Oleksandr Leushchenko 🇺🇦

u24.gov.ua - United 24
savelife.in.ua/en/ - Come back alive prytulafoundation.org/en - Prytula Foundation
yellow-tape.com.ua/home-eng - Yellow Tape Foundation
koloua.com/en/ - KOLO

As usual, if you enjoy the article, the best way to show your appreciation now is by supporting my country - Ukraine 🇺🇦If you can afford it, I encourage donations to well-established charity foundations (except for the Red Cross), here are a few:

When “Good Enough” Is Neither Good nor Enough Why shortcuts compound unpredictably in long-lived codebases

I’ve seen many strong teams slowed down by code they wrote themselves. Not because it was bad, but because it was “good enough” at the time.

I wrote about why this happens in settled teams, and how I try to reason about it: olexale.medium.com/when-good-en...

But Dart’s Records make this so much nicer:
𝘧𝘪𝘯𝘢𝘭 (𝘢, 𝘣, 𝘤) = 𝘢𝘸𝘢𝘪𝘵 (𝘰𝘱𝘦𝘳𝘢𝘵𝘪𝘰𝘯𝘈(), 𝘰𝘱𝘦𝘳𝘢𝘵𝘪𝘰𝘯𝘉(), 𝘰𝘱𝘦𝘳𝘢𝘵𝘪𝘰𝘯𝘊()).𝘸𝘢𝘪𝘵;

✨ No casts.
✨ No hidden index dependencies.
✨ Much cleaner, safer, and more readable.

And now you know it too 😁

Example:
𝘧𝘪𝘯𝘢𝘭 𝘳𝘦𝘴𝘶𝘭𝘵𝘴 = 𝘢𝘸𝘢𝘪𝘵 𝘍𝘶𝘵𝘶𝘳𝘦.𝘸𝘢𝘪𝘵([𝘰𝘱𝘦𝘳𝘢𝘵𝘪𝘰𝘯𝘈(), 𝘰𝘱𝘦𝘳𝘢𝘵𝘪𝘰𝘯𝘉(), 𝘰𝘱𝘦𝘳𝘢𝘵𝘪𝘰𝘯𝘊()]);
𝘧𝘪𝘯𝘢𝘭 𝘢 = 𝘳𝘦𝘴𝘶𝘭𝘵𝘴[0] 𝘢𝘴 𝘛𝘺𝘱𝘦𝘈;
𝘧𝘪𝘯𝘢𝘭 𝘣 = 𝘳𝘦𝘴𝘶𝘭𝘵𝘴[1] 𝘢𝘴 𝘛𝘺𝘱𝘦𝘉;
𝘧𝘪𝘯𝘢𝘭 𝘤 = 𝘳𝘦𝘴𝘶𝘭𝘵𝘴[2] 𝘢𝘴 𝘛𝘺𝘱𝘦𝘊;

Today I learned a neat #Dart trick for running multiple async operations in parallel.

I used to rely on 𝗙𝘂𝘁𝘂𝗿𝗲.𝘄𝗮𝗶𝘁(), but that meant:
• Casting results manually (𝘢𝘴 𝘛𝘺𝘱𝘦𝘈, 𝘢𝘴 𝘛𝘺𝘱𝘦𝘉 … 😩)
• The logic depended on the order of operations (easy to break, especially with LLMs 😅).

u24.gov.ua - United 24
savelife.in.ua/en/ - Come back alive
prytulafoundation.org/en - Prytula Foundation
yellow-tape.com.ua/home-eng - Yellow Tape Foundation
koloua.com/en/ - KOLO

If you like the package, the best way to show your appreciation now is by supporting my country - Ukraine 🇺🇦If you can afford it, I encourage donations to well-established charity foundations (except for the Red Cross), here are a few:

bdd_widget_test | Dart package A BDD-style widget testing library. Generates Flutter widget tests from *.feature files.

Just updated bdd_widget_test!

⚠️ Heads up: This release includes a breaking change. I had to remove some functionality. If you miss it, please reach out!

📊 Mind-blowing: 61K+ downloads last week! Happy to see that so many of you find it useful.

Check it out: pub.dev/packages/bdd...

u24.gov.ua - United 24
savelife.in.ua/en/ - Come back alive prytulafoundation.org/en - Prytula Foundation
yellow-tape.com.ua/home-eng - Yellow Tape Foundation
koloua.com/en/ - KOLO

6/6

As usual, if you enjoy the talk, the best way to show your appreciation now is by supporting my country - Ukraine 🇺🇦If you can afford it, I encourage donations to well-established charity foundations (except for the Red Cross), here are a few:

5/6

Why Experts Struggle With Known Problems in Software Architecture How past experience holds you back

If you’re interested in more details, I just published an article on the topic:

olexale.medium.com/0a95cef1dd63

4/6

4/ When complexity grows, we add MORE complexity instead of simplifying the problem.

💡 The solution: Start small. Break big problems into small ones. Let your app guide you to what's actually needed.

3/6

2/ We build emotional attachments to past solutions. They become our default, and we get defensive when challenged.

3/ Context changes, but our solutions don't. A banking app ≠ calculator ≠ social network, yet we apply Clean Architecture universally.

