✅ Free consulting for 15 minutes to discuss requirements & solve technical aspects. ✅ Unlock a better mobile app experience. Leverage our 12+ years of tech expertise! Deep Mobile Development Expertise: React Native development principles and best practices. Adept at creating reusable and maintainable components. Familiar with native bridging techniques for integrating native functionalities. Skills: React Native CLI, React Native Expo, Typescript, Javascript, Briding with native code, Redux, Rematch, Reanimated Native iOS Development: Strong understanding of the Apple ecosystem. Experience with ARKit, UIKit, SceneKit & more SDK for building augmented reality experiences. Skills: Swift, SwiftUI, Objective-C, Watch App, Mac Catalyst Native Android Development: Solid knowledge of Android development using Java and Kotlin. Additional Skills & Technologies: • Backend: Node.js, Express, Core PHP, GraphQL, RESTful APIs, React JS • Unit testing, functional testing, and UI testing frameworks for React Native, iOS, and Android apps. • Familiarity with tools for continuous integration and continuous delivery (CI/CD) like Jenkins, CircleCI, or Bitrise. • Experience with mobile development concepts like navigation, handling different screen sizes, and user experience (UX) design principles. • Knowledge of GPS, Google Maps, and Location Tracking for mobile apps. • Experience with chat functionalities using XMPP, Sockets, or Firebase. • Integration of payment APIs like Stripe, Paypal, Braintree, and Apple Pay. • Implementation of in-app purchases, advertisements, and push notifications using GCM and Google Analytics. • Familiarity with social integrations for Facebook, Twitter, YouTube, Instagram, etc. • Understanding of eCommerce platforms like OsCommerce and Magento APIs. • Knowledge of databases like MySQL, MS SQL, SQLite, and Core Data. • Strong QA and application UI/UX skills. Code Controls: Github, Bitbucket, Gitlab Project Management: Agile, Basecamp, Trello, Jira ▶️ 𝗪𝗵𝗮𝘁 𝘆𝗼𝘂 𝗰𝗮𝗻 𝗲𝘅𝗽𝗲𝗰𝘁 𝗳𝗿𝗼𝗺 𝘄𝗼𝗿𝗸𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝗺𝗲? ✅ Trust ✅ On-time delivery ✅ Great communication level ✅ Daily Updates ✅ Regular Scrum ✅ Long-term relationship (which is very important for me) By showcasing this comprehensive skill set, demonstrate the ability to excel in both native and cross-platform mobile development. This makes me a valuable asset for any mobile development team. Keywords: React Native, Mobile App Developer, iOS, Android, Cross-Platform, UI/UX, Agile, CI/CD, Redux, Navigation, ARKit, E-commerce, Social Media, On-Demand, Chat, Location, Firebase, Stripe, MVP, Flutter, Blockchain, Machine Learning, AI.

I have been doing iOS Application development for the past 12+ years, I have plenty of experience and a great eye for software development. Having good knowledge on Swift and Objective C Programming, Developing and designing the Apps for iPhone/iPad. Expertise in developing app using SwiftUI and Swift Concuurency. Solid understanding of object-oriented programming. SKILL: User Interface: Using SwiftUI & UIKit. Layout: Using Geometry Reader, Stacks (Vstack, HStack, ZStack), Auto-layout, Auto Resizing, Animation: Rotate, Scale, tansform & Transition. Backend: Firebase, GraphQL, REST API, AWS Amplify, Realm Location: MapKit, CoreLocation, Mapbox Chat App (using): XMPP, QuikBlox, Firebase, Realm Apple services: Push notification and In app purchase and App submission. Payment SDK: RevenueCat, Stipe and Braintree. Social API: Facebook, Twitter, Instagram. Message API: Twillo. Email API: Mailgun, SendGrid. AWS: S3, Cognito, Amplify, DynamoDB. Database: CoreData, GraphQL App Extension: Keyboard, Share, Action and iMessage. Drawing: CoreGraphics and CoreAnimation photo/video/audio/voice related App. AR: ARKit 3D: SceneKit. ML: CoreML, CreateML, Apple Vision framework Tools: Xcode, Figma, Notion, Jira, Slack, Trello, Confulence. STRENGTH: - Development of application using MVC, MVVM, Redux and MVP pattern. - Development of application following Design pattern like Singleton, Factory, Observer, State, Adapter, Composite, etc. - Proficient understanding of code versioning tools such as Git. - Understanding of Continuous Integration. - Understanding of memory management and multi-threading. - Knowledge of Unit Testing with Xcode. - Knowledge of Apple’s human interface guidelines.

