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LeanCode

Name: LeanCode
Address: Wróbla 8a, Warsaw, 02-736, PL
Telephone: 605100922

We build products for corporations and startups worldwide whose mission is to solve real-life problems using cutting-edge technologies.

Our team consists of 70+ people divided into teams specializing in Flutter, React, .NET.

20/08/2026

📢 A Design System might be easy to start. Building one that still works when your Flutter app, product, and team scale? That’s the hard part.

That’s exactly what we unpack in our free webinar: “How to Build a Design System for a Scalable Flutter App”.

Our Flutter experts, Albert Wolszon and Tomasz Koter, walk you through the lessons and practices we use to build Design Systems - and show you how to turn them into a shared language between design and development, rather than another source of friction. 💡

🎥 Watch it on your own time - the webinar is available on demand.
👉🏻 Sign up to get access: https://leancode.co/webinar/design-system-in-flutter-apps

11/08/2026

🔐 One stolen password shouldn’t be enough to take over an account.

That’s the idea behind Two-Factor Authentication: even when one authentication factor is compromised, there’s another line of defense.

That’s why 2FA matters. But implementing it well raises questions:
❓ SMS, authenticator app, push, or biometrics?
❓ What if a user loses their device?
❓ Security vs. smooth UX?
❓ Build it yourself or use a ready-made solution?

Whether you’re a or building a new product, we break down the options, trade-offs & implementation approaches. 👇
https://leancode.co/blog/app-security-with-two-factor-authentication?utm_source=facebook&utm_medium=social&utm_campaign=MAT

03/08/2026

Every forgotten password costs you users. Every password reset costs time. Every phishing attack costs trust.

That's why the biggest tech companies are moving toward Passkeys. Just Face ID, Touch ID, or a device PIN. ✅

If you're building a new product – or modernizing an existing one – Passkeys are worth exploring now, not later. We wrote about it: 👉 https://leancode.co/blog/passkeys-explained-how-passwordless-authentication-works?utm_source=facebook&utm_medium=social&utm_campaign=MAT

28/07/2026

Your app can lose users before they ever experience it. Not because of missing features. But because sign-up is too long, login is frustrating, or password recovery is painful.

Authentication isn't just about security – it's about conversion, retention, and trust. ✨

Whether you're building a Flutter app or launching a new product, getting these flows right pays off from day one.

Read more 👇
https://leancode.co/blog/authentication-and-registration-best-practices?utm_source=facebook&utm_medium=social&utm_campaign=MAT

22/07/2026

Is Flutter suitable for regulated industries? The short answer is yes ✅- but not for the reason many people think.

From a compliance perspective, Flutter itself doesn't determine whether an application meets regulatory requirements. Compliance depends on how your application is designed, implemented, and maintained.

The bigger challenge is often getting a new framework approved.
In regulated industries, technology decisions involve much more than engineering.

Before a framework reaches production, it may need to pass:
🔒 Security reviews
📋 Risk assessments
🛒 Procurement processes
✅ Compliance approval

Want to learn what each stage involves and how organizations evaluate new technologies? 👉 https://leancode.co/blog/choosing-development-tools-for-regulated-industries

16/07/2026

Who is going to flutterCon USA in Orlando? 🛬 As always, our team is wherever people are talking about Flutter and the future of app development.

If you're attending, it's a great opportunity to chat 💬 with Łukasz Kosman, Kuba Wojtczak, Mateusz Wojtczak, Sebastian Konowrocki, and Robert Odrowąż-Sypniewski (the last two are also conference speakers 😎).

Have fun, in the US!

08/07/2026

We’ve been waiting to share this exciting news: We’ve had the privilege to work directly with the Flutter team from Google! 🎉🚀

From the very beginning, we’ve been all-in on Flutter. 💙 Not just building apps, but pushing the ecosystem forward: sharing knowledge with teams worldwide, delivering large-scale Flutter projects, contributing to open-source (Patrol, Marionette, and others), organizing and supporting Flutter events.

Step by step, that journey led us to becoming an official Flutter consultancy. And now? We’re taking it further. Working directly with the Flutter team means we’re not just using the framework - we’re actively shaping its future alongside the people behind it. ✨

And on top of that, receiving such kind words from Abdallah Shaban and the team at Flutter.dev truly means a lot. Thank you 🙌

06/07/2026

From "What is it?" to "How do I use it?" - everything about Marionette MCP.

Maybe you've heard about Marionette MCP but haven't had a chance to try it yet. Or looking for a resource to share with your team, we've brought all of those answers together - from how it works and how to integrate it into your Flutter app to how it compares with Flutter MCP. 🔍

More about Marionette MCP: ✨ https://leancode.co/blog/marionette-mcp-in-flutter-apps

30/06/2026

⚡ New Release: marionette_mcp v0.6 is here! ⚡

We've just shipped a new update that gives AI agents finer-grained control over your Flutter app under test.

What's new in v0.6?
🔄 Hot restart: restart the app from main() and reset all state.
⌨️ Real key events: simulate hardware keyboard input for forms, focus, and shortcuts.
🖱️ Secondary tap: trigger desktop right-click context menus.
🔧 Custom MCP tools: automatically expose typed extensions as discoverable tools.
🔎 Better accessibility: richer semantics make custom UI readable by AI agents.
✨ More improvements: swipe CLI, stability fixes, and better process cleanup.

Try it out and let us know what you think!

Check out the changelog here: https://pub.dev/packages/marionette_flutter/changelog

25/06/2026

Flutter & Friends is one of those events we always look forward to - not just for the talks, but for the people, conversations, and the amazing community around Flutter. 💙

This year, you might catch us:
👀 taking another shot at the legendary Code in the Dark challenge,
🎤 on stage sharing our experience,
🤝 at the LeanCode booth, where we might have some new things.

We're proud to support events like Flutter & Friends that bring together technical excellence, knowledge sharing, and a lot of fun.

Adres

Wróbla 8a
Warsaw
02-736

Godziny Otwarcia

Poniedziałek	08:00 - 18:00
Wtorek	08:00 - 18:00
Środa	08:00 - 18:00
Czwartek	08:00 - 18:00
Piątek	08:00 - 18:00

Telefon

605100922

Strona Internetowa

https://leancode.co/

Ostrzeżenia

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