@LeanCodePl
Account based inPoland
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We're a custom software studio that delivers end-to-end solutions for various industries. Experts in #Flutter #DotNet #React and a part of #FlutterCommunity.
Warsaw, Poland
Joined August 2019
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- Followers2.1K
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While getting ready for the next edition of #FlutterTechSummit, we needed to check:
How long would it take to get our FTS Flutter app ready for iPhone Duo? π
Turns out: only 1 day. β¨
#FlutterDev #iPhoneDuo
What if every mobile release could be an experiment-not a gamble? π
At Nubank, feature flags help teams separate deployment from release, test ideas safely, and make rollout decisions based on real-world data.π
Rafael Lisboa shares how they do it with Flutter.
π₯youtube.com/watch?v=kqm0AOdcβ¦
#FlutterDev #FeatureFlag #FlutterTechSummit
Patrol has 600K downloads a month! π€―
We started building this #opensource framework for agentic #E2Etesting for Flutter back in 2022 - and watching more and more Devs and QAs trust and use it every month means a lot to us.
Thank you to everyone using Patrol, contributing, sharing it, and spreading the word. π
Flutter was missing from the SAP ecosystem. Not anymore! π
Watch @Fiolek_'s talk about this solution: π₯ youtube.com/watch?v=8ajQkfLhβ¦
SAP powers the core processes of many enterprises, but its standard workflows rarely fit exactly how teams work. Custom apps can adapt #SAP to specific business needs, yet building them has traditionally been slow and complex. We bring SAP integration to Flutter. π
#FlutterDev #EnterpriseSoftware
LeanCode π retweeted
I ran @LeanCodePl Marionette with @typesafeai Jev.
One sentence: "win the game."
A Flutter game it had never seen. 5 puzzles, rules only on screen. It read the code, flipped the right switches, tapped blue, red, green. π€―
9.7 s. $0.0012. β‘
No LLM involved.
Marionette reads the widget tree and taps, Jev decides π§΅
9,000+ km to give a Flutter talk! βοΈπ Our Senior Flutter Dev, @PRogulskiDev, is heading all the way to CancΓΊn, Mexico, to take the stage at @FlutterConfLAT!
His talk, βStop Being a Human Linter: Automating Flutter Architecture at Scale,β tackles a challenge every growing engineering team eventually hits: architecture guidelines shouldnβt live only in Confluence or rely on reviewers to catch every violation.
π Flutter Conf LATAM - CancΓΊn, Mexico
ποΈ September 22-23
ποΈ flutterconflatam.dev
#FlutterConfLATAM #FCL2026 #FlutterDev
Using Patrol? Thereβs a good chance you are, since it has 600K monthly downloads π€―. But do you know all its capabilities?
Or maybe youβve only heard about it? Then itβs never too late to start.
Thereβs an article about @patrol_leancode, including extra powers like test sharding, how to get better at using Patrol MCP, and more. π
Worth checking out π
leancode.co/blog/everything-β¦
#FlutterDev #E2ETesting #FlutterTesting
LeanCode π retweeted
Hey, your conditional form sections don't have to be a mess :) advanced_forms lets you attach and detach subforms in one call, and the tree π³ nature of the form state means no more ifs in your validators.
#FlutterDev
The Challenge: building reliable E2E tests for an app that depends on connected devices. π±
Eduard Siewert (Sonova) & @oskar_lncd (LeanCode) show how Sonova improved test coverage and shortened release cycles with hardware simulation and AI-generated tests π€.
See how Patrol MCP lets AI agents inspect the UI and write tests efficiently.
βΆοΈ Watch the talk: youtube.com/watch?v=5g66yqOFβ¦
#FlutterDev #FlutterTechSummit #E2ETesting @patrol_leancode
LeanCode π retweeted
Your Product Owner's "small fix" π the day before the client demo: switch form validation from "on submit" to "on unfocus." With @LeanCodePl's advanced_forms that's one line of code :)
#FlutterDev
LeanCode π retweeted
Look how little code & effort it took to create a sign in form with validation using advanced_forms πͺ Under a minute of work
We built advanced_forms for the big painful forms, but it's great for the small ones too π advanced-forms.leancode.co
Our team is back from @FlutterNFriends and, wellβ¦ they were pretty busy there, thanks to you - if you attended. ππ
Flitz demos, 3 talks (delivered by @matiwojt, @albert_wolszon, Artur, @Fiolek_ ) & a Flutter E2E workshop with Marionette + Patrol MCP (by @oskar_lncd) & lots of great conversations.
Btw. Oskar said that seeing around half the room already actively using @patrol_leancode made the workshop particularly fun.
Our team also came back inspired: @schultek_dev & @parlough - Jaspr got some of us coding right away π
, and @algebrandonβs GPU demo had the whole room silent. π
It really felt like Flutter AND Friends: technical, social, funny & full of people excited to build cool things.
Thanks to everyone who stopped by! π
One feature request for next year: bring back Code in the Dark. π
#FlutterDev #FlutterNFriends26
Have you tried our #opensource package advanced_forms?
Our team member @ksztandur is taking great care of it - and just released v0.2.1! π
There's also a brand-new page with everything you need to get started and see what advanced_forms can do.
#FlutterDev give it a try π
I didn't want to make you read a wall of README without seeing what the package is capable of. So advanced_forms just got a new homeΒ π advanced-forms.leancode.co/ π
Every example on the landing page is a real Flutter form with its code right next to it, running in your browser and powered by Jaspr (thanks @schultek_dev for that brilliant talk at @FlutterNFriends π).
By creating this website I wanted you to feel the difference by interacting with these live Flutter forms instead of just reading about them πͺ
I also expanded the docs with more valuable info π A proper website let me sneak in the stuff that would normally bloat the README and make it indigestible. Plus, you're getting interactive examplesΒ :) Go on and try it!
π 24 Flutter & Dart Hacks. How many do you know? Check them all π leancode.co/blog/flutter-codβ¦
Weβve collected practical patterns from our daily work at LeanCode to help you write less boilerplate, keep your code cleaner, and catch mistakes earlier.
Special thanks to @ksztandur and Agnieszka Forajter for collaborating on the #LeanFlutterHacks series. π
#FlutterDev #CleanCode
π€ Made with AI
Our team will be showing you some cool stuff at our booth at Flutter & Friends π€
@LeanCodePl and I are on @FlutterNFriends 2026!
Come talk to us on our booth and hit me up about advanced_forms!
SPOJLER - I just leaked the official AF logo π
There's a new version of this post
LeanCode at @FlutterNFriendsπ©΅
If youβre joining this conference on September 4β5, we have a little cheat sheet to help you catch our team on stage.
Topics? Flutter Engine internals. Accessibility at scale. AI agents. E2E testing.
Save the thread π§΅π
Full agenda: flutterfriends.dev/schedule/
3/n π€ 16:20 - Closing the Loop: Autonomous Agents in Flutter with Marionette MCP by @matiwojt
What if your AI agent could actually use the Flutter app it just built? Tap. Type. Scroll. Inspect. Debug. Hot reload. Find its own bugs. Fix them. Verify the result. Thatβs Marionette MCP.
4/4 π§ͺ 5th Sept.: 13:00 - Hands-On: Writing Flutter E2E Tests with AI and Patrol by @oskar_lncd
Stop asking AI to write E2E tests blind. Connect your AI agent to Patrol and Patrol MCP, then make it explore, write, run, debug, and fix real Flutter E2E tests with you in the driverβs seat.
