🇺🇸 USA Born and raised - Fluent English Speaker 👨🏽‍💻 ✅ Trust & Integrity are my #1 priorities. I pride myself on excellent communication, fast execution, strong project management, and being a reliable technical partner who fully understands your mobile app vision before building. I’m a full stack mobile app developer with 12+ years of engineering experience specializing in designing, building, managing, and maintaining production-ready iOS and Android applications. I help startups, founders, and businesses transform ideas into scalable mobile apps — from initial app prototyping and MVP development to long-term maintenance, feature updates, optimization, and scaling. Before AI, I built software using traditional engineering practices and focused on creating secure, scalable architectures. Today, I combine that experience with AI-assisted development to move significantly faster while maintaining production-grade engineering standards at lower costs. I leverage AI tools like Claude Code, Cursor AI, and ChatGPT to accelerate mobile app development, architecture planning, debugging, prototyping, integrations, maintenance, and shipping. I’ve professionally designed, built, managed, and maintained 100+ full stack mobile apps, SaaS apps, AI-powered applications, marketplaces, automation systems, and custom software solutions using React Native, Flutter, FlutterFlow, Adalo, React, Next.js, Node.js, JavaScript, APIs, databases, cloud platforms, and modern AI-assisted development workflows. My mobile app expertise includes: 📱 iOS app development 📱 Android app development 📱 React Native development 📱 Flutter & FlutterFlow development 📱 Mobile app maintenance & management 📱 App updates, bug fixes, and performance optimization 📱 AI-powered mobile apps 📱 Social media apps 📱 Marketplace apps 📱 SaaS mobile applications 📱 API integrations 📱 Backend architecture 📱 Authentication, payments, subscriptions, notifications, and automation systems A large part of my workflow involves engineering AI-assisted development systems using Claude Code and Cursor specifically designed to produce secure, scalable, maintainable software faster than traditional development cycles. 🏆 Top-Rated Plus status and 100% Job Satisfaction (Upwork & outside platforms) I work with founders, startups, and businesses looking for a long-term technical partner who can build, manage, and maintain their mobile applications from idea to production. 🙅 Please don't contact me if communication is poor. Keywords: mobile app development, mobile app developer, iOS app development, Android app development, iPhone app developer, Android app developer, React Native developer, Flutter developer, FlutterFlow developer, cross platform app development, native mobile app development, hybrid app development, mobile application development, mobile app design, mobile UI/UX design, mobile app prototyping, MVP app development, startup app development, consumer app development, SaaS mobile app development, AI mobile app development, AI-powered mobile apps, mobile app maintenance, mobile app management, mobile app updates, mobile app optimization, mobile app scaling, mobile app bug fixing, mobile app support, app redesign, app modernization, app performance optimization, mobile backend development, mobile API integration, REST API integration, GraphQL integration, Firebase development, Supabase mobile apps, mobile database architecture, authentication systems, payment integration, subscription apps, App Store deployment, Google Play Store deployment, App Store optimization, push notifications, location-based apps, social media apps, marketplace apps, eCommerce apps, fitness apps, healthcare apps, fintech apps, booking apps, on-demand apps, mobile SaaS platforms, enterprise mobile apps, custom mobile applications, mobile-first development, app architecture, scalable mobile applications, full stack mobile developer, mobile app consultant, mobile app engineer, mobile product development, app MVP builder, startup technical partner

I’m a Top-Rated Senior Full Stack Developer with 13+ years of experience building scalable web and mobile applications for startups, agencies, and enterprise clients. I specialize in delivering high-performance, user-focused solutions across both front-end and back-end development, with a strong focus on clean architecture, scalability, and long-term maintainability. ✅ Top Rated Plus – Expert-Vetted Top 1%
 ✅ 13+ Years of Professional Experience
 ✅ Full Stack Web & Mobile Application Development
 ✅ Strong Experience with Startups, SaaS Platforms & Enterprise Solutions Technical Expertise: Mobile:
Flutter, React Native, Swift, Java CMS & E-Commerce:
WordPress, Shopify, WooCommerce, HubSpot, Drupal Frontend:
React, Angular, Vue.js, Next.js, HTML5, CSS3, Tailwind CSS, Bootstrap Backend:
Node.js, Express.js, Django, Python, Laravel, .NET Databases:
PostgreSQL, MySQL, MongoDB, Firebase DevOps & Cloud:
Git, Docker, CI/CD, AWS, Azure, Nginx I have extensive experience leading projects from concept to deployment, building robust APIs, custom platforms, mobile applications, and scalable cloud-based systems while ensuring high code quality and seamless user experiences.

