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🅷🅴🆈 👋 Hi! I’m a veteran full stack developer, mobile app developer, and team lead leading a senior long-term team capable of taking products from idea → launch → scale → maintenance. I’ve been in professional software development for 25+ years and mobile app development for 17+ years, delivering scalable iOS Development, Android App Development, Flutter, React Native, and backend-driven platforms across startups, SaaS products, enterprises, and high-growth mobile ecosystems. Clients usually come to us when they need more than just coding - they need a technical partner who understands architecture, business logic, scalability, monetization, and long-term product growth. As a mobile application developer, ios developer, android developer, flutter developer, and full stack developer, I specialize in building high-performance native and cross-platform mobile apps used by millions of users worldwide. I work with native iOS development using Swift, SwiftUI, UIKit, and Objective-C, native Android development with Kotlin and Java, as well as Flutter, React Native, and hybrid app development for scalable cross-platform delivery. Over the years, I’ve helped build 700+ apps across fintech, healthcare, social networking, education, entertainment, e-commerce, IoT, and enterprise SaaS. My experience covers the full mobile app development lifecycle - system architecture, UI/UX implementation, backend development, API Integration, DevOps, deployment, scaling, optimization, and long-term product evolution. 🏆 Why Clients Choose Me ✔️ 25+ years as a full stack developer and software architect
 ✔️ 17+ years in mobile app development
 ✔️ 700+ mobile apps delivered across iOS, Android, Flutter & React Native
 ✔️ Expertise in native app development, hybrid app development, and scalable backend systems
 ✔️ Reduced crash rates by up to 70% and improved app performance by 50% on production apps
 ✔️ Built mobile platforms used by 5M+ users worldwide
 ✔️ Strong experience with Mobile App Improvement, Mobile App Bug Fix, and modernization projects
 ✔️ Long-term experience with startups, SaaS companies, enterprises, and Fortune 500 clients
 ✔️ Full-cycle delivery: architecture → development → deployment → scaling → support 📱 Native iOS & Android Development • Native iOS Development with Swift, SwiftUI, UIKit, Combine, Objective-C • Native Android App Development with Kotlin, Java, Jetpack Compose • Smartphone app optimization for performance, UX, and scalability • Clean Architecture, MVVM, VIPER, modular app structures • Device integrations: BLE, GPS, biometrics, camera, sensors, HealthKit, Google Fit • App Store & Google Play deployment pipelines • Multi-language apps with localization and accessibility support • Advanced performance optimization and memory management 🔁 Cross-Platform & Hybrid App Development • Flutter developer expertise for scalable cross-platform products • React Native development with custom native module integrations • Kotlin Multiplatform Mobile (KMM/KMP) • Shared business logic across iOS and Android • Adaptive UI systems and responsive mobile layouts • Cross-platform architectures reducing development time by 40–60% 🔧 Backend, API Integration & Infrastructure • REST API and GraphQL API Integration • Firebase, Node.js, PHP, and scalable backend services • Authentication systems, caching, offline sync, token management • SQLite, Room, Realm, Core Data • Push notifications: FCM, APNS, OneSignal • Real-time chat, geolocation systems, dashboards, and live data platforms • Backend-connected mobile ecosystems with scalable cloud infrastructure ⚙️ DevOps, CI/CD & Delivery • Fastlane, GitHub Actions, Bitrise, Firebase App Distribution • Automated testing and deployment pipelines • Beta testing, crash analytics, staged rollouts • CI/CD optimization for faster and safer release cycles • AWS and scalable cloud deployment workflows 📊 Analytics & Monetization • Firebase Analytics, Mixpanel, Amplitude, Google Analytics • In-app purchases, subscriptions, AdMob, Facebook Ads • Retention optimization and funnel analytics • Data-driven product iteration and growth optimization 🔌 Advanced SDK & Hardware Integrations • AVFoundation, CameraX, Core Bluetooth, Core Motion • Stripe, Twilio, Agora, Sendbird, Mapbox, OpenCV • IoT dashboards, BLE integrations, voice/video systems • Camera-heavy and sensor-based mobile applications 🌍 Industries Served • Fintech & Banking • Healthcare & Fitness • E-commerce & Retail • Smart Home & IoT • Education & E-learning • Social Networking • Travel & Hospitality • Entertainment & Media • SaaS & Enterprise Platforms ✅ Let’s Build a Mobile Product That Scales!

