Flutter Tech Summit 2025 by LeanCode: Mastering Enterprise Migration to Flutter

In recent years, Flutter has moved from an emerging framework to a strategic choice for enterprises. Yet while the ecosystem is full of meetups and developer conferences, one crucial perspective has been missing: how Flutter performs at scale - across complex organizations, legacy systems, and long-term product strategies.

That’s exactly the gap Flutter Tech Summit was created to fill.

In this article, we share exclusive insights that came from bringing together 60+ senior leaders from global organizations, including Virgin Money, Tide, NOS, Viessmann Climate Solutions, Sonova, and Google.

Sign up for the second edition of the only Flutter event for mobile executives:

What is Flutter Tech Summit?

Flutter Tech Summit is the only tech event for mobile executives.

Organized by LeanCode, a leading Flutter development company for enterprises and scale-ups, the Flutter Tech Summit wasn’t another developer conference. It was a closed-door tech event for decision-makers - mobile executives, engineering leaders, and architects - who are shaping the future of their digital products.

What made it different? No generic talks. No surface-level hype but experience-driven case studies about migrating to Flutter - what works, what breaks, and what it really takes to make it succeed in production. The first edition, held in Warsaw, was built around one of the most complex and business-critical challenges: migration.

But the conversation didn’t stop there. Throughout the day, participants explored Flutter from multiple strategic angles - from the role of AI in modern product development in “What Makes AI Work? The LeanAI Experiment”, through a critical look at enterprise adoption in “Is Flutter Enterprise-Ready in 2025?”, to an open, live debate on the biggest challenges teams face when scaling Flutter.

The agenda was complemented by an exclusive Fireside Chat on the future of Flutter with a representative of Google’s Flutter team - followed by a live Q&A - and a series of roundtable discussions led by roundtable moderators from companies such as Widgetbook, Kearney, Serverpod, WidgetsAcademy, Tide, where leaders could step away from presentations and engage in candid, peer-to-peer exchange.

Flutter Tech Summit 2005 - why migration to Flutter became the core topic

In enterprise reality, migration is never just about technology. It’s a strategic shift that impacts teams, processes, budgets, and long-term product direction. Entire mobile organizations don’t switch overnight - they evolve, often gradually, toward a new architecture. And those decisions don’t sit with developers alone. They are driven at the highest level - by CIOs, CTOs, and boards who must balance innovation with risk.

Yet despite Flutter’s growing adoption, enterprise leaders are still navigating this journey without a clear playbook. There is no widely available, structured knowledge base. No proven implementation standards. No shared space where executives can openly exchange lessons learned.

That’s why we created two initiatives designed to make Flutter migration tangible, repeatable, and grounded in reality:

1. Flutter Tech Summit - a space where mobile executives and engineering leaders openly exchange what actually works (and what doesn’t) when migrating to Flutter
2. Migration to Flutter Guide - a collection of migration journeys from companies that have already done it successfully, including Virgin Money, Credit Agricole Bank Polska, Sonova, NOS, and eBay, along with a 21-step migration map to make it easier.

Flutter Tech Summit - Sonova’s Migration Journey to Flutter

What do you do when your app – the one used by hundreds of thousands of customers monthly – starts holding you back instead of driving growth? 

That’s the challenge Sonova, the global leader in hearing technology behind the Sennheiser consumer brand, faced with its Smart Control app. Their app was used by nearly 650K monthly active users and supported 28 different audio products. But it was built in Native Script, a framework that had reached its limits.

• Performance issues were showing up in app store reviews
• Every new feature meant costly rework
• The ecosystem could no longer keep up

So Sonova made a bold move: migrate to Flutter. Their story, shared by Eduard Siewert, Senior Software Architect, shows that migration isn’t just about moving frameworks – it’s about reimagining your app from the ground up.

Watch Sonova’s Case Study - Lessons Learned From Rewriting an App With Flutter

Flutter Tech Summit - Virgin Money’s Migration Journey to Flutter

How did Virgin Money - a leading UK bank with 6M+ retail users in a highly regulated environment - manage to migrate 12 separate mobile apps into one without slowing down innovation? Their answer was a Hybrid Migration Strategy. 

