Flutter app development
Product flows, UI implementation, state and data handling, platform integration, and maintainable delivery for Android and iOS.
FLUTTER • ANDROID • IOS
Flutter Developer for Android & iOS Apps
I build, improve, diagnose, and publish Flutter applications for founders and teams who need practical mobile development—not a generic hand-off. Start through Upwork with a defined issue, an existing codebase, or a product that needs to move forward.
Flutter • Android • iOS • Firebase • App Publishing
THE RIGHT STARTING POINT
Flutter help for the stage your app is in now
You may be starting a new mobile product, inheriting a Flutter codebase, or trying to get a nearly finished app through release. Those situations need different decisions. A new build benefits from deliberate architecture and platform planning. An existing app usually needs targeted diagnosis before anyone changes code. A blocked release needs close attention to the native project and store configuration, not just the Dart layer.
I work across Flutter application code and the surrounding delivery stack: Firebase, REST APIs, Android and iOS configuration, build tooling, signing, notifications, and store submission. That makes this page a starting point for full Flutter development and for the focused services below.
RECOGNIZE THE SYMPTOM
Do you need a Flutter developer for one of these situations?
A useful engagement starts with the business or technical constraint—not a predetermined package.
A new Android and iOS app
You have a product idea or defined workflow and want one maintainable Flutter codebase for both platforms.
An existing app that needs improvement
The application works, but features, stability, code quality, integrations, or release readiness need attention.
A bug blocking users or delivery
A crash, broken flow, dependency conflict, API issue, or build failure is preventing the next release.
Firebase is not behaving correctly
Authentication, Firestore, notifications, initialization, or platform-specific configuration needs diagnosis.
Store publishing is stalled
Google Play, TestFlight, App Store Connect, signing, or a review response is blocking submission.
A backend or AI feature needs integration
The Flutter client needs a reliable REST API, secure authentication, Firebase service, or AI-assisted workflow.
FOCUSED FLUTTER SUPPORT
Flutter development services
Choose the closest match. If the issue crosses several areas, send the full context and I will help separate the work into a sensible order.
Existing-app improvements
New features, codebase orientation, package upgrades, release preparation, and focused modernization without unnecessary rebuilding.
Firebase and APIs
Authentication, Firestore, Cloud Messaging, REST APIs, secure data flows, initialization, and environment configuration.
Bug diagnosis and maintenance
Crashes, UI and state issues, native build problems, performance symptoms, release bugs, and dependency conflicts.
Google Play and App Store
Release builds, signing, store setup, submission blockers, rejection troubleshooting, TestFlight, and resubmission preparation.
AI-enabled mobile features
Thoughtful integration of AI services into a mobile workflow, including API design, loading and error states, and responsible user experience.
CHOOSE YOUR CURRENT BLOCKER
Focused Flutter problem-solving services
Each page goes deeper into the technical and store-specific questions buyers usually have before hiring.
Google Play Rejection Fix
Diagnose Play Console messages, release configuration, permissions, policy-related implementation, and resubmission blockers.
Explore this serviceFlutter Firebase Fix
Resolve authentication, Firestore, FCM, initialization, security-rule, and platform configuration issues.
Explore this serviceApp Store Publishing Help
Prepare Flutter iOS builds, signing, TestFlight, App Store Connect, and rejection troubleshooting.
Explore this serviceFlutter Bug Fixing
Trace crashes, broken flows, build errors, dependency conflicts, API issues, and release-only bugs.
Explore this serviceA PRACTICAL PROCESS
How I approach the problem
The goal is to make the next decision obvious. I start by understanding the current state, then narrow the scope before implementation.
- 01
Diagnose
I review the error, reproduction steps, relevant logs, current Flutter and dependency versions, and the platform configuration around the failing flow.
- 02
Identify the root cause
I separate symptoms from the underlying problem and determine whether it comes from Dart code, native configuration, Firebase, an API, dependencies, signing, or store setup.
- 03
Fix and test
I implement the smallest maintainable fix, then test the affected flow and the nearby paths most likely to regress on Android, iOS, or both.
- 04
Deliver clearly
I explain what changed, call out any remaining product or store decisions, and prepare the code, build, or submission for its next step.
RELEVANT TECHNOLOGIES
Tools around the Flutter application
The exact stack depends on the codebase and the problem. These are the technologies most relevant to this service.
- Flutter
- Dart
- Firebase
- Firestore
- Firebase Auth
- FCM
- REST APIs
- Android
- iOS
- Google Play
- App Store Connect
- Git
- Supabase
WORKING TOGETHER
Why work with me?
Credibility should come from how the work is handled—not inflated promises.
