Senior iOS Engineer | 6+ years experience | Senior iOS Developer | Claude Code skills efficient | Eastern US timezone Premium and Beautifully crafted apps for the Apple ecosystem: iOS, iPadOS, watchOS, macOS. Focusing on Swift and SwiftUI to deliver clean, scalable codebase and App Store–ready products that users actually enjoy using. I join as a strong hands-on Senior who can take ownership: • clarifying requirements, proposing the right architecture, and driving the app from idea to launch and beyond. Whether you need a Brand‑new SwiftUI app, a legacy UIKit codebase modernized, or a performance‑critical feature fixed, I make sure the result is robust, scalable, and aligned with your business goals. Technical focus areas: • Swift, SwiftUI, UIKit, Combine, async/await, MVVM, MVC, VIPER, Clean Architecture • REST API integration, JSON, authentication, push notifications, in‑app purchases, App Store deployment, TestFlight with CI/CD • Performance optimization, memory management, smooth animations, offline storage (Core Data), WebKit/WKWebView and JavaScript bridges Hardware and system integrations: • Bluetooth/BLE, watchOS, iPadOS/macOS adaptations How I work: • Product-oriented: I care about user experience, not just code quality. • Proactive Communication: clear updates, async-friendly collaboration, documented decisions. • Reliable: I respect deadlines, own problems, and stay involved through release, bug fixing, and maintenance. If you need a reliable Senior iOS Developer to lead or strengthen your mobile app, let’s talk about your product, current challenges, and what success looks like for you. Keywords: Swift, SwiftUI, UIKit, iOS Development, Clean Architecture, MVVM, MVC, VIPER, REST API Integration, JSON, Push Notifications, In-App Purchases, App Store Deployment, Performance Optimization, Memory Management, Animations, Core Data, Auto Layout, Combine, Async/Await, Git, Agile, TestFlight, Bug Fixing, App Maintenance, macOS, tvOS, Remote Work

I’m a Senior Mobile App Developer with 8+ years of experience building high-performance mobile apps for iOS and Android. I specialize in native iOS development using Swift, SwiftUI, and Objective-C, native Android development using Kotlin and Java, and cross-platform development with Flutter, FlutterFlow, and React Native. I hold a Master’s degree in Information Technology and can handle the complete app development lifecycle, from planning and architecture to development, testing, deployment, and App Store / Play Store release. What I Bring to Every Project * Full app lifecycle ownership, including planning, architecture, development, testing, and store release * 8+ years of native iOS development experience for iPhone and iPad * Native Android development using Kotlin and Java * Cross-platform app development with Flutter, FlutterFlow, and React Native * Clean and scalable architecture using MVVM, MVC, Clean Architecture, RxSwift, RxFlow, and RxCocoa * AI-assisted development using Cursor AI, Replit, Lovable, and Codex AI * Strong focus on performance, clean code, user experience, and long-term maintainability Backend and Cloud Experience * Firebase, Firestore, AWS Amplify, and GraphQL * RESTful API integration * Core Data, Realm, and SQLite * Crashlytics and Fabric for crash reporting and app monitoring Payments and Commerce * Stripe, Apple Pay, Google Pay, PayTabs, and PayPal integrations * In-App Purchases for subscriptions, consumables, and non-consumables on iOS and Android Maps, Hardware, and Connectivity * Google Maps, MapKit, and Mapbox * BLE, IoT, and UWB / U1 Chip integrations * Apple Nearby Interaction framework for proximity-based iPhone-to-iPhone experiences * Apple Screen Time APIs, including FamilyControls, DeviceActivity, and ManagedSettings * QR code scanning * Push notifications using Firebase Cloud Messaging, Notifee, and APNs Integrations and Tools * Social login integrations including Facebook, Google, Twitter, Instagram, and more * Data visualization using HighCharts and Charts * Git, Bitbucket, GitLab, and Sourcetree * CI/CD setup and maintenance using Fastlane, Bitrise, and GitHub Actions Whether you need a native iOS app, native Android app, Flutter or FlutterFlow app, React Native product, legacy app modernization, or complex enterprise integration, I can help you build a reliable and scalable mobile solution.