🫡 Extremely Reliable, Communicative and Fast 🥇 The Top 1% of Talent (Expert Vetted) 💰 60+ apps shipped, generating over 8 figures in revenue. ⚡ AI speed combined with 8 years of production experience to deliver code that ships fast, feels premium, and scales without cracking. (Available for 2 projects in April 2026) 🛠️ Specializing in Mobile App Development | Flutter, Swift, or React | iOS and Android 🇺🇸 Honored as a Top Mobile App Developer for hire in the United States from 2020-2025. 🏆 Award Winning Mobile App Developer: previous app featured on Apple's List of Best Language Learning Apps. 📰 Featured on Business Insider for my innovative contributions to mobile app development on Upwork. I've had the privilege of propelling clients to significant milestones, including achieving $2M in Annual Recurring Revenue (ARR). Some notable successes include: - A restaurant subscription app reaching $100K+ Monthly Recurring Revenue (MRR) - A fitness community app achieving $1.5M+ ARR. ⭐️ Client Testimonials: "Michael is a gem in the world of mobile app development..." "Among the top 3 developers I've worked with over the past three years..." "A quality developer and a quality human being..." Upwork Stats: 🏅 Top 1% of Mobile Developers 🏅 Top 1% of iOS Developers 🏅 Top 5% of Firebase Developers 🏅 Top 5% of Swift Developers 🎓 Proud Michigan State University Graduate with a Bachelor's Degree in Computer Science. With a solid eight-year trajectory as a Mobile App Developer, I've honed my skills across a plethora of projects that span iOS and Android platforms, utilizing Flutter and Swift to create high-impact applications. My forte lies in converting ideas into digital realities that propel businesses forward. From crafting engaging user interfaces to optimizing backend processes, my holistic approach ensures a robust and scalable app solution. I thrive in various development scenarios, whether its working with a team to deliver a project on a tight deadline or building an application from scratch all on my own. My experience extends to working with startups that have secured significant venture capital funding, as well as established enterprises aiming to expand their digital footprint. 🌟 Why Choose Me: Client Satisfaction: My reviews reflect the genuine value I provide. Effective Communication: I prioritize prompt and sincere interactions to ensure project fluidity. Mastery: I strive for flawless, visually appealing apps worthy of portfolio inclusion. 😁 Excited to collaborate! Whether you're a startup aiming to elevate your product or an established enterprise looking to scale, I'm here to help. Let’s kickstart our partnership with a complimentary 30 minute discussion to blueprint your pathway to success. Specialities: Full Stack Development, AI Systems Architect, AI SaaS Developer, SaaS MVP Development, Mobile MVP Development, Cross-Platform Mobile Apps, Mobile App Development, iOS Development, Scalable SaaS Architecture, AI-Powered SaaS, Flutter App Development, React Native App Development, Backend Development, Frontend Development, Mobile App Architecture, Cross Platform App Development, AI Powered Applications, API Integration, API-Driven Mobile Apps, Cloud Architecture, Production-Ready MVP, Secure APIs, OpenAI Integration, AI Workflow Automation, LLM Integration

Maximize your ROAS by fixing broken tracking. I help mobile apps fix AppsFlyer discrepancies, iOS implement SKAN 4.0, and ensure every dollar of marketing spend is accurately measured. With 100+ successful Upwork projects and 9+ years of experience, I specialize in AppsFlyer setup, Meta Conversion API integration, and Google ads for iOS and Android apps. 📊 WHAT I SPECIALIZE IN: - AppsFlyer Implementation & Setup (iOS + Android apps) - iOS SKAN 4.0 Attribution for Meta, Google, TikTok campaigns - Mobile App Conversion Tracking (installs, events, purchases) - Meta Conversion API Integration (server-side tracking) - Firebase Analytics + AppsFlyer Integration - Attribution Audits (fix data discrepancies, duplicate events) ⚡ RECENT CLIENT RESULTS: ✅ Fixed AppsFlyer + Firebase data mismatch for fintech app (40% discrepancy → 3%) ✅ Implemented iOS SKAN 4.0 for gaming app, recovered $300K in misattributed ad spend ✅ Set up Meta CAPI for e-commerce app, ROAS improved from 1.1 → 3.4 ✅ Migrated dating app from Adjust to AppsFlyer with zero data loss 💼 PERFECT FOR: ✅ Mobile apps (iOS/Android) spending $5K+/month on ads ✅ Gaming, fintech, e-commerce, social, dating, fitness apps ✅ Apps needing AppsFlyer or Singular setup from scratch ✅ iOS apps struggling with SKAN attribution after iOS 14+ ✅ Apps with broken Meta/Google/TikTok tracking ✅ Apps migrating between attribution platforms ✅ Integrating Revenucat with Appsflyer for trial to subscription tracking 🛠️ TOOLS & PLATFORMS: Mobile Attribution: AppsFlyer (100+ implementations), Singular, Branch, Firebase, RevenueCat iOS & Android: SKAN 4.0, Android SDK, React Native, Flutter, Deep Linking Ad Platforms: Meta CAPI, Google Ads, TikTok Events API, Snapchat CAPI, Apple Search Ads Analytics: Firebase, GA4 (mobile), Looker Studio, BigQuery 🔹 CORE SERVICES: ✔️ AppsFlyer Setup & Integration - Complete SDK implementation, event tracking, deep linking ✔️ iOS SKAN 4.0 Implementation - Conversion values, postbacks, campaign optimization ✔️ Meta Conversion API - Server-side setup, event mapping, deduplication ✔️ Firebase + AppsFlyer Integration - Dual tracking, event sync, data consistency ✔️ Attribution Audits - Discrepancy fixes, duplicate detection, integration testing Common Problems I Solve: - "Why is AppsFlyer showing different numbers than Meta Ads Manager?" - "How do I set up iOS SKAN 4.0 for my app?" - "Can you integrate AppsFlyer with our existing Firebase setup?" - "We're getting no install data from TikTok ads - can you fix it?" Let's fix your mobile app attribution → get accurate data → scale profitable campaigns. 