iOS & Mobile App Developer with 12+ years of experience building, scaling, and maintaining production-ready mobile applications using Swift, SwiftUI, React Native, and Flutter.
As a Top Rated Plus freelancer with 100% Job Success, I've completed 50+ projects and 6,000+ hours on Upwork, helping startups, businesses, and established companies turn ideas into reliable, scalable mobile products.
Many apps work well initially but start struggling after launch with crashes, slow performance, scaling issues, and messy code. The root cause is often the architecture. I focus on building and fixing mobile systems that remain stable and scalable as they grow.
I personally lead every project from planning to delivery. For larger scope, I work with my in-house team of 25+ developers across iOS, Android, Web, QA, and DevOps. You get a single point of contact with full execution behind it.
๐ What I can help you with:
โ iOS App Development โ Swift, SwiftUI, UIKit
โ Mobile App Development โ React Native & Flutter
โ MVP to Production โ Build, launch, and scale mobile products
โ Existing App Development & Rescue โ Fix bugs, crashes, performance and technical debt
โ App Architecture & Refactoring โ Clean Architecture, MVVM, MVC
โ Performance & Stability โ Crash reduction, optimization and scalable codebases
โ API & Third-Party Integrations โ REST, GraphQL, Firebase, payments, maps, analytics
โ App Store Launch & Maintenance โ Testing, deployment, updates and ongoing support
โ๏ธ Core Development & Features:
โ Local database (Core Data, SQLite), offline sync
โ API integration (REST, GraphQL)
โ Authentication (Apple, Google, OAuth, JWT)
โ Push notifications (APNs, Firebase)
โ Background tasks & lifecycle handling
โ Secure data handling & performance tuning
๐ฅ Advanced Integrations:
โ AI integrations (OpenAI, ChatGPT features)
โ Payments (Apple Pay, Stripe, in-app purchases, subscriptions)
โ Location services (GPS, MapKit, Google Maps)
โ Real-time chat & messaging (Firebase, WebSockets)
โ Analytics (Firebase, Mixpanel)
โ Media handling (image/video upload, streaming)
๐ข Proven Work:
โญ Built and maintained a production system running across 150+ stores for Red Swan Pizza
๐ Extended Capabilities:
โ Backend coordination (Node.js, Firebase, AWS)
โ Android development support via team (Kotlin, Jetpack, Room)
โ Scalable system design for long-term growth
If you're building a new app or scaling an existing one, I can help you choose the right technical direction and avoid costly mistakes early.
๐ Feel free to message me. Happy to review your app or idea before we start.
iOS Development
Mobile App Development
Swift
SwiftUI
React Native
Flutter
UIKit
Objective-C
Apple Xcode
Mobile App Development Consultation
App Development
API Integration
REST API
Firebase
In-App Purchases
Payment Gateway Integration
Push Notifications
Mac OS App Development
AI App Development
Website to Mobile App Conversion
Girish N.
Noida, India
$15/hr
5.0
17 jobs
โTop Rated Plus Mobile App Developer | iOS | Flutter | Android | React Native
โExpert in Bug Fixing, App Performance, BLE, IoT & Scalable Mobile Apps
โWith 12+ years of experience in iOS and 5+ years in Flutter
I help startups build high-quality mobile apps (iOS & Android) with clean UI and fast performance. I have built 80+ apps including AI-based and SaaS platforms
Many apps work fine at the start but later run into problems like slow speed, crashes, or hard-to-manage code. Most of the time, the real issue is not just development , itโs how the app is structured from the beginning.
I focus on creating strong, clean architecture and improving existing apps so they stay fast, stable, and easy to scale over time.
I help businesses fix, build, and scale mobile apps that are fast, stable, and ready for production. If your app has bugs, crashes, or performance issues , I can quickly diagnose and resolve them.
I specialize in building high-performance mobile applications using Flutter, Swift, Kotlin, and React Native. I focus on clean architecture, scalable backend integration, and seamless user experience
โSERVICES I OFFER
โข Mobile App Development (iOS, Android, Flutter, React Native)
โข Bug Fixing, Crash Resolution & App Debugging
โข App Performance Optimization & Speed Improvement
โข Upgrade & Maintenance of Existing Apps
โข API Integration & Backend Development
โข UI/UX Implementation (Figma, Adobe XD)
โข App Store & Google Play Store Deployment.