Diagnosis before changes
A precise diagnosis prevents unrelated rewrites and keeps the scope focused on the actual blocker.
Existing-app experience
I am comfortable entering an established codebase, tracing unfamiliar flows, and improving it without treating every issue as a rebuild.
Android and iOS awareness
Flutter shares application code, but release builds, permissions, signing, entitlements, and store requirements still need platform-specific attention.
Clear communication
You receive a practical explanation of the cause, the work completed, what was tested, and what you should do next.
App and backend context
I can trace problems across Flutter UI, state, Firebase, REST APIs, authentication, push notifications, and native configuration.
Testing before delivery
The affected path is checked after the fix, with attention to release-mode and cross-platform differences when they are relevant.
REAL WORK FROM THIS PORTFOLIO
Selected mobile application work
These are existing projects already published on this website. Each card focuses on the problem and the application solution without inventing client metrics.
FilmFone Chat
- Problem
- Filmmakers needed a practical way to create and play realistic on-screen chat conversations for scenes.
- What I implemented
- Character creation, scene-based conversations, message timing, playback, appearance controls, and multi-participant chats.
- Technology
- Cross-platform mobile application for iOS and Android
- Solution
- A focused production tool available through both Google Play and the App Store.
Isotop Forms
- Problem
- Internal auditors and sales teams needed a guided way to collect customer information during on-site quotation visits.
- What I implemented
- A step-by-step mobile workflow, document handling, recent-case views, and a clear interface for field use.
- Technology
- High-performance iOS and Android business application
- Solution
- A streamlined field-data workflow designed around speed, clarity, and reliable day-to-day use.
Lockbox Private Communication
- Problem
- The product needed a privacy-first messaging approach beyond the protections offered by general communication apps.
- What I implemented
- A secure messaging design covering encrypted communication, spam-link detection, file sharing, group chats, and privacy controls.
- Technology
- Cross-platform mobile architecture and secure communication features
- Solution
- A defined and implemented foundation for a private, feature-rich messaging experience.
Dr. Lawyer
- Problem
- Clients needed an easier way to find relevant legal help while lawyers needed a structured channel for qualified opportunities.
- What I implemented
- Role-based experiences, lawyer discovery, matching, professional profiles, secure chat, document sharing, and subscription flows.
- Technology
- SaaS mobile application with messaging and role-based workflows
- Solution
- A two-sided mobile product connecting clients and legal professionals through a focused experience.
A CLEAR WAY TO START
Prefer working through Upwork?
Hire me securely through my Upwork profile or start with my fixed-price Flutter development service. The links open the official Upwork destinations in a new tab.
Fixed-price service on Upwork
FLUTTER DEVELOPMENT SERVICE
Flutter App Development | Android & iOS | Firebase & AI Integration
Development, bug fixing, Firebase and API integrations, publishing, and focused improvements for existing applications.
REDUCE THE BACK-AND-FORTH
Send me these 3 things to start
A short, specific first message is enough. You do not need to prepare a formal specification before reaching out.
Send My Flutter Project on Upwork- 1
What the app or feature needs to accomplish
- 2
What exists today: idea, designs, codebase, build, or live app
- 3
Your immediate priority, platform, and known blocker
COMMON QUESTIONS
Flutter Development FAQ
Practical answers before you share access or start a contract.
See what to send firstCan you work on an existing Flutter application?
Yes. Existing-app work can include diagnosis, feature implementation, dependency updates, Firebase or API integration, native configuration, build fixes, maintenance, and release preparation. I first review the codebase and the specific goal so the work stays focused.
Can you build for both Android and iOS?
Yes. Flutter is well suited to sharing application code across Android and iOS, while still allowing the platform-specific configuration required for permissions, signing, notifications, capabilities, and release builds.
Do you handle Firebase and REST API integration?
Yes. I can implement or troubleshoot authentication, Firestore, Firebase Cloud Messaging, initialization, REST API data flows, error handling, and the Flutter states around loading, success, and failure.
Can you help publish the completed app?
Yes. I can help prepare Android and iOS release builds, work through signing and configuration, and assist with Google Play, TestFlight, and App Store Connect. Store approval is controlled by Google or Apple and cannot be guaranteed.
How do we start through Upwork?
Open my Upwork profile or fixed-price Flutter service and send the current state, desired outcome, and any blocker or error. I can then identify the most useful next step and clarify the scope.
Do I need to know the technical cause before contacting you?
No. Describe what you expected, what currently happens, and which platform is affected. Diagnosis is part of the work when the cause is not yet known.
NEXT STEP
Need a Flutter developer who can move the app forward?
Send the current state of your Flutter project through Upwork. I will review the context and help define the clearest next step.