Janusz Polowczyk
@januszcodes.bsky.social
iOS Developer
📍Vienna, 🇦🇹
📍Vienna, 🇦🇹
Small weekend project: Lately, I've been reading a bit about #systems #programming and thought "why not play around a bit with #audio and combine #Zig with #Swift?". I am a big fan of Andrew Kelley and dabbled a bit in the language last year (1/2)
November 3, 2025 at 5:08 PM
Small weekend project: Lately, I've been reading a bit about #systems #programming and thought "why not play around a bit with #audio and combine #Zig with #Swift?". I am a big fan of Andrew Kelley and dabbled a bit in the language last year (1/2)
Got the green light from #Apple. Hacksy version 1.0.1 is out! :) #buildinpublic #iOS #AppDevelopment #SwiftUI #Swift #HackerNews
October 22, 2025 at 7:21 PM
Got the green light from #Apple. Hacksy version 1.0.1 is out! :) #buildinpublic #iOS #AppDevelopment #SwiftUI #Swift #HackerNews
I am already working on the update to Hacksy, as I noticed couple of annoying bugs (want to ship an update in the beginning of this week), but here comes the question for the 1.1 version: Should I move to #liquidglass entirely? Let me know what you think! #buildinpublic #iOS #Apple #Swift #SwiftUI
October 19, 2025 at 6:07 PM
I am already working on the update to Hacksy, as I noticed couple of annoying bugs (want to ship an update in the beginning of this week), but here comes the question for the 1.1 version: Should I move to #liquidglass entirely? Let me know what you think! #buildinpublic #iOS #Apple #Swift #SwiftUI
Ok, I did not expect the migration to be soo swift (no pun intended). Wrapped my UISearchController into UINavigationController and have search functionality in place. Tomorrow tackling bookmarks tab! Let's get this thing #iOS26 ready! #Apple #Swift #SwiftUI #buildinpublic #liquidglass
October 15, 2025 at 8:02 PM
Ok, I did not expect the migration to be soo swift (no pun intended). Wrapped my UISearchController into UINavigationController and have search functionality in place. Tomorrow tackling bookmarks tab! Let's get this thing #iOS26 ready! #Apple #Swift #SwiftUI #buildinpublic #liquidglass
Also started to play around with #liquidglass in Hacksy and now I am tempted to change it 😬 Quite like it, but still, I'd have to re-work the logic quite substantially (given my initial approach). Let's see! #iOS #buildinpublic #iOS26 #Apple #SwiftUI #Swift
October 15, 2025 at 7:48 PM
Also started to play around with #liquidglass in Hacksy and now I am tempted to change it 😬 Quite like it, but still, I'd have to re-work the logic quite substantially (given my initial approach). Let's see! #iOS #buildinpublic #iOS26 #Apple #SwiftUI #Swift
Hacksy was submitted for a review today! Keep your fingers crossed that it all goes well! #buildinpublic #Apple #Swift #SwiftUI #app
October 15, 2025 at 7:45 PM
Hacksy was submitted for a review today! Keep your fingers crossed that it all goes well! #buildinpublic #Apple #Swift #SwiftUI #app
Created a very small #CLI tool in #Swift for myself to generate #Google #Bazel modules in #iOS projects. The tool's name is a word play on Medjool dates 😄 Check it in action! #SoftwareEngineering #SoftwareEngineer #Apple #Swiftlang #Google
September 17, 2025 at 8:14 PM
Created a very small #CLI tool in #Swift for myself to generate #Google #Bazel modules in #iOS projects. The tool's name is a word play on Medjool dates 😄 Check it in action! #SoftwareEngineering #SoftwareEngineer #Apple #Swiftlang #Google
Super happy that I tackled this once again and did not give up. Build systems are absolutely crazy and it made me realize how little I know about anything 😄 #SwiftUI #macOS #buildinpublic #iOS #iOS26
September 15, 2025 at 8:38 PM
Super happy that I tackled this once again and did not give up. Build systems are absolutely crazy and it made me realize how little I know about anything 😄 #SwiftUI #macOS #buildinpublic #iOS #iOS26
I mentioned this on twitter, but forgot to also post it here: one of the challenges that I put for myself when building Hacksy was to build a professional-grade modular architecture, where each feature is in a separate module. On top of that I wanted to have a robust build system, like #Bazel. (1/3)
September 15, 2025 at 8:34 PM