As Simon Burgon, Mobile Chapter Lead at Virgin Money, shared, they started with an Add-to-App approach, building new features in Flutter while keeping existing native code alive. This way, they could evolve their mobile banking experience step by step, keeping pace with the rapidly changing financial landscape. Their story shows that migration doesn’t have to mean disruption – especially at enterprise scale.

What’s more, when they were considering Flutter, they asked themselves what would stop them from adopting Flutter? They tested it from different angles and couldn’t find anything. So the decision was clear. Today, Flutter is powering everything from startups to enterprise-grade banking apps. The question isn’t if you should migrate - it’s how.

Watch Virgin Money’s Case Study - What Did the Decision-Making Process for Adopting Flutter Look Like in Virgin Money?

Flutter Tech Summit - NOS’ Migration Journey to Flutter

NOS has been a powerhouse in innovation, telecom, and media for 12 years.NOS offers a single streaming app – NOSTV. This product spans 11 different platforms: 4 mobile OSs, 6 big screen OSes, and 1 for their set-top box (STB). This means managing, maintaining, and keeping 11 separate codebases in sync. They knew that moving to Flutter was essential for the future.

But what to do when you have an app on a different tech stack and an in-house team that works with different technology? What options are out there for such teams?

There is a way, the one positive for everybody on board - upskilling your developers, and that is what NOS did. Fernando Oliveira, Head of Technology at NOS, recommends Flutter Training organized by a trusted tech partner. You can equip your dev teams with the skills, tools, and architectural know-how to confidently build and maintain Flutter apps. Result? Now, their web devs can build mobile apps, and their mobile devs can build web apps.

Watch NOS’ Case Study - How to Effectively Train a New Flutter Team

Flutter Tech Summit - proving Flutter is enterprise-ready

A Flutter migration isn’t only a technical discussion - it’s also a leadership decision. 

Even when engineering teams are fully aligned and excited about Flutter, the real challenge often begins at the executive level. Stakeholders, from product leaders to board members, ask the questions that ultimately determine whether migration happens or not: Can Flutter be trusted at scale? Is it a safe long-term investment? What are the risks? And will it actually improve how we build and deliver products?

That’s why there was also a talk dedicated to this topic. In “Is Flutter Enterprise-Ready in 2025?”, Łukasz Kosman, CEO of LeanCode, broke down the reality behind Flutter adoption in large organizations - drawing from real enterprise implementations, production use cases, and years of experience working with companies navigating this exact transition.

Flutter Tech Summit - Fireside Chat on the future of Flutter

During the Flutter Tech Summit 2025, we hosted Ander Dobo, Product Lead at Google’s Flutter Team. 

Ander was the special guest of a Fireside Chat with our CEO, Łukasz Kosman, where he provided participants with a broader perspective on the future of Flutter – but from the perspective of the companies that rely on it every day – and what’s coming next for the framework.

• What can companies building with Flutter expect from Google’s support?
• Which parts of the Flutter roadmap are a part of the long-term vision?
• And why does community and company feedback play such a big role?

It was a rare opportunity for mobile executives to ask their own questions directly to the Flutter team and get insights straight from the source. Another valuable aspect of this was a live Q&A session, where attendees could ask their questions directly to a person at the forefront of Flutter’s development.

Watch Fireside Chat with Ander Dobo

Flutter Tech Summit - what’s next in 2026?

At the last edition of Flutter Tech Summit, over 60 engineering leaders from global enterprises came together to talk about Flutter - not in theory, but through real migrations and real challenges faced inside large organizations. But while those conversations focused on mastering Flutter at scale, the next wave of transformation is already here.

At Flutter Tech Summit 2026, the spotlight shifts to what’s now keeping every engineering leader up at night: AI transformation. Because the reality is hard to ignore, most enterprise teams are still planning their AI transformation while their competitors are already shipping with it.

This edition is designed to close that gap. Topics that we will cover:

• AI Transformation in software development - real case studies, not theory 
• AI Ready Design Systems - the foundation that makes AI-assisted development scalable
• AI-driven QA automation - the guardrails that make it safe to ship faster

Because just like with Flutter adoption, the winners won’t be the ones who talk about AI the most - but the ones who learn how to apply it, responsibly and effectively, at scale.

Sign up for the second edition of the only Flutter event for mobile executives: