Migration to Flutter Guide
Discover our battle-tested 21-step framework for a smooth and successful migration to Flutter!

Partner with Europe’s leading Flutter team

Deloitte Technology Fast 50 award
Clutch 100 Fastest Growth award
Top Flutter Developers 2025 (Clutch)
Forbes Diamond 2024 award
Gazele Biznesu 2023 award
LeanCode's Flutter development team
Credit Agricole logo
Sennheiser logo
Millennium logo
Viessmann logo
Virgin Money logo
NOS logo

Our custom Flutter solutions for your business

We're more than just developers; we're strategic partners, offering comprehensive services from initial strategy to flawless execution, tailored to your unique needs. We empower you with:
Flutter mobile app development
Flutter web app development
Flutter desktop app development
AI-assisted development
Flutter team training
Flutter architecture workshops
Flutter consulting
Flutter app audit

60+
Flutter apps delivered
30+
Flutter experts on board
2
Google Developers Experts
9
years in the business

Why build your Flutter app with LeanCode?

1
Flutter is our core technology

Over the past few years, we’ve delivered medium and large-scale Flutter apps to a wide range of clients, proving that Flutter is the backbone of our expertise.

2
We’re an official Flutter consultancy firm

We’re proud to be recognized as one of the top global Flutter companies listed on the official Flutter.dev page, demonstrating our track record of exceptional results.

3
We have 2 GDEs in Dart & Flutter on board

As one of the few Flutter agencies worldwide, we proudly have two Google Developer Experts (GDEs) for Dart and Flutter on our team: Mateusz Wojtczak and Albert Wolszon.

4
We build Flutter enterprise apps

With proven experience from large-scale projects (200+ people), we offer a service that is both tested and reliable, ensuring your app is built to the highest standards.

5
We take care of the entire development process

From product strategy sessions to UX/UI design, QA testing, launch management, and ongoing maintenance—we handle everything, ensuring a seamless experience.

6
We develop apps faster with AI-assisted solutions

By integrating AI-powered tools throughout the development cycle, we accelerate time-to-market and reduce costs, giving you a competitive edge.

7
We create our own Flutter packages

We’re the authors of numerous open-source Flutter and Dart packages, which we actively maintain, such as Patrol—a UI testing framework for Flutter applications.

8
We actively support the Flutter community

We organize numerous Flutter events, including Flutter Warsaw meetups (20 editions, 2,000+ members) and Flutter Europe, the world's largest Flutter conference.

Meet our top Flutter experts

Mateusz Wojtczak, Head of Mobile at LeanCode
Mateusz Wojtczak
LeanCode
Head of Mobile at LeanCode; Flutter and Dart GDE; Tech Leader for the Credit Agricole Mobile Banking application in Flutter; Tech Owner for Patrol, UI Automation tool for Flutter
Jakub Fijałkowski, Head of Backend at LeanCode
Jakub Fijałkowski
LeanCode
Head of Backend at LeanCode; Security Expert; DevOps Expert; Head of the Infrastructure, DevOps and Support Team at LeanCode.
Marcin Chudy - Senior Frontend and Flutter Developer at LeanCode
Marcin Chudy
LeanCode
Engineering Manager on the LeanCode Flutter Team; Flutter Tech Lead for the Millennium Bank mobile banking app; Speaker at international tech conferences.

Our proven Flutter app development process

Credit Agricole Bank Polska logo
Industry
Banking
Headcount
5 000+

Building one of the biggest Flutter applications in the world

Credit Agricole Bank Polska decided to become one of the leaders in digital banking. Their new application, CA24 Mobile, offers a customer experience and user interface which are unique on the Polish market. They used Flutter technology to gain a competitive advantage.

Building one of the biggest Flutter applications in the world

Credit Agricole Bank Polska decided to become one of the leaders in digital banking. Their new application, CA24 Mobile, offers a customer experience and user interface which are unique on the Polish market. They used Flutter technology to gain a competitive advantage.
200+
Members worked for a year on the project
200+
Members worked for a year on the project
30
Flutter Developers working to build a next-generation mobile banking app
30
Flutter Developers working to build a next-generation mobile banking app
12
months to deliver a modern mobile app
12
months to deliver a modern mobile app

Client feedback that says it all

We partnered with LeanCode to assist in the migration of our mobile application from React Native to Flutter. [...] The LeanCode team demonstrated their expertise in Flutter and their ability to integrate seamlessly with our team, adding value both in development and team empowerment.

Igor Kova
Igor KovaChief Technology OfficerAvy AB
5.0
Reviewed onClutch

We partnered with LeanCode to assist in the migration of our mobile application from React Native to Flutter. [...] The LeanCode team demonstrated their expertise in Flutter and their ability to integrate seamlessly with our team, adding value both in development and team empowerment.

Igor Kova
Igor KovaChief Technology OfficerAvy AB
5.0
Reviewed onClutch
Credit Agricole logo

LeanCode has delivered the MVP within 2.5 months, exceeding our expectations. Agile and detail-oriented, they've taken the time to understand the banking industry to deliver the most effective solution for our users. They are professional, efficient, and responsive.

Tomasz Czerwiński
Tomasz CzerwińskiDeputy CIOCredit Agricole Bank Polska
5.0
Reviewed onClutch
Credit Agricole logo

LeanCode has delivered the MVP within 2.5 months, exceeding our expectations. Agile and detail-oriented, they've taken the time to understand the banking industry to deliver the most effective solution for our users. They are professional, efficient, and responsive.

Tomasz Czerwiński
Tomasz CzerwińskiDeputy CIOCredit Agricole Bank Polska
5.0
Reviewed onClutch
Activy logo

If you decide to work with LeanCode, you will experience a lot more than a usual relationship between a client and a vendor. They have empathy combined with responsibility, and they are really lean - both for small and big clients.

Igor Pielas the CEO at Activy
Igor PielasCEOActivy
5.0
Reviewed onClutch
Activy logo

If you decide to work with LeanCode, you will experience a lot more than a usual relationship between a client and a vendor. They have empathy combined with responsibility, and they are really lean - both for small and big clients.

Igor Pielas the CEO at Activy
Igor PielasCEOActivy
5.0
Reviewed onClutch
Meet our expert

Let’s talk about your plans for using Flutter

Łukasz Kosman / CEO at LeanCode
Łukasz Kosman, CEO LeanCode
Hi,

During our first interview, we will discuss your business needs and plan how we can take your Flutter-related efforts to the next level.

Łukasz KosmanCEO at LeanCode