Hey! I'm an expert mobile application developer, with the only passion to design attractive and eye-catching mobile application with the out of box ideas. I am providing the following services: - iOS (Swift / Objective-C) - Android (Kotlin / Java - OOP, FRP, Protocol Oriented Programming, Reactive Programming - Architecture Patterns: MVC, MVP, MVVM, Viper, Clean Swift, RxSwift - 3rd party frameworks for iOS - Understanding & ability to leverage iOS features - Fitness & Social Media App - JSON, REST API - Push notifications - Complex animations & responsive UI - Build chat applications - Git (Github / Gitlab / Bitbucket) - CloudKit, Firebase, Realm, CoreData, SQLite - iOS SDK - iBeacons / Bluetooth / IoT Mobile Apps - Geolocation & Maps - Agile Methodology (Jira) - Friendly, Flexible, Punctual, and Professional - Fluent English  

I’m a senior mobile app developer with 10+ years of experience building high-quality, scalable applications for iOS and Android. I specialise in native iOS development (Swift, SwiftUI), native Android development (Kotlin, Java), and cross-platform apps using Flutter (Dart). My focus is on delivering fast, intuitive, and reliable apps with an excellent user experience across all platforms. I’ve successfully delivered 50+ mobile applications to the Apple App Store and Google Play Store, working with clients worldwide. My experience spans multiple industries, including finance, healthcare, e-commerce, social media, and travel. I manage the entire development lifecycle, from idea validation and UI/UX design to development, testing, and final store deployment, ensuring smooth and successful launches. ________________________________________ Technical Expertise • Native iOS development (Swift, SwiftUI) • Native Android development (Kotlin, Java) • Cross-platform development using Flutter (Dart) • Firebase (Auth, Firestore, Cloud Functions, FCM) • Real-time features, push notifications, and authentication • RESTful & GraphQL API integration • Third-party SDKs (payments, maps, analytics, social logins) • Architectures: MVC, MVVM, Clean Architecture • Scalable, maintainable, and performance-optimised code ________________________________________ As a full-cycle developer, I design intuitive user interfaces, write clean and efficient code, and perform thorough QA testing. I follow SOLID principles and clean architecture to ensure long-term maintainability, high performance, and scalability. I also optimise apps for speed, memory usage, and stability, even as user demand grows. I guide clients through App Store and Google Play deployment, ensuring full compliance with platform guidelines. ________________________________________ How I Work • Professional, reliable, and transparent communication • Close collaboration at every project stage • Regular progress updates and feedback cycles • Experience with startups, agencies, and enterprises • Flexible with workflows and team structures • Strong commitment to deadlines and budgets • Long-term partnership mindset focused on trust and quality ________________________________________ If you’re looking to build a high-quality mobile app that delivers real business value. let’s discuss your project and bring your vision to life.

I'm a senior iOS & Android developer with a Master Degree in Computer Science. I have 11 years of experience for designing and developing efficient, high-performance, user-friendly mobile applications. I have extensive experience working with a variety of different industries and businesses. I was ranked No.1 in "Apple cocoa programming test" in Upwork among 1200 test takers. I have developed over 80 apps in 10 years. The most popular application I've created is Wysa, which was downloaded more than 1 million times from ios App Store Store and Google Play, with average rating 4.7 , based on more than 24.000 reviews. Development Specialities & Experience: • iOS SDK (3.x-13.x), Swift/Objective-C, Cocoa Touch, CoreAnimation, CoreData, CoreLocation, CoreImage, Audio Framework; • watchOS (1.x-6.x), tvOS SDK (9.x-13.x) • Backend (Vapor 3.x) • Google Map Service, SLC, OpenStreetMap SDK, Yandex Map SDK; • Realm, Parse, BaasBox, Deployd, DreamFactory, REST, Socket, SQLite, JSON, XML, • Social networks API: Facebook, Twitter, LinkedIn, Instagram, Google+, Tumblr, Foursquare, Flickr, Weibo, Wechat; • CocoaPods, Carthage, SPM; • MagicalRecord, Alomofire, AFNetworking, ReactiveCocoa, RxSwift, Moya/RxMoya, ObjectMapper, SwiftyJSON; • Unit test: Quick, Nimble; • Flurry, TestFlight, Fabric/Crashlytics, iAd, Analytics, Admob, Push Notification, In-App Purchase;

I am a Senior iOS Developer, I architect and deliver production grade iOS apps with 4+ years of focused experience in Apple’s ecosystem, I lead the development of apps from zero to App Store launch, rebuild unstable codebases and implement complex features spanning subscriptions, AI integrations, real-time systems and advanced native capabilities. 𝗖𝗼𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: • Native iOS development with Swift, SwiftUI, UIKit, and Objective-C. • Architecture design: MVVM, Clean Architecture, modular systems, scalable state management. • Concurrency and performance optimization using async/await, GCD and efficient threading models. • Building complex UI systems with smooth animations, adaptive layouts, and pixel perfect implementation. • Robust networking layers, API integrations, caching strategies, and offline resilience. 𝗜 𝗵𝗮𝘃𝗲 𝘀𝘂𝗰𝗰𝗲𝘀𝘀𝗳𝘂𝗹𝗹𝘆 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 𝗶𝗻𝗰𝗹𝘂𝗱𝗶𝗻𝗴: • AI-powered apps with complex backend integrations • Subscription-based platforms with reliable monetization flows • Real-time and media-heavy applications • MVPs that evolved into production products • Complete rebuilds of unstable or poorly structured apps 𝗛𝗲𝗿𝗲'𝘀 𝘁𝗵𝗲 𝗿𝗼𝗮𝗱𝗺𝗮𝗽 𝗳𝗼𝗿 𝗯𝗿𝗶𝗻𝗴𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝘁𝗼 𝗹𝗶𝗳𝗲: • Grasp project requirements thoroughly • Design the user interface of the application • Implement essential functionalities • Comprehensive testing • Submitting your app for launch When you collaborate with me, you can expect nothing less than meticulous attention to detail, a deep understanding of project requirements and a relentless drive for excellence. From concept to launch, I am dedicated to bring your vision to life with unparalleled creativity and precision.

