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$
USD
I will build a production ready flutter app for android and ios
Julián Usma
About this gig
Looking for a Flutter developer who delivers scalable, maintainable, and production-ready apps not just working prototypes?
I'm a Senior Flutter Developer with 6+ years of experience building cross-platform mobile apps used by real users across Latin America and the US.
Unlike most Flutter freelancers, I work with Clean Architecture, BLoC/Cubit state management, and SOLID principles from day one so your codebase stays maintainable as it grows.
What I've delivered in real projects:
35% improvement in app load time (MÜUD, Chile)
40% reduction in production bugs via unit testing
28% increase in user retention (NOHOL, Mexico)
Full cross-platform app delivered in 4 months (JAWA)
What you'll get:
- Flutter app for Android & iOS from a single codebase
- Clean Architecture + BLoC state management
- REST API integration (JSON/XML) using Dio
- Unit testing with Mockito
- Firebase, RevenueCat, SQLite integration
- Native integration (Kotlin/Android, Swift/iOS) when needed
- CI/CD pipeline with GitHub Actions
- App Store & Play Store deployment ready
Tech stack:
Flutter · Dart · BLoC/Cubit · Clean Architecture ·
GetIt · GoRouter · Dio · Firebase · RevenueCat ·
SQLite · GitHub Act
Get to know Julián Usma
Julián Usma
Senior Flutter Developer, Clean Architecture, BLoC, iOS and Android
- FromColombia
- Member sinceMar 2024
Languages
Spanish
I'm Julián, a Senior Flutter Developer based in Colombia with 6+ years building mobile apps for startups and companies across the Americas.
I specialize in Clean Architecture, BLoC state management, and production-grade Flutter development. I've worked remotely with teams in Chile, Ecuador, México, and the US — so I know how to communicate clearly and deliver on time.
If you want an app built to last, not just to demo — let's talk.
My Portfolio
FAQ
Do you publish the app to the stores?
Yes, on the Premium package. I handle both Google Play Store and Apple App Store submissions.
What do you need to get started?
A description of your app idea and main features, design references or Figma files if available, and backend or API documentation if applicable.
Can you work with an existing Flutter codebase?
Yes. I can continue, refactor, or migrate existing Flutter projects. Send me your code and I'll review it before we start.
Can we communicate in Spanish?
Absolutely. I'm a native Spanish speaker based in Colombia. We can communicate in Spanish throughout the entire project.