🏆 Top Rated Plus | 100% Job Success | 100+ Projects

🔥 I am a Senior iOS Developer with industry experience since 2009. I have worked on dozens of mobile applications and continue to strive for quality in everything I create. I help companies create quality products in the beginning, or turn their already created application into one, that will last the test of time so it doesn’t need to be completely rewritten in a few months. Unlike other developers, I have experience from initial idea, to design, through implementation, and deployment, so I can predict potential problems before they happen to reduce costs. A little more about me, I’ve launched several dozen complex iOS apps. Collectively, they have grown to many millions of active users. Check below for just a few of the apps I have worked on! My clients include: 📍 Apple 📍 Time Warner Cable 📍 DaVita 📍 Experian 📍 Charter Communications ⭐ What I can bring to your project ✅ Top-notch experience on all iOS platforms ✅ Extensive experience working with large Swift and Objective-C code bases. ✅ Expert understanding of software architecture ✅ Ability to quickly diagnose bugs and provide fixes that meet your timeline. ✅ 24/7 clear communication: you will always be aware of the project status ✅ Someone who cares about helping you succeed and bringing value to your business ⭐ Why you should choose me ✅ Client Reviews: I focus on providing value to all of my clients and earning their trust and praise. ✅ Over-Delivering: this is core to my work as a freelancer. My focus is on giving everything and more. ✅ Responsiveness: being extremely responsive and keeping all lines of communication readily open. ✅ Resilience: For any issue that my clients face, I work through it until I find a solution. ✅ Kindness: Treating everyone with respect, understanding all situations with empathy, and genuinely wanting to improve my client's situations. 🏆 Reviews and feedback from clients The client reviews below are just a few quotes that describe the quality of work and value that you can expect from working with me. ⭐⭐⭐⭐⭐ "You're awesome! Thank you so much for getting all this resolved & fixing all the small things I was worried about. Second of all... you're awesome!" - Melissa ⭐⭐⭐⭐⭐ "Thanks for your excellent work implementing the changes - it is an excellent opportunity testing these ideas live - extremely helpful!" - Grace ⭐⭐⭐⭐⭐ "Thank you so much for everything! You have been so helpful and knowledgeable. " - Ammar

✨ Expert-Vetted Senior iOS Engineer by Upwork | Honored to be among the Top 1% of Global iOS Talent. I am a Product-Minded Engineer with over a decade of system development expertise, specializing in High-Fidelity Native iOS since 2016. My career is defined by high-standard iOS app execution—notably independently architecting the iOS Home & Lock Screen Widgets for Edison Mail (4.5+ stars), which earned a prestigious App Store Editorial Feature. 🚀 🏗️ My Engineering Standards: • 💎 Pixel-Perfect Craftsmanship: I treat Figma designs as a baseline for excellence. I specialize in building fluid, state-driven interfaces with custom animations, haptic feedback, and complex gesture systems—ensuring every interaction feels premium. • 🤖 AI-Native Development: I leverage modern AI orchestration (MCP, Cursor Rules) to accelerate development cycles while maintaining high code quality. I build systems that are architected to be AI-ready from the ground up. • ⚙️ Scalable System Design: With a strong foundation in large-scale engineering, I prioritize Modern Concurrency (Actors/Task Groups), memory optimization (Instruments), and modular architecture to ensure long-term maintainability. • 🛠️ Full-Stack Perspective: Beyond Native iOS, I am proficient in architecting the entire data lifecycle—from Supabase/Postgres schema design to complex backend integration. I bridge the gap between high-performance data logic and seamless mobile UX. 💬 What Clients Say: • "Jun delivered solid work and went the extra mile for the UX. I enjoyed working with him for his communication and strong work ethics." — Taining L. • "Reliable, pleasant to work with, and always committed to the high-standard delivery of our mobile application." — Nicolas R.  Ready to build something world-class? Whether you need a lead developer for a 0-to-1 venture or an expert to refactor legacy views into high-performance SwiftUI, I provide the engineering depth your product deserves.