Hi there! 👋 I’m a Full-Stack Mobile App Developer helping startups, founders, and businesses turn app ideas into clean, scalable, and launch-ready products. 𝐈 𝐬𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐞 𝐢𝐧 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐬, 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐚𝐩𝐩𝐬, 𝐌𝐕𝐏𝐬, 𝐒𝐚𝐚𝐒 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬, 𝐰𝐞𝐛 𝐚𝐩𝐩𝐬, 𝐝𝐚𝐬𝐡𝐛𝐨𝐚𝐫𝐝𝐬, 𝐚𝐧𝐝 𝐛𝐚𝐜𝐤𝐞𝐧𝐝 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐮𝐬𝐢𝐧𝐠 𝐅𝐥𝐮𝐭𝐭𝐞𝐫, 𝐑𝐞𝐚𝐜𝐭 𝐍𝐚𝐭𝐢𝐯𝐞, 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐅𝐢𝐫𝐞𝐛𝐚𝐬𝐞, 𝐒𝐮𝐩𝐚𝐛𝐚𝐬𝐞, 𝐌𝐨𝐧𝐠𝐨𝐃𝐁, 𝐌𝐲𝐒𝐐𝐋, 𝐚𝐧𝐝 𝐭𝐡𝐢𝐫𝐝-𝐩𝐚𝐫𝐭𝐲 𝐀𝐏𝐈𝐬. Whether you have a fresh app idea, an existing app that needs improvement, a messy codebase that needs cleanup, or a product that needs new features, I can help you plan and build it the right way. ⭐ 𝐖𝐡𝐚𝐭 𝐈 𝐁𝐮𝐢𝐥𝐝 ✅ iOS and Android mobile apps ✅ Flutter and React Native applications ✅ MVPs for startups and founders ✅ SaaS platforms and subscription-based apps ✅ AI-powered apps, chatbots, and automation tools ✅ Web apps, dashboards, and admin panels ✅ Backend systems and API integrations ✅ Wrapper apps, WebView apps, and Base44-style app builds ✅ Payment gateways and third-party integrations ✅ App Store and Google Play deployment ⭐ 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 ✅ Mobile: Flutter, React Native, iOS, Android ✅ Frontend: React.js, Next.js, JavaScript, TypeScript ✅ Backend: Node.js, Express.js, REST APIs ✅ Databases: Firebase, Supabase, MongoDB, MySQL ✅ AI & APIs: OpenAI API, Gemini, AI chatbots, automation tools, third-party APIs ✅ Tools: Figma, GitHub, Bitbucket, Postman ✅ Deployment: Apple App Store, Google Play Store, Firebase Hosting, cloud platforms ⭐ 𝐇𝐨𝐰 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 ✅ Turn your app idea into a launch-ready MVP ✅ Build clean and scalable mobile apps for iOS and Android ✅ Create dashboards, portals, admin panels, and backend systems ✅ Add AI features, chatbots, automation, payments, and API integrations ✅ Convert Figma designs into fully functional mobile apps ✅ Fix bugs, improve performance, and clean up existing code ✅ Deploy your app to the App Store and Google Play ✅ Support your product after launch with updates and new features 🎯 𝐌𝐲 𝐏𝐫𝐨𝐜𝐞𝐬𝐬 Planning → UI/UX Review → Frontend Development → Backend Development → Testing → Deployment → Ongoing Support 🤝 𝐋𝐞𝐭’𝐬 𝐁𝐮𝐢𝐥𝐝 𝐈𝐭 𝐑𝐢𝐠𝐡𝐭 Share your app idea, requirements, or existing product details, and I’ll help you choose the right approach, build a clean solution, and launch successfully.

