How Nubank scales its mobile development with Flutter
Original post Scaling Nubank’s mobile development with Flutter
Article Summary
Nubank went all-in on Flutter for Latin America's largest digital bank. A year later, their Director of Engineering Alexandre Freire shares the real numbers on what happened.
Nubank evaluated cross-platform frameworks against 5 strict criteria (developer experience, long-term viability, platform parity, abstraction cost, and risk) before standardizing on Flutter. This retrospective reveals how the decision played out across their hyper-growth phase, supporting multiple products across Brazil, Mexico, and Colombia.
Key Takeaways
- Flutter PRs merge in 9.9 minutes vs 70.45 minutes overall (30% better success rate)
- New engineers contribute to production within days of onboarding
- Life Insurance product launched in 3 months (previously took a year)
- Migration only 50% complete after a year (harder than expected)
- Built custom Flutter Desktop tooling to skip emulators and save battery
Flutter delivered dramatic velocity gains for Nubank, but migrating a complex multi-product app proved more challenging than anticipated, requiring significant platform team investment.
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This page summarizes “Scaling Nubank’s mobile development with Flutter” by Nubank, published Feb 10, 2021. All credit for the original work goes to the authors.