For the past 4 years, I've been crafting iOS apps as a freelancer. As a developer I bring to the table not only my skills, but care and commitment to project. I am a graduate in Computer Science and I use my educational background to keep learning about my field. I started iOS Development during my studies and till then I have developed more than 10+ applications on my own, which helped me to understand about iOS more deeply. I also work on 2 or 3 big projects spanning over 3 to 4 months time period. Though I am new to Upwork but I can handle all about the iOS Development. In my recent projects I work on the following fields - - XMPP Framework, AVAssetWriter, Camera - HLS Streaming, Maps, Screen Recording - Git, DevOps - Realm, Core Data, GRDB(SQLite), Alamofire - Twilio iOS Integration - Implementing pixel perfect UI Design These are some recent things I worked on, you can reach me to get work done on anything in iOS. I hope to hear from you soon. Good day!

I am a software developer working as a software developer/ architecture in chat related products. I have started my experience with Accenture and now i am continuing as an independent freelancer/consultants. I am working with xmpp server since more than 4 year and listed to top 15 solution and custom plugin developer for an open source xmpp server Openfire. I have worked closely with Ejabberd server which was initially used by whatsapp. Having working experience of this server for this many years i can modify xmpp module as per custom needs and add a new api to satisfy each and every custom needs. I have developed many Chat applications based on XMPP, FCM having following features. - One - One chat. - Group Chat. - Broadcast Chat. - Text Message,Media message(text,image,audio,video,location,RIch URL,Documents),Edit,Delete,Delete for all. - Apple apns notification and FCM messages. - Sharing contest from the third party apps. - Secret Chat. - Task /Topic Management - All other standard Group management functions. - VOIP based audio/video calling. - Data Notification with doze mode. I have good experience of writing the unit test for better and speedy diagnosis and better development testing with following good java doc comments which is very useful while working with a team and better documentation. I do have experience of SQL database as well as NO-SQL database and having used this both client and server side so i better know the advantages/disadvantages and how to deal with the limitations. I have developed quality applications with CI/CD and automation build and publishing tools. I managed all the concerns about security, battery consumption, memory management, notification management in chinese products. Most of my chat applications has implemented E2E Encryption with OMEMO for better privacy control for chat messages. Many of my application is live on respected store which is listed below are a few of them. I have developed more than 100 applications in Mobile (Android/IOS), Desktop (Windows/Linux/Mac) and web applications for the different industries and their links such as; -- Instant Messaging/ Voice/ Video calling (WhatsApp/Telegram/Wechat) -- Food Delivery (UberEats/Swiggy) -- Cab booking apps (Ola/Uber) -- Hospital management (Doctor/ Patient appointment schedule) -- Booking system (Movie ticket booking / Postpaid/ Prepaid Recharges) -- Wallet management (Fund Transfer / Pay using wallets) -- Fantasy games (Dream11/ Sorare) -- Crypto based NFT minting platforms -- Dating apps (Tinder/ Bumble) -- Social media apps (Tiktok/ Facebook) -- Media streaming apps (Netflix) -- Fitness Apps 1 ) Okdone chat 2 ) Chatmaite sport bot 3 ) Wibrate 4 ) Bingoo Chat 5 ) Learnx Thanks, Khush Dobariya

I’m a Senior Mobile & Backend Engineer with extensive experience building high-performance, scalable applications end-to-end — from mobile UI to backend architecture and production deployment. I specialize in delivering robust, production-ready solutions across iOS, Android, and cross-platform environments, backed by reliable and scalable server-side systems. Mobile Development: Native iOS: Objective-C, Swift, SwiftUI Android: Kotlin Cross-platform: Flutter, React Native Backend & Infrastructure: Backend: Node.js, Express.js, Python Databases: MongoDB, PostgreSQL API design: RESTful services, scalable architectures DevOps: Docker, containerized environments, deployment pipelines AI Integration: OpenAI API, LLM-powered features (content generation, automation, smart workflows) End-to-end ownership: from idea → architecture → implementation → production Strong problem-solving mindset and attention to edge cases Production experience with monitoring, debugging, and performance optimization Ability to quickly understand business needs and translate them into reliable technical solutions Typical Projects I Deliver: Full-stack mobile applications (iOS/Android + backend) Scalable APIs and backend systems for mobile apps AI-powered features (smart content generation, automation, intelligent UX flows) App performance optimization and refactoring legacy codebases Feature development with clean, testable architecture MVP development with a strong foundation for scaling

