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$20/hr
100%
Job Success
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I help startups and businesses build high-performance mobile applications for iOS and Android using Flutter, Firebase, and Node.js.
Over the years, I've worked on booking platforms, telematics systems, real-time tracking applications, marketplaces, wellness apps, and AI-powered products. My focus is not just writing code but delivering mobile apps that are scalable, reliable, and ready for production.
What I Can Help You Build
✔ Cross-platform mobile apps with Flutter
✔ MVP development for startups
✔ Firebase Authentication, Firestore & Cloud Functions
✔ REST APIs & Node.js backends
✔ Google Maps, GPS Tracking & Geolocation
✔ Push Notifications (FCM)
✔ Real-time Chat & Live Data Applications
✔ Payment Gateway Integration (Stripe, PayPal, In-App Purchases)
✔ FlutterFlow Development & Custom Code Extensions
✔ AI Integrations using OpenAI & Claude APIs
✔ App Store & Google Play Deployment
Recent Projects
Telematics Tracking Platform
Real-time vehicle tracking
GPS monitoring
Driver activity tracking
Cross-platform Flutter application
LINES
Real-time nightlife and event platform
Custom APIs
Redis caching
High-performance backend architecture
Stayhopper
Hotel and apartment booking application
Payment integrations
Booking workflows
Mobile-first experience
Pet Care Platform
Community-driven mobile application
Location-based services
User-generated content
Firebase backend
Why Clients Hire Me
✓ Top Rated Upwork Freelancer
✓ Proven track record with Flutter & Firebase projects
✓ Strong communication and project ownership
✓ Clean, maintainable code
✓ Focus on performance and user experience
✓ Long-term support after launch
If you're looking for a developer who can take your idea from concept to App Store and Google Play release, let's discuss your project.
$25/hr
100%
Job Success
$20K+ earned
Offers consultations
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I help startups and businesses build scalable Flutter mobile apps — from MVP to production-ready products.
With 6+ years of experience in Flutter development, I’ve delivered high-performance iOS & Android applications focused on speed, scalability, clean architecture, and long-term maintainability.
I work with founders, startups, and growing businesses that need more than just a developer — they need a reliable technical partner who can turn ideas into polished, production-ready mobile apps.
What I Can Help You With
✔ Full Flutter App Development
✔ FlutterFlow Development & Customization
✔ MVP Development for Startups
✔ Firebase & Backend Integration
✔ REST APIs & Third-Party Services
✔ Real-Time Features (Chat, Notifications, Streaming)
✔ Scalable App Architecture
✔ CI/CD Automation
✔ App Performance Optimization
✔ App Store & Play Store Deployment
✔ Long-Term Maintenance & Feature Scaling
Why Clients Work With Me
- 6+ years of hands-on Flutter experience
- Strong focus on scalable and maintainable code
- Fast execution with clear communication
- Experience handling complete app lifecycles
- Published production apps on both iOS & Android
- Agency-level quality with startup-friendly execution
- Ability to convert FlutterFlow MVPs into scalable production apps
I’ve worked on mobile applications across multiple industries including:
- Social & Messaging Apps
- Video Streaming Platforms
- Marketplace Applications
- Business & Productivity Tools
- Real Estate Platforms
- On-Demand Services
- Subscription-Based Apps
- Tech Stack
Flutter • FlutterFlow • Dart • Firebase • Firestore • Cloud Functions • REST APIs • Node.js • Laravel • Vue.js • AWS • CI/CD • Google Maps • Push Notifications • Payment Gateway Integration • Ad Integration • App Store Deployment • Play Store Deployment
My Approach
I focus on building apps that are:
- scalable
- cleanly structured
- user-friendly
- optimized for performance
- easy to maintain long term
Whether you need to build an MVP quickly, improve an existing Flutter application, or scale your product for growth, I can help deliver a stable and production-ready solution.