โKEY SKILLS:
Flutter Developer | iOS Developer | Android Developer
Swift | SwiftUI | Kotlin | Dart | React Native
Firebase | Node.js | Laravel | REST API | GraphQL
BLE | Bluetooth | IoT | ESP32 | MQTT
Stripe | Razorpay | Apple Pay | Google Pay | In-App Purchase
WebRTC | Agora | Real-time Chat | Video Calling
AWS | CI/CD | Git | Sentry | TestFlight | Play Console
Achievements
โ 2M+ Downloads Mobile Application Delivered
โ 1M+ Users Healthcare Platform
โ IoT System Deployed in 125+ Stores
โ Multiple Apps Successfully Published on App Store & Play Store
WHY HIRE ME
โข Fast turnaround for bug fixing & urgent issues
โข Clean, scalable, and production-ready code
โข Strong communication & regular updates
โข 100% focus on client satisfaction and long-term support
Letโs discuss your project.
Send me a message with your app details , Iโll suggest the best solution quickly.
macOS
iOS Development
Flutter
FlutterFlow
Bluetooth LE
Mobile App Development
SwiftUI
Swift
AI Development
Android App Development
AI Chatbot
React Native
PHP
Node.js
Machine Learning
Firebase
Kotlin
BLEN
Apple Watch
AWS IoT Core
Ravi S.
Chennai, India
$35/hr
5.0
20 jobs
I help indie developers and small startups with their iOS and macOS apps.
WHAT I DO:
โข Build iOS/macOS MVPs for startups (fast turnaround)
โข Debug complex iOS issues (memory leaks, crashes, performance)
โข Fix App Store rejections and handle submissions
โข Maintain and update existing apps (iOS version compatibility, bug fixes)
โข Build new features using Swift, SwiftUI, UIKit
โข Menu bar apps (utilities, timers, quick-access tools)
โข Productivity and automation tools
โข macOS utilities with native look and feel
โข Apps using SwiftUI, AppKit, or hybrid
โข iOS, Swift, SwiftUI Mentoring
WHY ME:
โข 10+ years focused on iOS development
โข 10+ published apps on the App Store (iOS, macOS, watchOS)
โข Led development team for 7 years (Club Operations - acquired by NorthStar)
โข Udemy instructor with 11,000+ students trained
โข Currently building with AI-assisted workflows (3-5x faster delivery)
โข Eye Rest Timer - Menu bar app for the 20-20-20 rule (Mac App Store)
โข Honest Hours - Privacy-first time tracker with auto-tracking
IDEAL PROJECTS:
โข "My app is crashing and I don't know why"
โข "Apple rejected my app, need help fixing it"
โข "I need someone to maintain my iOS app"
โข "Add a feature to my existing app"
โข "I need a menu bar utility for X"
โข "Convert my iOS app to macOS"
โข "Build a desktop tool for my team"
โข "Create a Mac version of my web app"
I respond quickly and communicate clearly. Let's talk about your project.
macOS
iOS
Swift
Objective-C
Firebase
Push Notifications
API Integration
watchOS
iPadOS
React Native
Flutter
SwiftUI
Widget
Native App
Hybrid App
Jitendra R.
Gandhinagar, India
$20/hr
4.7
60 jobs
I build and maintain production-ready iOS and Flutter apps for startups, businesses, and product teams - from new MVPs to complex existing applications.
With 10+ years of mobile development experience, I specialize in Swift, SwiftUI, Flutter, Firebase, REST APIs, app architecture, performance improvements, App Store releases, and integrating complex mobile features.