*** TOP RATED PROFILE *** *** 100% Job Success Ratio *** *** 5 Star Client Feedback *** *** 8+ years of Experience *** 👋 I have developed 40+apps from scratch, and I have 8+ years of experience in mobile application development For me - the best code is an art piece made with accuracy and enthusiasm. I will make your app world-class quality as I have developed many Successful Apps for Android and flutter over the past eight years. Why should you work with me? ✅ Mobile platforms: - Android - iOS - React native - Flutter ✅ MY RESPONSIBILITY: • World-class quality and experience • Full Responsiveness • Material UI Design • Native Optimization and Performance • Perfect for MVVM and MVP • 24/7 available • On-time project delivery • Cost-effective approach ✅ WHAT I CAN DO: ✔ Planning and implementing the app’s architecture and features. ✔ Writing apps from the very beginning to the Play Store and further support. ✔ Server backend API and Web admin panel for the project ✔ Fixing and supporting the apps written by others. ✔ Working with a team of developers or solo. ✔ Providing maximum customer satisfaction. 5/5 stars for all jobs. ✅ EXPERTISE: ♦ Android : Java/Kotlin, C/C++, Android Studio, SDK, NDK ♦ Flutter ♦ MVVM, MVP architecture with Dependency Injection with a dagger, Koin, data binding ♦ REST API - Retrofit, Volley, Gson, JSON or XML ♦ Database: Room, Realm, SQLite ♦ Social: Facebook, Twitter, LinkedIn, Instagram, Youtube ♦ Ads: Google Admob, Chartboost, Adcolony, Facebook ♦ Push notification: Firebase, Onesignal ♦ Map SDK: Google Maps and MapBox ♦ Analytics: Google Analytics, Firebase Fabric ♦ Payment Integration: Stripe, Paypl ♦ Chat: Socket.io, XMPP ♦ Image Loading: Glide, Picasso, UIL, Fresco ♦ GIT: Gitlab, Github, Source tree ✅ SERVICE I PROVIDE: ♦ CREATING APP FROM SCRATCH: If you need an app. ♦ PRE/POST LAUNCH Support: ♦ UPDATING + BUG FIXING FOR EXISTING APP: If you need to add new features. *HOURLY CONSULTANCY: If you need some advice. Your Success Is My Success! ________________________________________________________ Note: Because of NDA, I've added a few items only to the portfolio. Please ask me about the other work which I can't showcase.

Hi, I'm George. In work with me, all your projects will be the best! First of all see my app in AppStore! Developer - Efimenko George or See portfolio And that's how I achieve it: - I'm native iOS developer with 4 year experience. During this time, I developed many applications for iOS, written in Swift or Objective-C. - All applications are designed from scratch personally by me. I develop the internal architecture of applications, their design, which corresponds to the trends and guidelines of Apple, UX and so on. All this allows me to eventually develop the best application in any field! My words are confirmed by my projects in the portfolio. Please be free to view this section. My Skills: ✔ Objective-C, Swift ✔ Developing augmented reality app using ARKit ✔ Creating app design: Sketch, Photoshop ✔ Creating UI with Storyboards, XIB or code-made UI ✔ Creating of any custom Views/Buttons/Controllers ✔ Using reactive programming: RxSwift, ReactiveCocoa ✔ Connect in-App Purchase with receipt confirmation, or other payments ex. Stripe ✔ Database: Realm, CoreData ✔ Social network integration: Vk, Facebook, Twitter, Instagram, etc ✔ Chatting protocol: XMPP ✔ Video protocols: WebRTC ✔ Geolocation services: GPS, Google Maps, Yandex Maps, OpenStreetMap or other ✔ Version control: Git ✔ Analytics services: Flurry, Google Analytics, Mixpanel ✔ Distributing and crash reporting services: TestFlight, HockeyApp, Crashlytics ✔ Back-end development: RESTful web services, Firebase Working with me is not like working with the rest of the programmers, check it out for yourself.

I am Full Stack mobile application developer with 13+ years of experience in developing Android, iOS and React-Native applications. My focus is to provide my clients with end to end solutions from your idea till your applications published in App Store or Play Store. I believe in quality work and good relations with my clients so it is in my top priority to provide 100% client satisfaction, bug free Fully functional app fulfilling all UI/UX constraints, 1 month free client support if any issue came up, Clean and Well documented code and daily or weekly status updates to my clients.