I mentioned this on twitter, but forgot to also post it here: one of the challenges that I put for myself when building Hacksy was to build a professional-grade modular architecture, where each feature is in a separate module. On top of that I wanted to have a robust build system, like #Bazel. (1/3)
As promised, Hacksy gets the update after I found out that the data fetch on pull-to-refresh is non-working. Turns out, even when forcing the refresh, it was pulling the data from the cache. Now it works correctly. #Swift #SwiftUI #buildinpublic #iOS #Apple #AppleEvent #iOS26
September 7, 2025 at 3:14 PM
As promised, Hacksy gets the update after I found out that the data fetch on pull-to-refresh is non-working. Turns out, even when forcing the refresh, it was pulling the data from the cache. Now it works correctly. #Swift #SwiftUI #buildinpublic #iOS #Apple #AppleEvent #iOS26
Implemented a feature I always wanted to have in Safari: Saving/Highlighting snippets of articles. Customizing context menu in WKWebView is amazing! #iOS #Swift #Apple #buildinpublic #iOS26 #testflight #hackernews #AppleEvent #appdevelopment
September 2, 2025 at 7:04 PM
Implemented a feature I always wanted to have in Safari: Saving/Highlighting snippets of articles. Customizing context menu in WKWebView is amazing! #iOS #Swift #Apple #buildinpublic #iOS26 #testflight #hackernews #AppleEvent #appdevelopment
No rest for the wicked! Just fixed a major bug in my app that caused it to crash. Focus mode is now working seamlessly :) always wanted to have this functionality in Reddit
app when there is some interesting discussion happening. #iOS #Swift #Apple #buildinpublic #iOS26 #programming #appdev
app when there is some interesting discussion happening. #iOS #Swift #Apple #buildinpublic #iOS26 #programming #appdev
August 30, 2025 at 8:35 PM
No rest for the wicked! Just fixed a major bug in my app that caused it to crash. Focus mode is now working seamlessly :) always wanted to have this functionality in Reddit
app when there is some interesting discussion happening. #iOS #Swift #Apple #buildinpublic #iOS26 #programming #appdev
app when there is some interesting discussion happening. #iOS #Swift #Apple #buildinpublic #iOS26 #programming #appdev
Cooking some delicious animations for Hacksy onboarding flow! #iOS #Apple #Swift #buildinpublic #testflight #UIDesign #uiuxdesign #AppDevelopment #onboarding #swiftui
August 29, 2025 at 3:08 PM
Cooking some delicious animations for Hacksy onboarding flow! #iOS #Apple #Swift #buildinpublic #testflight #UIDesign #uiuxdesign #AppDevelopment #onboarding #swiftui
A month ago I set my sights on building the best HackerNews iOS client I could. The existing ones, although great, miss the functionality I always wanted to have in a HN reader app. My app, Hacksy, is currently waiting for approval in TestFlight :) #iOS #Swift #programming #YCombinator #Apple
August 26, 2025 at 5:07 PM
A month ago I set my sights on building the best HackerNews iOS client I could. The existing ones, although great, miss the functionality I always wanted to have in a HN reader app. My app, Hacksy, is currently waiting for approval in TestFlight :) #iOS #Swift #programming #YCombinator #Apple
I am absolutely speechless! Today I received a notification of a money transfer and quickly checked revenue cat to confirm it was true. I am beyond ecstatic! Thank you to the person that bought a subscription! 🥹 #buildinpublic #ios #app #iosdev
January 30, 2025 at 7:24 PM
I am absolutely speechless! Today I received a notification of a money transfer and quickly checked revenue cat to confirm it was true. I am beyond ecstatic! Thank you to the person that bought a subscription! 🥹 #buildinpublic #ios #app #iosdev
January 2, 2025 at 4:14 PM
Good morning everyone! Bug fixed, now waiting for Apple’s approval #buildinpublic #iOS
December 30, 2024 at 7:05 AM
Good morning everyone! Bug fixed, now waiting for Apple’s approval #buildinpublic #iOS
Writing a blog post about generating audio waveforms on iOS. Topic that is very interesting from the engineering perspective. Still a lot to write though!
November 26, 2024 at 9:29 AM
Writing a blog post about generating audio waveforms on iOS. Topic that is very interesting from the engineering perspective. Still a lot to write though!
Vienna yesterday was super pretty :)
November 15, 2024 at 9:39 AM
Vienna yesterday was super pretty :)