๐ ๐๐๐ง ๐ก๐๐ฅ๐ฉ ๐ฐ๐ข๐ญ๐ก:
๐ข๐๐ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ
โข Swift / SwiftUI / UIKit / Objective-C
โข MVVM, VIPER and Clean Architecture
โข API and backend integration
โข Firebase and push notifications
โข Core Data / SQLite
โข In-App Purchases and payment integrations
โข Camera and media features
โข Performance and crash troubleshooting
โข App Store Connect and TestFlight
โข Certificates, provisioning and release management
๐ ๐ฅ๐ฎ๐ญ๐ญ๐๐ซ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ
โข Flutter / Dart
โข iOS and Android applications
โข Firebase integration
โข REST API integration
โข State management
โข Existing Flutter application fixes and improvements
โข Production builds and store releases
๐๐ฑ๐ข๐ฌ๐ญ๐ข๐ง๐ ๐๐ฉ๐ฉ / ๐๐๐ ๐๐๐ฒ ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ฆ๐๐ง๐ญ
If you already have an application but are facing crashes, performance problems, outdated code, incomplete features, or difficult maintenance, I can first understand the existing codebase and then recommend the safest approach.
๐๐ก๐ข๐ฌ ๐๐๐ง ๐ข๐ง๐๐ฅ๐ฎ๐๐:
โข Bug fixing and debugging
โข Objective-C โ Swift modernization
โข Architecture improvements
โข Performance optimization
โข API integration
โข UI/UX implementation
โข Feature development
โข App rebuilds and migrations
๐๐ฉ๐ฉ ๐๐ญ๐จ๐ซ๐ & ๐๐๐ฅ๐๐๐ฌ๐ ๐๐ฎ๐ฉ๐ฉ๐จ๐ซ๐ญ
I can also help take an application from development to release, including:
โข Xcode build configuration
โข Signing and provisioning
โข TestFlight
โข App Store Connect
โข App metadata preparation
โข Privacy information
โข Submission
โข Review-related technical fixes
๐๐จ๐ฐ ๐ ๐ฐ๐จ๐ซ๐ค
I don't believe every project needs a complicated architecture or unnecessary technology.
First, I understand what you already have, what is currently blocking you, and what the application needs next. Then I provide a practical implementation plan and work through the highest-priority items.
๐๐จ๐ฎ ๐๐๐ง ๐๐ฑ๐ฉ๐๐๐ญ:
โข Clear communication
โข Practical technical recommendations
โข Clean and maintainable code
โข Attention to existing architecture
โข Fast response
โข Honest estimation
โข Production-focused development
๐๐ฒ ๐๐จ๐ซ๐ ๐ญ๐๐๐ก๐ง๐จ๐ฅ๐จ๐ ๐ข๐๐ฌ
Swift โข SwiftUI โข UIKit โข Objective-C โข Flutter โข Dart โข Xcode โข Firebase โข REST APIs โข JSON โข Core Data โข SQLite โข MVVM โข VIPER โข Clean Architecture โข TestFlight โข App Store Connect โข Push Notifications โข In-App Purchases โข Payment Integration โข CoreML โข ARKit
I have worked on applications across social, community, content, marketplace, business and other product categories.
If you already have an app, send me the current situation, what is not working, and what you want to achieve.
If you're starting from an idea, send me the basic requirements and I can help you determine the right technical approach.
Native App Development
Android App Development
iOS Development
Swift
SwiftUI
Flutter
Product Development
Apple TV Application
AI App Development
Claude
OpenAI Codex
AI Agent Development
Python
AI Mobile App Development
JetPack
Mac OS App Development
React Native
Nikita A.
Noida, India
$20/hr
5.0
16 jobs
๐ Elevate Your iOS, iPhone, iPad, and macOS Development Projects with a Proven Expert! ๐
๐น Over a Decade of Mastery in Crafting Digital Excellence for Apple Platforms
โ 50+ Successful Mobile Apps Delivered for iOS, iPhone, iPad, and macOS
โ 1600+ Hours of Top-Tier Development Across 47+ Projects
โ POS Expert โ Built a custom Point-of-Sale (POS) system for a Canada-based pizza chain, deployed in 125+ stores
๐น Why Choose Me?