🙋‍♂️ I've built quick test versions of apps in just 4 to 6 weeks, launching over 50 that together pulled in $5 million in starting funds. 💬 What Clients said about me: "Fantastic developer and pleasure to work with. Highly recommend. Alex is a talented developer, adheres to strict deadlines. Certainly a great addition to any development (front or backend) team." -- Evan Tousey -- "Alex is awesome! He's very quick at finishing tasks, and can deliver exactly what you're looking for. I wish I had more tasks for him to do, and would totally get Alex to work on other tasks. He also started working on the task in advance, and finished way before my timeline. Props to him!" -- Yannie Tan -- With more than 10 years walking the full path of app-building, I've teamed up with folks from new startups to big established camps. I listen deep to your dream, turn it into a working app that breathes life, and stick around to help it thrive on the market trail. 🛠️ Here's the toolkit I carry: - AI Integrations: OpenAI, Cursor, Claude, Sonar, Llama, LLM, Langchain, Generative AI, Agentic AI, Multi-Model, Vector DB, - Frontend: JavaScript, TypeScript, React.js, MUI, Next.js, HTML, CSS, Tailwind, ShadCN, Flutter, Dart. - Mobile: React Native, Expo, Flutter, Redux, Zustand, NativeBase, react-navigation, react-native-reanimated. - Backend: Node.js, Python, Django, Firebase, Supabase. - UI/UX: Figma, wireframes, prototypes, sharp designs. - Databases: MySQL, PostgreSQL, MongoDB. - DevOps/Cloud: AWS, GCP, Vercel, Agile/Jira. - Agile: Jira, Scrum, Asana, Trello. - Version Control: Git, GitHub, GitLab, Bitbucket. Tell me your vision and I'll go beyond with real results you can count. I hit goals and meet deadlines. Ready to lift your startup like raising a lodge? 📩 Send me a message or invitation, and let's build something amazing together. --- If you check my profile, I've got open spots right now (Last Updated: Feb 2026) Keyword: ARKit, AVKit, ClassKit, CloudKit, ClockKit, Core Bluetooth, Core Data, Core ML, EventKit, GameKit, HealthKit, HomeKit, MapKit, Metal API, PassKit, PushKit, SceneKit, SiriKit, SpriteKit, StoreKit, TVMLKit, UIKit, WatchKit, WebKit, iBeacon, iAd, GLKit, Apple Pay JS, Apple Xcode, SwiftUI, iOS SDK, Instruments, Apple Watch Application, Apple HealthKit, TestFlight, App Store Upload, Swift, Objective-C, Kotlin, Java, Dart, TypeScript, JavaScript, Python, PHP, HTML5, CSS3, React Native, Flutter, FlutterFlow, NativeScript, Angular, AngularJS, Mobile Angular UI, Firebase, AWS Amplify, Retrofit, RxSwift, SwiftyJSON, Dagger, Android Studio, Android SDK, Android NDK, Android Debug Bridge, Gradle, Mapbox, WebRTC, Kendo UI, CodeIgniter, MVC Framework, ARCore, Google Cloud Vision API, Google ML Kit, OpenAI API, ExpressJS, Node.js, GraphQL, RESTful Architecture, LangChain, SQLite, Realm Database, Firebase Realtime Database, Firebase Cloud Firestore, MySQL, MongoDB, Amazon DynamoDB, PostgreSQL, MariaDB, Redis, LevelDB, Android Room Persistence, Push Notifications, In-App Purchases, In-App Advertising, In-App Search, In-App Support, In-App Subscription, Payment Functionality, Payment Gateway Integration, Map Integration, Location-Based Service, Bluetooth, Camera, Microphone, QR & Barcode Scanner, Augmented Reality, Face Detection, Text-to-Speech, Motion Sensor, Click-to-Call, User Authentication, User Profile Creation, Social Media Account Integration, Chat & Messaging, Review or Feedback Collection, Offline