If you’re looking for a Flutter expert who understands both technical execution and product scalability, let’s discuss your project goals.
Nirav K.
has worked
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$30/hr
100%
Job Success
$400K+ earned
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Full-stack developer specialising in Flutter for sleek, cross-platform frontends and Java/GCP/AWS for robust backend systems. AI adopter.
Flutter Development.
5 years of experience creating high-performance cross-platform applications with Flutter, covering mobile, web, and desktop platforms. Proven ability to develop complex solutions, including networking, video streaming, marketplaces, and social applications.
Java Enterprise Development.
13 years of hands-on experience building robust Java enterprise applications, specializing in custom development for open-source ERP systems. Strong expertise in business process automation and enterprise data modelling.
Backend Expertise.
Capable of designing and integrating backend solutions, whether leveraging cloud services like Firebase and AWS or implementing custom Java-based architectures.
Experienced in implementing and automating testing processes, including unit testing and integration testing, to ensure software reliability and maintainability.
With a deep understanding of software development and a passion for creating scalable, efficient applications, I bring a results-driven approach to every project.
Oleg A.
has worked
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$32/hr
100%
Job Success
$40K+ earned
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🚀 Experienced Developer Specializing in Scalable Applications & AI-Driven Solutions 🚀
With over 6 years of expertise in Firebase, Node.js, and TypeScript, 4+ years in Flutter, and a strong background in AI Agents and Prompt Engineering, I specialize in creating high-quality, scalable solutions for diverse industries. Whether you need a real-time application, IoT solution, financial system, or AI-powered app, I bring a proven ability to deliver tailored results.
Key Skills and Expertise
👉 Firebase: Cloud Functions, Firestore, Realtime Database, Cloud Storage, Push Notification(FCM) and Authentication
👉 Backend Engineering: Scalable, secure API design and implementation
👉 Flutter Development: Cross-platform mobile apps and interactive games with exceptional UI/UX
👉 AI Agents and Prompt Engineering: Intelligent systems and optimized AI solutions
👉 TypeScript and Node.js: Production-grade, maintainable, and efficient code
Why Work With Me?
✔️ Versatile Experience: I’ve worked on projects across various industries, including social media, IoT, finance, real-time systems, and AI-driven tools.
✔️ End-to-End Solutions: From backend systems to fully functional cross-platform apps, I handle complete project lifecycles.
✔️ Innovative Approach: I leverage AI capabilities and prompt engineering to deliver cutting-edge, user-centric applications.
✔️ Proven Impact: I’ve built and deployed applications serving thousands of users with exceptional reliability and scalability.
✔️ Clear Communication: I ensure seamless collaboration with regular updates and transparent processes.
Let’s turn your ideas into impactful, scalable, and intelligent solutions. Contact me to discuss your project today!
Anil N.
has worked
.
$60/hr
100%
Job Success
$5K earned
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I've spent the last decade building and scaling software products as a CTO and co-founder. Over 100 projects shipped across SaaS platforms, marketplace platforms, mobile apps, admin dashboards, and enterprise systems.
I handle everything from Figma UI/UX design and prototyping to backend architecture to deployment. When you work with me, you get one person who owns the entire process. No coordinating between designers or developers. No miscommunication. I take your idea from strategy to a live, working product.
Here's what that actually looks like:
→ A fully designed and built product, not just wireframes or a plan
→ One point of contact who understands both the business side and the technical side
→ Honest feedback on what to build and what to skip. I'm not a yes man who builds whatever you ask without thinking about whether it actually makes sense for your business
→ Clean, scalable code that won't fall apart when you start growing
🤔 What My Clients Say:
⭐⭐⭐⭐⭐ "Abdel was easy to work with and quick to adapt. Everything works smoothly now." | The Sonderhood
⭐⭐⭐⭐⭐ "He gave us tools that made scaling possible. We can focus on growing the brand now." | Golverd
⭐⭐⭐⭐⭐ "The platform feels premium, which is exactly what we needed. The booking flow is seamless." | Lore
🚀 Selected Case Studies:
🏆 ROAP | Sports Academy Marketplace (UAE)
Built a dual-sided marketplace platform with a parent-facing mobile app (Flutter) and a full ERP admin dashboard. Multi-tenant architecture supporting dozens of academies. Scaled to 1,000+ active users across the UAE.