โจ End-to-End Development โ From concept to App Store deployment
โจ Agile/SCRUM Pro โ Reliable, iterative, and transparent workflows
โจ Deep Platform Expertise โ iOS, iPhone, iPad, macOS, Swift, Objective-C, SwiftUI
โจ Industry-Specific Solutions โ FinTech, Healthcare, E-commerce, Social Media, POS, and more
๐ My Specializations:
๐ฑ App Development Expertise
โ Social/Dating Apps โ Video/audio chat, real-time messaging (WebRTC, Twilio)
โ E-Commerce & Marketplaces โ Payment gateways (Apple Pay, Braintree), cart systems
โ On-Demand Apps โ Ride-hailing, food delivery, home services
โ Health & Telemedicine โ HIPAA-compliant data, appointment booking
โ Live & Video Streaming โ Low-latency streaming (Agora, ZegoCloud)
โ FinTech & Banking โ Secure transactions, KYC integration
โ Augmented Reality (ARKit) โ Interactive AR experiences
โ POS Systems โ Custom-built for retail, restaurants, and multi-location businesses
๐ก Technical Skills & Tools
Languages: Swift, Objective-C, SwiftUI
Architecture: MVVM, MVP, MVC, Clean Architecture
Backend Integration: Firebase, REST, GraphQL, WebSockets (Socket.IO)
AI & Chat: OpenAI API, ChatGPT, CometChat SDK
Payments: Apple Pay, Stripe, Braintree, Moneris, In-App Purchases
Testing: XCTest, UI Automation, CI/CD (Fastlane, Jenkins)
Security: Biometrics, OAuth2, End-to-End Encryption
๐ง Advanced Integrations
Real-Time Features: WebRTC, Live Streaming, VOIP (Linphone, Sinch)
Maps & Location: Google Maps, Mapbox, Geofencing, Beacons
Analytics & Crash Reporting: Firebase, Crashlytics, New Relic
Push Notifications: Firebase Cloud Messaging, OneSignal
Database: CoreData, Realm, SQLite
๐ฏ Industries Iโve Worked In:
Retail & POS โ Custom checkout systems, inventory management
Food & Beverage โ Delivery apps, POS for restaurants
Healthcare โ Telemedicine, fitness tracking
Finance โ Mobile banking, investment apps
Travel โ Airline & hotel booking platforms
Social Media โ Dating apps, audio/video communities
๐ผ Notable Projects:
โ POS System for 125+ Stores โ Custom-built for a Canadian pizza chain
โ Live Video Social App โ 1M+ downloads, WebRTC integration
โ Banking App โ Secure transactions, biometric login
โ AI-Powered Wellness App โ ChatGPT integration for personalized coaching
๐ฉ Letโs Build Something Remarkable!
Iโm fluent in English and passionate about turning your vision into a high-performance Apple app. Whether you need a startup MVP or a large-scale POS solution, Iโve got you covered.
๐ Get in touch todayโletโs discuss your project!
macOS
iOS Development
iOS
Mobile App Development
Mac OS App Development
Map Integration
VoIP
Push Notifications
Google Maps API
Native App Development
Chat & Messaging Software
Swift
Objective-C
Firebase
Socket.io
Ramneet S.
Chandigarh, India
$18/hr
5.0
43 jobs
๐ Top-Rated Plus iOS Developer with 10+ Years of Mastery ๐ฑ
Published more than 15 big and 28 small Apps on App Store ๐
Innovator in 3D Scanning and ARKit
RoomPlan Api expert
Expert in Objective-C, Swift, SwiftUI, and Dart | Guided by Apple's Design Principles | Adept in Low-Level C-based Libraries | Fluent in Cloud Messaging and Push Notifications | Git, Mercurial, SVN Guru | Ready to Elevate Your Project to the Next Level! ๐
I can provide different levels of quality depending on the current requirement of the project relevant to the industry, starting from very rough proof of concepts, ending with the scalable and maintainable project with automation of delivery (CI/CD) and testing (unit/snapshot/UI tests).
I have a 100 % project complete record with a good Job Success Score and high client recommendations while working as a freelancer.
Thanks for reading. I would love to be considered for your future project! :)
Thank you.
iOS
Mobile App Development
Objective-C
Swift
Ionic Framework
Android App Development
iOS Development
Apple Xcode
RxSwift
Room
iPad App Development
Mac OS App Development
3D Scanning
AR & VR
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