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

Top Flutter development agency for enterprise and scale-ups

Deloitte Technology Fast 50 award
Clutch 100 Fastest Growth award
Top Flutter Developers 2025 (Clutch)
Forbes Diamond 2024 award
Gazele Biznesu 2023 award
LeanCode Design Thinking Workshops
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Technology logo
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Credit Agricole logo
Millennium logo
Shell logo
Sennheiser logo
Enterprise Switzerland logo
Virgin Money logo
Maspex logo
NOS logo

We cover the entire product journey

Why companies choose LeanCode

1
World-class Flutter experts

Poland is home to some of the world’s best engineers, and our Flutter team represents the very best of them.

2
True problem solvers

We go beyond code to understand and solve real business challenges, helping the product move forward and scale effectively.

3
Enterprise-level consultants

We bring vast experience managing complex IT systems for large enterprises, ensuring they meet rigorous standards of reliability, scalability, and security.

80+
experts on board
30+
dedicated Flutter devs
100+
digital products delivered
5.0
rating on Clutch

Tangible results delivered for our clients

Credit Agricole Bank Polska logo

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

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
NOS logo

Working with LeanCode has been an exceptional experience. Their project management is highly professional, with clear communication and well-organized processes ensuring smooth collaboration. They consistently delivered items on time and demonstrated a strong commitment to meeting our needs, promptly addressing any challenges or adjustments required.

Fernando Oliveira
Fernando OliveiraHead of TechnologyNOS
5.0
Reviewed onClutch
NOS logo

Working with LeanCode has been an exceptional experience. Their project management is highly professional, with clear communication and well-organized processes ensuring smooth collaboration. They consistently delivered items on time and demonstrated a strong commitment to meeting our needs, promptly addressing any challenges or adjustments required.

Fernando Oliveira
Fernando OliveiraHead of TechnologyNOS
5.0
Reviewed onClutch
Welliba logo

Solid knowledge and trusting cooperation help us deliver new features to our customers quickly, continuously, and based on high-security standards. The sophisticated code base and experience within LeanCode provided us with a strong foundation for the IT security certification process. We are thrilled and grateful to have found LeanCode as a partner and look forward to our further cooperation.

Mario Martella
Mario MartellaManaging Director & CTOWelliba
5.0
Reviewed onClutch
Welliba logo

Solid knowledge and trusting cooperation help us deliver new features to our customers quickly, continuously, and based on high-security standards. The sophisticated code base and experience within LeanCode provided us with a strong foundation for the IT security certification process. We are thrilled and grateful to have found LeanCode as a partner and look forward to our further cooperation.

Mario Martella
Mario MartellaManaging Director & CTOWelliba
5.0
Reviewed onClutch

Explore our expert insights to build better software

Migration to Flutter ebook mockup

Migration to Flutter

Migration to Flutter ebook mockup

Migration to Flutter

A 21-step roadmap covering the entire Flutter migration process, from initial assessment to project rollout, with proven migration strategies and success stories from global enterprises.
Flutter CTO Report 2024

Flutter CTO Report 2024

Flutter CTO Report 2024

Flutter CTO Report 2024

A comprehensive summary of insights and opinions on Flutter from CTOs, CIOs and Tech Leads, based on their experience with various Flutter projects.
Ebook Enterprise

Flutter for Enterprise

Ebook Enterprise

Flutter for Enterprise

Based on the experience from large-scale projects with more than 20 Flutter Devs, we summarized best practices for building enterprise applications in Flutter.
Meet our expert

Let’s talk about your big vision!

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

My name is Łukasz, and I will guide you through the product development process. During our first interview, we will discuss your needs and estimate the budget and timeline for the project.

Łukasz KosmanCEO at LeanCode