Flutter app development services
Flutter app development services for cross-platform iOS and Android apps: banking and fintech apps, health and fitness apps, social, streaming and shopping apps, Flutter for web and desktop, and the backend the app talks to, plus take-overs of existing Flutter apps, with dedicated Flutter developers for your team or an app delivered end to end.
What we build with Flutter
Cross-platform mobile apps
One Dart codebase for iOS and Android on current Flutter, with state in Riverpod or Bloc, navigation through go_router, and platform-specific touches where users expect them.
Fintech apps in Flutter
Biometric sign-in, cards, transfers and statements, and payments through Apple Pay, Google Pay or Stripe, with secrets in the platform keystore, certificate pinning and checks for rooted or jailbroken devices.
Health and fitness apps
Apps that read HealthKit and Health Connect data, pair with wearables over Bluetooth Low Energy and run video consultations, with personal health data encrypted on the device and in transit.
Consumer apps in Flutter
Social, streaming and shopping apps with feeds, chat, video playback, catalogues and checkout, subscriptions and in-app purchases through the stores or RevenueCat, and push notifications that open the right screen.
Device features and native code
Camera, NFC, maps, background location and Bluetooth through maintained plugins, or through platform channels, Pigeon and dart:ffi when no plugin fits, tested on real devices.
Backends for Flutter apps
Firebase or Supabase where they fit, or APIs, push and sign-in built by our .NET or Python engineers, with offline storage in drift and sync rules decided up front.
Flutter for web and desktop
The same codebase compiled to JavaScript or WebAssembly for the browser and to native Windows, macOS and Linux apps, for internal tools, kiosks and companion apps.
Store releases and code push
Signed builds for both stores from Codemagic, GitHub Actions or fastlane, staged rollouts, crash reporting in Crashlytics or Sentry, and urgent Dart fixes shipped through Shorebird where store rules allow.
Inherited Flutter apps
Flutter apps whose original developers have gone, starting with a read-only review of the code, the plugins and the release setup, then upgrades to current Flutter and Dart with abandoned packages replaced.
Hire Flutter developers
Dedicated Flutter developers
Flutter developers who join your team full time, work in your repositories, tracker and meetings, and report to your lead. You interview them; we carry the Ukrainian contract, payroll, invoicing and leave.
Flutter project delivery
A team that takes the Flutter project from scope to release: estimate, build, tests and deployment, with a technical lead on our side who owns the plan and the quality.
Flutter support and take-overs
An existing Flutter system taken over from another team or kept running: a read-only review and a written list of risks first, then fixes and new features in order of impact.
The dedicated team page explains how specialists join your team, and the outsourcing page covers project delivery, take-overs and how we charge.
Who works on your Flutter project
Flutter developers
Dart and Flutter for iOS, Android, web and desktop
iOS and Android engineers
Native modules in Swift and Kotlin
Backend engineers
The API, push and sign-in
UI and UX designers
Figma designs for both platforms
QA engineers
Device testing and automation
How we work on Flutter
Dart 3 with sound null safety and strict lints, widget and golden tests with each feature, integration tests on real iOS and Android devices, performance profiled in Flutter DevTools on low-end phones rather than in the simulator, and no API keys or other secrets shipped inside the app bundle.
Developers work in your repositories, your tracker and your process. The Ukrainian contract, payroll, invoicing and leave stay with us, and everything they write is assigned to you.
Other frameworks we work in
Laravel development
Laravel development services: web applications and APIs, online shops and marketplaces, SaaS products, payment back offices, admin panels and Laravel upgrades, with dedicated Laravel developers or project delivery.
Django and FastAPI development
Django and FastAPI development services: web applications, REST APIs, AI and LLM back ends, data pipelines, fintech and e-commerce platforms and Django upgrades, with dedicated developers or project delivery.
Next.js development
Next.js development services: web applications, SaaS front ends, e-commerce storefronts, marketing sites, AI product interfaces and migrations to the App Router, with dedicated Next.js developers or project delivery.
Vue.js and Nuxt development
Vue.js and Nuxt development services: Vue 3 applications, Nuxt sites, storefronts, SaaS dashboards, front ends for Laravel and other backends, and Vue 2 migrations, with dedicated Vue.js developers or project delivery.
Ruby on Rails development
Ruby on Rails development services: web applications, SaaS products, shops and marketplaces, APIs, Hotwire Native apps, and upgrades and take-overs of Rails codebases, with dedicated Rails developers or project delivery.
Symfony development
Symfony development services: web applications, APIs on API Platform, SaaS and enterprise systems, Sylius and Shopware shops, Drupal modules and Symfony upgrades, with dedicated Symfony developers or project delivery.
Spring Boot development
Spring Boot development services: microservices and APIs, Spring Cloud, Spring Security and single sign-on, Spring Batch, Spring AI and Spring Boot 4 upgrades, with dedicated Spring Boot developers or project delivery.
React Native app development
React Native app development services: iOS and Android apps with Expo, native modules, moves to the New Architecture, over-the-air updates and store releases, with dedicated React Native developers or project delivery.
Electron app development
Electron app development services: desktop apps for Windows, macOS and Linux, auto-update, code signing and notarisation, native modules, upgrades and migrations, with dedicated Electron developers or project delivery.
Questions about Flutter development
Which industries do your Flutter developers work in?
Fintech most of all: banking, payment, investment and insurance apps. Then healthcare and fitness, with telemedicine, wellbeing and workout apps; media and consumer apps, with streaming, social and dating apps; e-commerce, with shopping and delivery apps; and education, with learning apps for children and adults.
Can a Flutter app use native device features?
Yes. Camera, Bluetooth, NFC, payments, health data and background work are reached through maintained plugins, or through platform channels and Pigeon to Swift and Kotlin code, and tested on real devices rather than only in simulators.
Can you add Flutter to our existing native app?
Yes. Flutter screens can be added to an existing iOS or Android app one feature at a time with add-to-app, so the app keeps shipping while more of it moves to the shared codebase.
How quickly can Flutter developers start?
When the right Flutter developer is available, the start is gated only by your interview and the NDA and IP assignment. Otherwise we run a search, which typically produces candidate profiles within two to three weeks, and nobody starts until you have said yes.
How do we hire Flutter developers through BigTree108?
Tell us the work, the seniority and the hours you need. We propose one or two people with their profiles, you interview them the way you would interview your own hire, and you sign one agreement with BIG TREE 108 LLC and receive one invoice a month.
Who owns the work they produce?
You do. Every specialist has a signed contract with BigTree108 that assigns all work product to the company, and our agreement with you assigns it onward. Code, designs and documents are delivered into your own repositories and tools, not kept where only we can change them.
Building a Flutter app?
Tell us what the app does and who uses it. You get an answer within one business day: a plan, candidate profiles, or a review of the existing app.