2/6

Why Experts Struggle With Known Problems in Software Architecture How past experience holds you back

🧵 Just published an article on why solving NEW problems is easier than KNOWN ones (especially for experts): olexale.medium.com/0a95cef1dd63

TL;DR 👇
1/ We fall into the pattern-matching trap. Solved it before? Must use the same solution again.

1/6

u24.gov.ua - United 24
savelife.in.ua/en/ - Come back alive
prytulafoundation.org/en - Prytula Foundation
yellow-tape.com.ua/home-eng - Yellow Tape Foundation
koloua.com/en/ - KOLO

If you enjoy the talk, the best way to show your appreciation now is by supporting my country - Ukraine 🇺🇦If you can afford it, I encourage donations to well-established charity foundations (except for the Red Cross), here are a few:

In this talk, I cover:
✅ When on-device AI makes sense (and when it doesn’t)
✅ How to integrate AI models into your Flutter apps
✅ Live demos to kickstart your own AI-powered features
If you’re building #Flutter apps and thinking about #AI - this is for you.

YouTube video by Oleksandr Leushchenko "Integrating On-Device AI Models into Flutter Apps" talk by Oleksandr Leushchenko on FGS'25

🚀 Just published my "Integrating On-Device #AI Models into #Flutter Apps" talk from FGS!

In a world obsessed with LLMs and chatbots, it’s easy to forget the power of running AI locally - no servers, no latency, and better privacy.

www.youtube.com/watch?v=tRNr...

YouTube video by Talsec iOS Keychain vs Android Keystore

Podcast: iOS Keychain vs Android Keystore. Whether you’re building for Android, iOS, or both, you’ll get practical tips and clear explanations to help you choose the right approach for your next project.
www.youtube.com/watch?v=nB4h...

That reminded me of my childhood - my friends and I used to clone each other’s toys by making aluminum copies. Not because we didn’t have toys, but just because it was fun to create molds and pour in melted aluminum 🙂

MiniClient Flutter tutorial - YouTube Ever wondered how experienced developers structure their Flutter projects? In this hands-on tutorial series, we build a Flutter app from scratch, breaking do...

🚀The MiniClient series is complete!
Want more? I might stream about CI/CD, testing, or on-device AI.
Drop your ideas in the replies or YouTube comments!

🎤 Next stop: #FlutterGlobalSummit. Don’t miss it!

📺 Catch all 3 streams here: youtube.com/playlist?lis...

Live Coding: MiniClient Flutter Tutorial #3 🔴 Live Coding: MiniClient Tutorial #3 In this second part, I walk through the "navigation" and "testing" parts of the MiniClient tutorial — a hands-on introduction to how we build and scale large real...

It’s all about balance. Knowing when to try new things is just as important as what to try.

By the way, the final stream of the MiniClient tutorial is happening tomorrow. I hope you’ll learn something new you’ll want to try in your own experiments. Don’t miss it!

(4/4)
youtube.com/live/bHxqnyB...

But when I’m working on something production-critical or for a client, I rely on well-tested tools and familiar approaches. That’s not the time for experiments - that’s when reliability matters most.

(3/4)

When I’m experimenting or building a proof of concept, I intentionally change one or two things: a new dependency or a new architectural idea. Small changes keep things manageable and help me learn without derailing the project.

(2/4)

Live Coding: MiniClient Flutter Tutorial #3 🔴 Live Coding: MiniClient Tutorial #3 In this second part, I walk through the "navigation" and "testing" parts of the MiniClient tutorial — a hands-on introduction to how we build and scale large real...

After my first two streams, I’ve been asked a few times:
❓“Do you always structure your projects this way?”
❓“Do you always use the same dependencies?”

The short answer is no. Every project is a chance to learn, refine, and grow.

(1/4)
youtube.com/live/bHxqnyB...

YouTube video by Talsec How to Block Screenshots, Screen Recording, and Remote Access Tools in Android and iOS Apps

How to Block Screenshots, Screen Recording, and Remote Access Tools in Android and iOS Apps - watch our newest podcast featuring @olexale.bsky.social & @mhadaily.bsky.social

www.youtube.com/watch?v=ZHhs...

u24.gov.ua - United 24
savelife.in.ua/en/ - Come back alive
prytulafoundation.org/en - Prytula Foundation
yellow-tape.com.ua/home-eng - Yellow Tape Foundation
koloua.com/en/ - KOLO

If you enjoy the streams, the best way to show your appreciation now is by supporting my country - Ukraine 🇺🇦If you can afford it, I encourage donations to well-established charity foundations (except for the Red Cross), here are a few:

Live Coding: MiniClient Flutter Tutorial #3 🔴 Live Coding: MiniClient Tutorial #3 In this second part, I walk through the "navigation" and "testing" parts of the MiniClient tutorial — a hands-on introduction to how we build and scale large real...

🚨 Final MiniClient stream – 📅 May 20 🕓 4 PM UTC

We covered utility, feature & application layers. Now it's time for:
🧭 Navigation
🧪 Testing

Wrapping up this comprehensive guide to building complex Flutter apps
www.youtube.com/live/bHxqnyB...