Uploaded November 2025 | Updated September 2026, 9 hours ago

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Zalando engineers and Callstack share the full story behind one of the largest React Native brownfield migrations to date. Learn how Zalando added React Native into a decade-old mobile architecture, proving the business case for cross-platform at scale.

This webinar covers:
➡️ How the team built consensus across native and web teams
➡️ The architecture patterns that kept development modular and safe
➡️ What KPIs proved React Native’s long-term value.

Watch the full session for real lessons on migration strategy, performance validation, and future plans for React Native at Zalando.

Chapters
00:00 Welcome and Introductions
00:42 Overview of today's topic: Zalando migration
01:09 Meet the team: Callstack and Zalando
03:43 Agenda and motivation for cross-platform
07:36 Choosing React Native: Benefits and considerations
12:19 Technical challenges and solutions
24:53 Migration strategy and implementation
37:13 Internal beta testing and AB tests
38:32 Platform-specific rollouts
39:31 Technical deep dive: Architecture and challenges
41:50 Building React Native as a library
45:51 Dependency injection and communication layers
51:33 Cross-platform UI and styling
58:21 React Native integration and future plans
01:10:00 Community contributions and closing remarks

Full post-webinar notes available at clstk.com/4pecGCB
Integrate React Native with your native application with Callstack’s help 🙌  clstk.com/4nSwoCu
Check out more brownfield content from Callstack 📚 clstk.com/3WXbsPU