Functionality, Application Security, Advanced Analytics, Mobile App Development, iOS Development, Android App Development, Hybrid App Development, Native App Development, AI Mobile App Development, Mobile App Bug Fix, Mobile App Improvement, Mobile App Redesign, Mobile App Testing, Mobile App Localization, Mobile App Development Consultation, App Feature Development, Custom App, iPad App Development, iPhone & iPad Apps, Apple Watch Application, AR Application, AR & VR Applications, VR Application, Ecommerce Functionality, HIPAA, Food Delivery Application, Telemedicine, SaaS, Mobile App Design, UI/UX Prototyping, User Interface Design, User Experience Design, User Flow, Figma, SwiftUI, Material UI, iPhone UI Design, Amazon Web Services, Google Cloud Vision API, Firebase, Node.js, GraphQL, API Development, API Integration, Google Maps API, Git, Agile Software Development, Full-Stack Development, Application Optimization, Application Improvement, Ecommerce, Analytics Dashboard, Flutter developer, Flutter app developer, Android app developer, iOS app developer, Cross-platform mobile developer, Mobile app development, AI mobile app developer, Artificial intelligence app development, Machine learning app integration, Firebase app developer, API integration Flutter, Hybrid app developer, AI solutions for mobile apps, AI app developer, Mobile App Developer, Senior Mobile App Developer, Mobile App Development, Dating App, Flutter Mobile App Development, Education App Developer, Mobile App Developer, Sa

✅ Upwork Top Rated & Verified Mobile Developer Apple App Store Rankings: #74 Overall | #5 Sports | #25 “What’s Hot” | #11 Productivity ✔︎ 5-star rated | 100% Job Success | 15+ years experience ✔︎ 75+ projects completed | 50+ apps published to Apple App Store / Google Play ✔︎ Extensive iOS and Android experience (Swift, Objective-C, Kotlin, Java) Creating a modern app is a challenging task, so having someone to help you navigate through the many complexities of not only creating the app, but also getting it live on the store is necessary. I realize how important this project is to you, and with my experience and track record I will be your advocate throughout the entire process. Communication is key to the way that I develop software. With proper communication you can feel confident that all aspects of the app development are moving in the right direction. I will keep you aware of the apps’ progress both with frequent communication by phone/email/Zoom and with consistent updates that can be downloaded and installed on your devices. You are the expert on what the app needs and only you know what is going to work for you and your users. As a former teacher, helping people reach their goals comes naturally to me. I’m looking forward to helping you create the next great app! ------------------------------------------------------------------------------------------------------ Apps developed in these app store categories: Productivity, Medical, Health & Fitness, Sports, Utilities, Education, Games, Music, Books, Business, Lifestyle, Reference, Shopping, News, Navigation, Photo & Video, Food & Drink, Social Networking, Entertainment Large clients include: Stanford University, Monster Digital, UC Davis, Allegheny Health Network, Schroeder Publishing Co, Washington Suburban Sanitary Commission, Cambridge Health Alliance, VICIS Sporting Goods **Additional information available at my company’s website twosuntraders.com.