📍 Venu | AI-Powered Venue Marketplace
Engineered an AI search engine (OpenAI + LLMs) that lets users find event spaces using natural language. Built on Next.js with PostgreSQL. 10,000+ active users, high retention, and simplified discovery for everything from co-working spaces to wedding villas.
🔗 Bravo Link | AI Smart Notebook
Built a proprietary AI engine with OCR that converts handwriting to digital text, integrated with task delegation and calendar sync. 8,000+ professional users.
💅 Lore | On-Demand Beauty Services
Shipped a three-sided platform. Customer app, professional app, and admin dashboard. Full booking flow, real-time availability, Stripe payments, subscription systems, and review system.
👨💻 How I Work:
I handle the full lifecycle. UI/UX design in Figma, frontend, backend, deployment. You get the speed of working with one senior full stack developer without the overhead of managing a team.
⚙️ Tech Stack:
Frontend: Next.js, React, TypeScript, React Native, Flutter
Backend: Node.js, Express.js, NestJS, REST APIs, GraphQL
Databases: PostgreSQL, MongoDB, Supabase, Firebase
Payments & Infra: Stripe, billing systems, webhooks, authentication
AI: OpenAI, Anthropic (Claude), LLMs, AI integrations, machine learning
Mobile: iOS, Android (React Native & Flutter)
Design: Figma, UI/UX, prototyping
I specialize in SaaS MVP development, B2B SaaS, multi-tenant architecture, marketplace platforms, subscription systems, internal tools, and web applications. I architect systems that hold up under real traffic. You focus on your business. I make sure the technology never becomes a bottleneck.
📞 Ready to talk about your project? Hit the Message button and tell me what you're building. I'll give you an honest assessment of what it takes and how I'd approach it.
$28/hr
100%
Job Success
$60K+ earned
Offers consultations
Start of list.
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I’m a Senior Mobile App Developer with 12+ years of experience in Android Kotlin/Java and Flutter. I build production-ready mobile apps with clean architecture, strong performance, and long-term maintainability.
My main expertise is Flutter app development, native Android Kotlin development, Firebase, REST APIs, GraphQL, AWS integration, background processing, offline support, push notifications, payments, subscriptions, and scalable app architecture.
I also have strong experience in AI-powered mobile apps, including TensorFlow Lite, YOLO, SSD object detection, pose models, real-time camera processing, RTSP/IP camera streams, image processing, OpenCV, native C/C++, JNI/NDK, and Flutter platform channels.
I have worked on apps across healthcare, construction, inventory, social platforms, AI camera systems, warehouse tools, and enterprise mobile products. My recent work includes AI camera apps, inventory/counting apps, Firebase-based transaction apps, voice-enabled medical workflows, and Flutter apps with modular clean architecture.
I can help with building a Flutter or Android app from scratch, improving an existing app, fixing performance problems, reducing crashes/ANRs, integrating APIs, adding Firebase/AWS backend workflows, implementing AI/ML features, and handling Flutter-to-native Android integrations.
I focus on practical engineering: clean code, clear communication, proper error handling, performance logs, memory optimization, and architecture that your team can maintain after launch.
If you need a mobile developer who can handle both product delivery and deep technical implementation, I’d be happy to discuss your project.
$27/hr
87%
Job Success
$10K+ earned
Offers consultations
Start of list.
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Your iOS app needs to ship fast, run smoothly, and pass App Store review without surprises.
I help startups and growing businesses fix critical iOS issues, build new features, and launch production-ready apps using Swift, SwiftUI, Firebase, and Objective‑C.
