recording when it's published on YouTube 020
Alex Ozun @alexozun.com · 10/04/2025Thank you Peter! And thanks again for borrowing your clicker (I'd already added it to my Bday wish list 😀) 010
Alex Ozun @alexozun.com · 10/04/2025I think I managed to successfully trick the audience into thinking we were simply describing effects with enums, until finally revealing that we’d actually learned something that *supposedly* requires a PhD in Computer Science to understand (spoiler: it really doesn’t!). 140
Alex Ozun @alexozun.com · 10/04/2025The secret to introducing people to scary-sounding concepts like Free Monads in #swiftlang is in never mentioning these two words until the very end of the presentation. 3241
Alex Ozun @alexozun.com · 08/04/2025Tiers of Swift development sins by Pietro Messineo at @swiftheroes.bsky.social 020
Alex Ozun @alexozun.com · 27/03/2025I am, of course, just bastardising the en.m.wikipedia.org/wiki/Fundame...en.m.wikipedia.orgFundamental theorem of software engineering - Wikipedia 010
Alex Ozun @alexozun.com · 27/03/2025Good software design is about adding the necessary amount of indirection without compromising performance too much. Good performance optimization is about removing unnecessary indirection without compromising software design too much. 140
Alex Ozun @alexozun.com · 27/03/2025@dustyn thank you, I'm pretty sure they will be! And I'll make sure to repost them on social media and my blog 000
Alex Ozun @alexozun.com · 26/03/2025Heading into 2025 with 3 brand-new talks is kinda crazy, but I'm feeling good about this decision. I'm excited to share these talks with the community later this year! If you'll be at any of these conferences, drop me a message. 030
Alex Ozun @alexozun.com · 26/03/2025Now, that it's official, I'm sharing my 2025 #swiftlang conference schedule, so far: 1. Swift Heroes (April 8-9): Controlling Side Effects with Swift. 2. iOSKonf (May 13-15): Make invalid state impossible in your apps. 3. Swift Craft (May 20-21): Swift Abstractions Demystified. 470
Alex Ozun @alexozun.com · 13/03/2025Feedback like this is what keeps me going (even at my snail's pace 😅) 080
Alex Ozun @alexozun.com · 13/03/2025I primarily draw info from Scala community that has a wealth of info on effect systems. Swift and Scala are closely positioned in this field, both being capable FP langs with expressive type systems, and both being impure, requiring good effect systems and disciplines to control side effects. 010
Alex Ozun @alexozun.com · 13/03/2025My article is almost finished and it goes into great detail on various effect systems in Swift, including monadic effects and effect descriptors. I go from first principles, how continuation-passing style gives rise to unidirectional architectures, and how we could possible go back to direct style. 120
Alex Ozun @alexozun.com · 13/03/2025There's precious little info on effect systems in Swift community 😔 the largest resource on monadic effects is @pointfree.co and TCA that makes great use of them. Our own architecture at Amex uses effect descriptors, but it's not OSS. The Elm Architecture is the closest resource I know on that. 120
Alex Ozun @alexozun.com · 12/03/2025Hey Francisco 👋 I'm really glad you liked it and thank you for your feedback 🙌 110