About Me I have 10+ years of experience in Project Management of Mobile App Development, specializing in Android, iOS, & Cross-Platform App Development using Java, Kotlin, Swift, Objective C, React Native Mobile, Redux Flutter, Firebase, Mongo Db, User Authentication, EHR, FHIR, HL7, HIPAA compliance, Typescripts, and AI-driven applications. My expertise spans iOS & Android development, AI-powered solutions, seamless authentication systems, and full-stack capabilities, ensuring modern, high-performance apps for businesses of all sizes. Our Agency Since July 2017, my husband, our talented 55+ team members, and I have been delivering world-class digital solutions. - 150+ apps successfully delivered across multiple platforms in the last year - $4M+ turnover on Upwork - 500+ successful projects, 15,000+ hours worked - Close to a 100% success rate - Worked with 7, 8, and 9-figure businesses Our Expertise Mobile App Development • Android, iOS, & Cross-Platform Apps (Java, Kotlin, Swift, Objective C, React Native Mobile, Flutter) Web & Full Stack Development • Front-End: React.js, Angular.js, Next.js, WebRTC • Back-End: Node.js, Firebase, MongoDB, PostgreSQL • Cloud Deployment & API Integrations E-commerce & CMS Development • Shopify Developer & Customization • WordPress Developer & WooCommerce Solutions UI/UX Design & Branding • Adobe XD, Figma, Photoshop, Sketch Digital Growth & Security • SEO & Digital Marketing Optimization • Data Security & Intellectual Property Protection Intellectual Property Services • Trademark & Copyright Assistance Why Choose SolidAppMaker? - Tailored Approach: Every project is customized to fit your needs and budget. - Agile Workflow: Regular updates, milestones, and transparent communication. - High-Quality Development: Rigorous testing & performance optimization. - Competitive Pricing: Top-tier services at fair and transparent pricing. - Proven Track Record: Experience with MVPs, SaaS platforms, AI-driven apps, and enterprise solutions. Why SolidAppMaker Stands Out - 8+ years of expertise in UI/UX, mobile apps, SaaS & web development - 510+ projects successfully completed for startups & enterprises - 10+ awards & recognitions, featured on Upwork & top design platforms - 20+ countries served, delivering top-tier prototyping & development solutions Industries We Cover Healthcare, Transport, Retail, Asset Management, Real Estate, Dating, Nature/Wildlife, Rental, Food Delivery, Fintech / Finance and Banking, Cryptocurrency, Entertainment, Hospitality, Logistics, Manufacturing, Media and Publishing, Non-Profit, Sports and Fitness, Travel and Tourism, Utilities, Wellness, Medical Dashboard, Marketplace, Advertising, Automotive, Business Innovations, Ecology, Human Resources, LegalTech, Lifestyle, Fashion, Marketing, Navigation, Education, E-learning. Highlighted Skills Project Planning, MVC Architecture and RESTful APIs, Front-end Technologies (React.js, HTML5, CSS3, JavaScript), Responsive and Mobile-first Design, Database Design and Implementation (MongoDB, Firebase), User Authentication, Integration of Third-party APIs, Deployment to Cloud Platforms (AWS), Test-driven Development, Agile Methodologies (Scrum, Kanban), Security Technologies, QR Code Scanner, GPS and Mapping, Blockchain and NFT, ChatGPT and Artificial Intelligence. React Native Mobile Developer 10+ years of experience As a Mobile App Developer and Full Stack Developer with deep expertise in SaaS Mobile App, React Native Mobile App I bring over a decade of experience in building high-performance cross-platform mobile application. As a talented React Native Mobile Developer with good knowledge of cross-platform development, I specialize in crafting high-performance mobile apps for both iOS and Android platforms. I made more than 400 apps using React Native Mobile. Reactnative Mobile is my main tech stack, making top-performing apps using React Native Mobile. IOSDeveloper AndroidDevelop As a mobile app developer and full stack developer, I specialize in building robust cross-platform solutions using Flutter, React Native Mobile, and Expo for rapid development. My projects often leverage Firebase for secure real-time data storage and user authentication, and I have hands-on experience integrating WebRTC for live video and audio communication inside mobile apps. On the backend, I frequently use Laravel to build scalable APIs and admin panels that perfectly support mobileapp solutions. ReactNative Next Steps – Let’s Build Something Amazing! 