If you are dealing with crashes, slow performance, broken payments, or a blocked App Store release, I jump in, diagnose the problem, and ship clean, tested solutions. You get clear communication, frequent TestFlight builds, and code your team can maintain long after we’re done.
What I Deliver (as a Senior iOS Developer):
- Full native iOS app development from scratch (Swift / SwiftUI) with clean, scalable architecture
- Legacy code refactors and migrations (Objective‑C / old Swift to SwiftUI) without user disruption
- Bug fixing and performance optimization for existing apps (crashes, lag, memory, UI issues)
- API integration (REST, Firebase, Supabase, custom backends) and secure payments / subscriptions
- App Store deployment, TestFlight setup, CI/CD support (Fastlane), and review / rejection fixes
- Advanced features: offline backup, real-time camera & video processing, AI / OpenAI integrations
Results I’ve Delivered:
1) One‑Tap iOS Backup App (Photos, Videos & Contacts → USB‑C drives)
- Built a native iOS app that backs up photos, videos, and contacts to external USB‑C/Lightning drives with a single tap.
- Implemented PhotoKit and Contacts to export original-quality media and vCard files directly to SSDs and thumb drives.
- Designed a clean SwiftUI interface with clear permissions, progress, and success states.
- Client feedback: “beautifully designed, highly functional… final result exceeded our expectations.”
2) Real-Time Background Removal with AVFoundation & CoreML
- Developed a real-time background removal / replacement feature for a live camera session.
- Integrated a CoreML segmentation model with AVFoundation and optimized the pipeline with Metal and multithreading.
- Achieved smooth, high-quality background processing with no noticeable frame drops across multiple iOS devices.
- Approved as the base for the next phase of feature development.
3) Secure PDF Protection with Encryption (Objective‑C)
- Built a PDF protection system that encrypts documents while keeping hyperlinks and interactive elements working.
- Disabled editing and printing without converting pages to images, preserving quality.
- Solution passed extensive testing against professional PDF tools and online services.
- Client: “truly a 5‑star experience… exceeded my expectations with quality and attention to detail.”
4) iOS UI Refresh to Match TikTok‑Style Android App
- Updated an existing iOS app UI to match a TikTok-like Android design while preserving performance and compatibility.
- Implemented new layouts and interactions in Swift and UIKit, tested across devices, and fixed UI bugs.
- Delivered a consistent cross‑platform experience and successfully submitted the app to the App Store.
5) Payment & Environment Fix for Production Launch
- Resolved a critical payment issue caused by a missing “business type” field in API calls.
- Reconfigured endpoints from staging to production and prepared builds for TestFlight testing.
- Client shipped a working production app with a stable payment flow and quick turnaround.
6) Urgent iOS Fix Under a 2‑Hour Deadline
- Hired as a Swift iOS developer to fix UI color/text issues with a strict 2‑hour deadline.
- Diagnosed and fixed a Firebase configuration problem blocking signup, in addition to the original UI tasks.
- Delivered on time, restored authentication, and improved overall app stability.
- Client: “professional, organized… attention to detail. Quality work.”
If you need a senior iOS developer who can own the whole lifecycle—from architecture and advanced features to bug fixing and App Store release—send me a message and let’s discuss your app.
Ghullam A.
has worked
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$10/hr
100%
Job Success
$70K+ earned
Offers consultations
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Flutter & Firebase developer specializing in AI chatbots and cross-platform apps. 10+ years experience building iOS, Android, and web applications worldwide.
I’m a Flutter & Firebase developer specializing in AI chatbots and cross-platform mobile apps. With 10+ years of experience, I create fast, scalable, and user-friendly apps.
