Serhii Kushnir

Software Engineer

[Serhii Kushnir @kuserhii]

@DoberGroup Їхній конкурент?

[Serhii Kushnir @kuserhii]

are starting to outweigh the convenience of writing SwiftUI code for me. Apple is trying to improve SwiftUI’s performance (@Observable macro as an example), but it still doesn’t seem to be enough for truly high-performance apps

[Serhii Kushnir @kuserhii]

The more I work with SwiftUI (and it’s been over three years now), the more I find myself drawn back to UIKit. The lack of a proper collection view, the endless UI updates, the smoothness of UIView’s animated data updates while scrolling, and a million other shortcomings ..

[Serhii Kushnir @kuserhii]

Моя історія про те, як я «хакнув» Сільпо. Або як міг купувати продукти за ваші гроші

[DOU @doucommunity]

Як робота над застосунком для карток лояльності несподівано привела до виявлення справжньої уразливості в офлайн‑ритейлі.

Сергій Кушнір, iOS‑інженер у Lockerverse, розповідає, як аналіз динамічного коду карток Сільпо переріс у пошук логічної діри, експерименти з алгоритмами генерації та усвідомлення того, що бонуси можна було списувати без жодних підтверджень.

👉️️️️️️ https://t.co/bkUYWcOgTr

[Serhii Kushnir @kuserhii]

@itRockoOfficial @doucommunity топчік

[Serhii Kushnir @kuserhii]

We definitely need it on iOS too

[Roman Khrupa @romankhrupa]

A Power Saving Mode concept for Spotify, inspired by Google Maps

It would be cool if Google provided a new API in Android 17 that allowed apps to appear like this on the lock screen 🚀

[Serhii Kushnir @kuserhii]

In the new version, I’ve packed in a bunch of cool goodies — and most importantly, added a bee 🐝

Just long-press a card and... you can select, move, delete, or change the emoji. Enjoy!
#CardWallet 🚀

Link to update:

https://t.co/QHf3TDrGWT

[Serhii Kushnir @kuserhii]

It’s true 😅

[Anum  @anumness]

Building an app is 30% coding and 70% editing App Store screenshots.

[Serhii Kushnir @kuserhii]

I definitely need it in my app 🚀

[Point-Free @pointfreeco]

Would you believe that adding iCloud sync to an app can be as simple as adding a single line of code?

[Serhii Kushnir @kuserhii]

Нє ну нє, оце я розумію старт, перша версія застосунку в перші 2 дні потрапляє в топи і доганяє Opera Browser 😅

[Serhii Kushnir @kuserhii]

My app hit the top
#SwiftUI

[Serhii Kushnir @kuserhii]

@seanallen_dev Same M1 Pro the love

[Serhii Kushnir @kuserhii]

Here we go!

An app to store loyalty cards locally.
Free, no ads, only on device, iCloud backup.

#iOS #iOS26 #SwiftUI

https://t.co/QHf3TDr97l

[Serhii Kushnir @kuserhii]

@sanio9270 Дякую!

[Serhii Kushnir @kuserhii]

My app just got its first subscribers 🎉❤️

[Serhii Kushnir @kuserhii]

@Yuliia__Yuliia Thank you!

[Serhii Kushnir @kuserhii]

@SebastianRoehl Nice

[Serhii Kushnir @kuserhii]

Just made a cool from O to X animation. Metal is so powerful tool!

#ios #metal #coolanimations

[Serhii Kushnir @kuserhii]

So true 😁

[Jay Dwivedi @jaydwivedi_]

I lost count of how many apps have this icon.

[Roman Khrupa @romankhrupa]

Excited to announce the official release of the @apolloaiapp Android! 🚀
It’s been a great journey building this together with the talented team at @liquidai
We’ve put a lot of effort into making a product you’ll truly enjoy — and we can’t wait for you to experience it ❤️