
Same Destination, Different Roads: Migrating a Live App at Scale

AI is making large app migrations more feasible, but moving a live product involves much more than rewriting code. Teams also need to preserve the behavior users rely on while keeping analytics, releases, and ongoing feature work intact.
Using an anonymized case study, Łukasz compares Greenfield and Brownfield approaches to modernizing a production app. React Native provides the concrete example, while the decisions apply more broadly: how to balance continuity, observability, delivery speed, organizational constraints, cost, and risk.
The talk covers Brownfield architecture, data from the project, and how proofs of concept and production reference screens helped validate the approach. Attendees will leave with a way to assess which migration path fits their own app.
We support teams building scalable apps with React and React Native.
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Execute complex migrations fast and with confidence.
Send us the current stack and where you want to land. We'll come back with the migration path and the timeline.
- Move off legacy faster
- Choose the right migration path
- Reduce migration risk
- Build faster after migration
Migration to React Native
Migration to Self-Hosted Infrastructure
Migration to Modular Architecture
Migration to Expo
Migration to Next.js
Migration to New Architecture
React Native Upgrades
UX Modernization
Tech Debt Reduction





