Clients from around the world:
🇺🇸 USA | 🇬🇧 UK | 🇨🇦 Canada | 🇮🇱 Israel
🇩🇰 Denmark | 🇰🇪 Kenya | 🇦🇺 Australia | 🇸🇪 Sweden | 🇧🇷 Brazil
Core Expertise:
💙 Flutter : Cross-platform apps (iOS, Android, Web)
🔥 Firebase : Cloud Firestore, Auth, Cloud Functions, Firebase Cloud Messaging (FCM)
🤖 AI Chatbots : LLM, LangChain, Pinecone, GPT integration
🌍 Web & Mobile Apps : Location-based, Audio, E-commerce
🛠️ Backend Systems : Multitenancy, In-App Purchases, APIs
As a founder & developer, I manage projects from concept, design, development, testing, to launch.
I excel at understanding client needs, clear communication, and delivering apps that make an impact.
Isherpreet S.
has worked
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$35/hr
100%
Job Success
$100K+ earned
Available now
Offers consultations
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I am a Flutter App Developer with 5+ years of commercial experience building scalable, high-performance Mobile App solutions using Flutter and Firebase.
As a Flutter App Developer, I specialize in delivering full-cycle Mobile App development - from MVP to production-ready applications used by thousands of users.
My core expertise as a Flutter App Developer includes building complex Flutter applications with Firebase backend integration, real-time features, and scalable architecture.
💼 What I do as a Flutter App Developer
As a Flutter App Developer, I build modern Mobile App products using Flutter combined with Firebase services.
✔ Cross-platform Mobile App development with Flutter
✔ Backend integration using Firebase (Auth, Firestore, FCM)
✔ Scalable architecture (Clean Architecture, BLoC, GetX)
✔ Real-time features (WebSockets, chat, live dashboards)
✔ API integration (REST API, GraphQL)
✔ CI/CD and deployment (App Store, Google Play)
🧠 Expertise
As a Flutter App Developer, I have strong experience working with:
Flutter for high-performance UI
Firebase for backend infrastructure
Mobile App architecture and scalability
Clean Architecture and SOLID principles
State management (BLoC, GetX, Riverpod)
I build every Mobile App with a focus on performance, scalability, and long-term maintainability.
📱 Project Experience
As a Flutter App Developer, I have worked on multiple real-world Mobile App projects:
📈 Results
✔ Delivered multiple production-ready Mobile App products
✔ Built scalable Flutter architectures for long-term growth
✔ Implemented real-time systems using Firebase
✔ Successfully published apps to App Store & Google Play
🤝 Why work with me?
As a Flutter App Developer, I focus on:
✔ Clean and scalable Flutter code
✔ Reliable backend with Firebase
✔ Fast delivery of Mobile App MVPs
✔ Clear communication and structured workflow
Associated with
InAppo
$700K+
earned
$25/hr
100%
Job Success
Available now
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Top Rated Flutter developer with 100% job success and 4+ years building production apps for startups and small businesses. I've shipped 15+ cross-platform apps on iOS and Android — including fintech, eCommerce, SaaS, POS, and task management apps now live in production.
Most of my clients come to me with one of three problems:
(1) they have a designer's mockup and need it built right the first time,
(2) they have a half-finished app that needs to be fixed and shipped, or
(3) they need to add real-world features like payments, push notifications, or offline sync to an existing build. I handle all three.
What I build:
- Cross-platform mobile apps in Flutter (iOS + Android from one codebase)
- Firebase-powered backends: Auth, Firestore, Cloud Functions, Push Notifications
- Payment integrations with Stripe and in-app purchases
- REST API integrations and custom backend connections
- State management done right with BLoC, GetX, or Provider
- App Store and Play Store submissions, end to end
Why clients hire me again:
Clean, maintainable code you can hand to the next developer without embarrassment
I write tests, document what I build, and don't disappear after delivery
Honest timelines — if your idea is a 6-week build, I'll tell you, not promise 2 to win the job
Send me a message with your project details and I'll get back to you within a few hours with honest feedback on scope, timeline, and approach.
Usama A.
has worked
.