-I provide Rapid App & Web Development services through clickable prototypes #1. Wireframing #2. Clickable Prototypes #3. Graphic Mockups #4. Proof-of-Concept #5. Seamless Design Communication #6. App Workflow Simulation #7. Improving UX ----Next generation on-demand services---- -Taxi Services -Doctor on demand -Food Ordering -Laundry -Grocery -Parking -Pet care -Beauty/Salon -Home Services -House Cleaning -Coaching / Tutors -Fitness -Logistics -Wine / Alcohol Delivery -Repair and maintenance -Courier / Package Delivery -Domains I work with :- -Multimedia Apps -VoIP Apps -Enterprise Apps-Social Networking -Location Based Apps -Wearable / IoT Apps -AR / VR Apps -iBeacon Applications
-E-Commerce Apps -Utility Apps -Chat Applications -Business Applications -NEWS Applications -Weather Applications -Health & Fitness Applications -NFC Applications - iOS / iPhone / iPad / Apple TV / Apple Watch Apps -Swift -Objective - C -Touch ID -iBeacon -Apple Watch  -Apple TV -Xcode 9 -Cocoa Touch -iMessage App -In App Purchase -CocoaPods -Core Data -AFNetworking -Alamofire -3D Touch -SiriKit -HealthKit -CallKit -Android / Java / Kotlin Apps :- -Java -Android Nougat -Android Wear -Android View Animations -BLE Device Integration -Android TV -Android Launcher Apps -Fitness Tracker -Web Services :- #1 SOAP #2 XML #3 JSON #4 AJAX -PHP Frameworks :- -Laravel -Cake PHP -Yii -Zend -CodeIgniter -CMS :- -Wordpress -Drupal -Magento -Stellar design + strategic thinking 
lead to pixel perfect screens #1 Front - end Development #2 Interface Designs #3 Experience Designs #4 Custom Web Designs #5 Responsive Layout #6 Mobile UI / UX Multi-Disciplinary Project Development :- #1 Sketching Your Idea #2 Analysis & Prototyping #3 Design: User Interface (UI) & User Experience (UX) #4 Development & Implementation #5 Beta Testing and Quality Assurance #6 Deployment & Final Launch I'm ready to Get Started! Share your idea with Me

Resume: My name is Phuc. Dedicated and experienced with over 14 years of experience in software development and software testing. Worked on desktop, web and mobile applications, especially within the iOS, MacOS, Android and Flutter ecosystems. I have participated in numerous technology projects for international clients in the United States, Singapore, Japan, and South Korea - ranging from large corporations to dynamic startups. Coming from a solid background in software engineering, I am not only masters programming languages such as Swift, Kotlin, Dart, and C/C++, but also possesses a clear understanding of system architecture and modern development models including MVVM, Modular, and Clean Architecture. Additionally, I have extensive experience with IoT, BLE technologies, and AWS-based solutions for smart device connectivity and system performance optimization. I had held key technical roles such as Mobile Team Leader, iOS Lead, and core team member at companies like Jobhopin, Floware, Zillearn, and Livescribe – where I directly developed and launched real-world applications now available on the App Store and Google Play across multiple countries. I had also managed development teams of up to nine members, effectively leading both technical execution and agile workflow processes within Scrum environments. Below are some of my notable real-world projects: • Livescribe and Anoto SmartPen – transforming handwritten notes into digital content. • Zillearn and Kydon EdTech – a skill-based learning platform in Singapore. • Inspectorio – a global quality inspection platform. • Jobhopin – an AI-powered smart recruitment platform In parallel with my product development journey, I was also an experienced iOS and Flutter instructor, with the mission of sharing not only programming techniques but also product development mindset – something I have cultivated through years of hands-on collaboration with international product teams * Education: • Degree Danang University of Technology, Danang City, Vietnam, 2006-2011 • Degree Software Engineering Boot-camp at Enclave, Danang City, Vietnam, 2011 • iOS teacher at IMIC technology, HCM city, 2019 - 2020 • Flutter teacher at IMIC technology, HCM city, 2022 * Professional Achievements: • I had eight years working on iOS developer • I had two years working on Android developer • I had one year working on Java automation testing • I had one and a half years working on PHP developer • I had one half of a year working on Adobe Flash Player * Skills: • Good at English • iOS (Objective C, Swift, iOS Framework, Cocoa Pod framework), Xcode 5.x + • Android (Java, Kotlin) • Flutter • C/C++ • AWS, AWS Amplify, AWS Cognito, AWS DynamoDB, AWS GraphQL • React Native Expo, Typescript • Selenium, TestNG • PHP, Drupal, HTML, Javascript • NativeScript, Angular, Typescript • SQL, MySQL, SQLite, Core Data, Realm • JSON, XML • Eclipse3.1 +, JUnit • IoT (RFID, iBeacon, BLE) • Architectural Pattern (MVVM, VIPER, VIP, Modular) • Security Algorithms (RSA, AES) • Git, Gitlab, SVN