📅 Would you be available for a 30-60 minute free consultation? During this meeting, we will: - Go over your project goals, technical needs, and budget. - Provide a project plan with a timeline and cost estimate. - Discuss the best development approach to fit your vision. - Send me a message, and I’ll share the Upwork scheduler link so we can set up a time that works best for you. Looking forward to collaborating and creating something extraordinary! Best regards, Daisy VC

𝐘𝐨𝐮𝐫 𝐚𝐩𝐩 𝐢𝐝𝐞𝐚 𝐝𝐞𝐬𝐞𝐫𝐯𝐞𝐬 𝐦𝐨𝐫𝐞 𝐭𝐡𝐚𝐧 𝐚 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 𝐰𝐡𝐨 𝐣𝐮𝐬𝐭 𝐰𝐫𝐢𝐭𝐞𝐬 𝐜𝐨𝐝𝐞 𝐢𝐭 𝐧𝐞𝐞𝐝𝐬 𝐬𝐨𝐦𝐞𝐨𝐧𝐞 𝐰𝐡𝐨'𝐬 𝐬𝐡𝐢𝐩𝐩𝐞𝐝 𝟏𝟎𝟎+ 𝐚𝐩𝐩𝐬 𝐚𝐧𝐝 𝐤𝐧𝐨𝐰𝐬 𝐰𝐡𝐚𝐭 𝐚𝐜𝐭𝐮𝐚𝐥𝐥𝐲 𝐠𝐞𝐭𝐬 𝐮𝐬𝐞𝐫𝐬 𝐭𝐨 𝐨𝐩𝐞𝐧, 𝐬𝐭𝐚𝐲, 𝐚𝐧𝐝 𝐩𝐚𝐲. I’m a Mobile App Developer with 10+ years of experience, specializing in Flutter and React Native, helping startups, SaaS companies, and businesses build scalable Android & iOS applications, MVPs, and production-ready mobile products. I have successfully delivered 100+ mobile applications, focusing on performance, user experience, and long-term scalability. I build modern cross-platform mobile applications that solve real business problems, improve user engagement, and help businesses launch products faster. From product planning and architecture to development, testing, and App Store deployment, I handle the complete mobile app development lifecycle. My expertise is focused on Flutter and React Native development, creating high-performance applications with clean architecture, responsive UI, smooth user experiences, and maintainable codebases. My core expertise includes: • Flutter App Development • React Native App Development • Cross-Platform Mobile App Development • Android & iOS Mobile Applications • Startup MVP Development • SaaS Mobile Applications • Firebase Integration • REST API & Third-Party API Integration • Authentication Systems (Email, Google, Apple, Phone, Social Login) • Payment Gateway Integration (Stripe, Apple Pay, Google Pay) • Push Notifications & Real-Time Features • Google Maps & Location-Based Services • AI-Powered Mobile Applications & OpenAI API Integration • App Store & Google Play Store Deployment I have built mobile solutions across multiple industries, including: • SaaS Applications • Business Applications • Healthcare Apps • Fitness & Wellness Apps • Marketplace Platforms • Booking Applications • Food Delivery Apps • Real Estate Applications • Social Networking Apps • AI-Based Mobile Products My development process includes: ✓ Understanding your product goals and user requirements ✓ Defining scalable architecture and development milestones ✓ Building clean, maintainable, and production-ready mobile applications ✓ Integrating APIs, Firebase, authentication, payments, maps, and third-party services ✓ Testing for performance, stability, and usability ✓ Deploying applications successfully to the Apple App Store and Google Play Store Why clients choose to work with me: • 10+ years of mobile app development experience • 100+ mobile applications delivered across different industries • Strong expertise in Flutter and React Native ecosystems • Business-focused approach with attention to scalability and user experience • Clean, maintainable code and structured development workflow • Experience building MVPs, improving existing apps, and adding new features • Clear communication and reliable long-term support Whether you’re launching a new MVP, improving an existing mobile application, or building a complete digital product, I can help transform your idea into a scalable, reliable, and user-focused Android & iOS application. Let’s discuss your project requirements and build a mobile solution that creates real value for your users.