Hands-on mobile app developer with more than 10 years experience. Capable of deciding which architecture to use on specific project and love to give opinion plus suggestion if needed. Have advantage than other flutter's developer since I've have native language skill (Swift, Kotlin, Objective-c, Java). Love to explore various framework and technology to serve the app with better performance so that customer will experience smooth buttery app.

I'm a passionate iOS developer with a strong focus on Swift, SwiftUI, and UIKit. With a proven track record of delivering high-quality apps, I'm well-versed in Core Data, Firebase, and other cutting-edge technologies. 🎯 What I Offer: ● Proficient in Swift, SwiftUI, and UIKit ● Extensive experience in building feature-rich iOS apps ● Solid understanding of 3rd party API integration, trade-offs and possible concerns ● Meticulous attention to detail, code optimization and performance enhancements ● Collaborative team player with excellent communication skills 💼 Past Achievements: ● Developed and launched several successful iOS apps. ● Optimised app performance, resulting in improved user experience. ● Refactor's that improved performance across the board and reduced app size. ● Modularised apps ensuring reusability across multiple apps. ● Collaborated with cross-functional teams to deliver outstanding results. If you're looking for an iOS developer who can bring your app ideas to life and elevate your business, let's connect! I'm committed to creating top-notch iOS applications that exceed expectations.

If you have a business idea and you want to convert it into a mobile application, I would like to help you. I have 12+ years of experience in mobile app development. Expert in Swift, SwiftUI, Objective-C and Flutter. Please check the client's feedback: "It was a pleasure to work with Shrejash! He demonstrated his expertise in iOS; showed strong initiative on the project; excellent in communicating progress and presented any questions quickly so we could meet our deadline. He was always available when we needed him, and transparent when he had questions or issues. The app he built was produced exactly to the specifications – nothing missing, and each part thoroughly tested and polished. I would happily hire him again." Following are some kinds of projects that I have successfully completed:- - Product-based - E-commerce - Photo and Video - GPS based apps - Social networking apps - Enterprise apps - Medical apps - Utility apps My strong points: - Strong written and verbal English - Sound technical knowledge - Great communication skills - Top rated developer on Upwork - Very good reviews by clients

With 12+ years of experience, I am an expert iOS Engineer who specializes in developing mobile applications using both Swift and Objective-C for the Internet of Things (IoT), social networks, video processing/ streaming, and other industries. I have a deep understanding of the iOS ecosystem, and Apple frameworks such as UIKit, SwiftUI, Core Data, Combine, and others. I have a good understanding of the software development process, from requirements gathering to deployment. I can expertly lead and mentor teams of engineers to deliver projects on schedule, within budget, and to a high standard. I have a passion for creating user-centric apps that are not only functional but also easy to use and intuitive. With more than 40 projects completed both individually and as a member of other teams, I have a proven ability to develop and implement effective solutions to technical challenges and to work with cross-functional teams to deliver projects on schedule and within budget. I am always looking to improve my skills and stay current with the latest developments in the field. EXPERTISE: - Programming Languages: Objective-C (8y), Swift (6y); - Technologies: UIKit, SwiftUI, Combine, CoreData, CoreLocation, Social, MediaPlayer, AVFoundation, GraphQL, SQLite, HomeKit, OAuth, WebSockets - App architectures: MVVM / MVC / MVVM-C / VIPER / TCA; - Development Tools: Xcode, Reveal, LLDB; - Bug tracking: Xcode Tools, Jira, Google Analytics, Flurry, Crashlytics, HockeyApp; - Unit testing: XCTest, Quick/Nimble; - 3rd party frameworks: Alamofire, Realm, Firebase, RxSwift, GRDB, others My experiences include building: - complex social network projects - iOS and Mac OS utility apps - indoor navigation - iBeacon / Eddystone integrations - audio/video streaming applications - IoT / smart home device integrations with Bluetooth / WiFi connectivity