If your roadmap includes ARKit, Computer Vision, LiDAR, RoomPlan, or Spatial Computing, you're probably not looking for a typical mobile developer. You're looking for someone who has already solved similar problems. Over the past few years, I've had the opportunity to contribute to products built by startups and established companies including Q.ai (acquired by Apple), Arpalus, Resonai, Polarsteps, Evooia, ShotSense Golf, and Clopinz Golf, working on challenges involving ARKit, Computer Vision, Spatial Computing, mobile SDKs, and performance-critical native applications. ________________ I specialize in ARKit, Computer Vision, Spatial Computing, LiDAR scanning, RoomPlan, and real-time AI pipelines running directly on mobile devices. Over the last 10+ years I've built native iOS and Android products, but my primary focus today is helping startups and product teams solve difficult technical challenges involving ARKit, Computer Vision, Machine Learning, 3D Reconstruction, and Spatial Computing. Whether you're building an AR experience, a scanning solution, a digital twin platform, a fitness product powered by pose estimation, or a custom Computer Vision SDK, I can help take it from prototype to production. _________________ 𝙃𝙞𝙜𝙝𝙡𝙞𝙜𝙝𝙩𝙨 ✅ 10+ years building native mobile products and SDKs ✅ 5+ years focused on ARKit, Computer Vision, and Spatial Computing ✅ Delivered production applications using ARKit, RealityKit, Core ML, Vision Framework, ARCore, OpenCV, and custom Computer Vision pipelines ✅ Built solutions involving LiDAR scanning, RoomPlan, floor-plan generation, object detection, pose estimation, face tracking, body tracking, and scene understanding ✅ Extensive experience optimizing ARKit and Computer Vision pipelines to run smoothly on real devices at production scale ✅ Rapid prototyping and proof-of-concept development for technically risky products _________________ 🆘 𝙒𝙝𝙖𝙩 𝙄 𝘾𝙖𝙣 𝘿𝙤 𝙛𝙤𝙧 𝙔𝙤𝙪: 🔹 ARKit applications 🔹 Computer Vision mobile apps 🔹 ARKit SDKs and mobile SDK development 🔹 LiDAR scanning solutions 🔹 RoomPlan integrations 🔹 Floor plan generation systems 🔹 3D reconstruction pipelines 🔹 Spatial Computing applications 🔹 Object detection and object tracking 🔹 Pose estimation systems 🔹 Fitness and motion analysis products 🔹 Digital twin platforms 🔹 Real-time camera processing pipelines 🔹 AI-powered mobile applications 🔹 Native iOS and Android products _________________ ☑️ 𝘾𝙤𝙧𝙚 𝙎𝙠𝙞𝙡𝙡𝙨 & 𝙏𝙚𝙘𝙝𝙣𝙤𝙡𝙤𝙜𝙞𝙚𝙨:  Apple Ecosystem: Swift, ARKit, RealityKit, Vision Framework, Core ML, AVFoundation, Metal, Core Bluetooth, SwiftUI, UIKit, RoomPlan, LiDAR 📲 Android Ecosystem: Kotlin, ARCore, CameraX, MediaPipe, