mobile app developer
Hire a Mobile App Developer
A mobile app developer at Bracket Coder builds cross-platform iOS and Android apps from a single Flutter codebase, backed by a secure server your app can actually grow into. Instead of paying two teams to build and maintain a separate Swift app and a separate Kotlin app, you get one codebase that ships to both stores plus a Django/Python backend that handles login, data, payments and notifications. We are a small team of senior engineers led by Sharan Sifat, so the person who scopes your app is the same person writing its code.
We work best with founders and companies that need a real product, not a demo that falls over in month three. That means proper state management, sensible offline handling, secure API calls, and an app that still builds cleanly a year later when iOS or Android pushes an update. Whether you are launching something new or rescuing an app that stalled, we scope the work honestly and tell you what is worth building first.
What a cross-platform mobile app developer actually does
The visible part is the app itself: the screens, navigation, forms and animations users tap through. We build that UI in Flutter, which compiles to genuinely native iOS and Android from one codebase, so a fix or a new feature lands on both platforms at once instead of being rebuilt twice. Underneath that, the work is the harder half: wiring up device features like camera, GPS, biometrics, push notifications and secure on-device storage; choosing state management (Riverpod, Bloc or Provider) that keeps the app predictable as it grows; caching data so the app still works on a weak connection; and getting through App Store and Play Store review. A good mobile developer treats all of that as one job, not a UI layer bolted onto someone else's plumbing.
One codebase, one secure backend
Most real apps are only half mobile. The other half is the server they talk to. Because we build both, the contract between your app and its backend stays clean instead of turning into a guessing game between two vendors. On the backend we use Django and Python to handle token-based authentication, role-based access, a versioned REST API, payment flows with Stripe, file storage, and real-time features over WebSockets when your app needs live updates. Push notifications go through Firebase Cloud Messaging and APNs, wired to the same backend so a delivery status or a new message reaches the right device. If you already have an API, we integrate with it and stay in our lane; if you do not, we build one that is documented and yours to keep.
When Flutter is the right call, and when it isn't
Flutter is the right choice for most business apps: marketplaces, booking and on-demand apps, dashboards, social and community apps, internal tools and customer portals. For these, a single codebase cuts cost, keeps both platforms in feature-sync, and lets a small team move quickly without cutting corners on quality. We are honest about the edges, though. If your product depends on heavy augmented reality, a high-end 3D game engine, or deep platform-specific hardware access, fully native Swift or Kotlin can be the better tool, and we will tell you that before you spend money rather than after. The goal is an app that fits your product, not a stack we are trying to sell.
How hiring a mobile app developer works
It starts with a free consultation where we listen to what you are building and what success looks like. From there we scope the work and give you a fixed-range estimate broken down by milestone, so you are not signing a blank cheque. We design the screens, then build in milestones you can install and test yourself through TestFlight and Play Console internal testing, so you see progress instead of waiting months for a big reveal. When it is ready we handle submission to App Store Connect and Google Play, including the store listings and review back-and-forth. After launch we can stay on for OS updates, bug fixes and new features. We work as a full build team, as staff augmentation alongside your people, or as a takeover crew for an app another developer left unfinished.
Related services
Frequently asked questions
How much does it cost to hire a mobile app developer?+
Cost depends on how many screens, integrations and backend features your app needs. After a free consultation we give a fixed-range estimate broken down by milestone, so you know the scope before you commit. A focused MVP is far cheaper than a full product with payments, chat and an admin panel, and we help you decide what to build first so your budget goes to the parts that matter.
Will one app work on both iPhone and Android?+
Yes. We build in Flutter, which compiles from a single codebase to native iOS and Android. One team maintains it, features stay in sync across both platforms, and the app follows each platform's look and behaviour where it counts. That is the main reason cross-platform costs less than building and maintaining two separate native apps.
Can you take over an app another developer started?+
Yes. We start with a takeover audit: we read the existing code, check the build and store setup, and give you an honest picture of its state. From there we fix what is broken and continue development, or recommend a rebuild if that is genuinely cheaper in the long run. This is a common request and we treat it as ongoing maintenance and support, not a fresh start you pay full price for.
Do you build the backend too, or just the app?+
Both. We build the Django/Python backend, the API, authentication, payments, notifications and any admin tools your team needs to run the product. If you already have a backend or API, we integrate with it instead and keep our work to the app. Either way you get a clear contract between app and server, because the same team owns both sides.
Who owns the code and the app store accounts?+
You do. You get the full source code for the app and backend, and the app is published under your own Apple Developer and Google Play accounts, not ours. That means you are never locked in, and you can bring in another team later if you choose to.
Ready to build with a senior mobile app developer?
Tell us what you're building — we'll reply within one business day with a clear next step.
Start the conversation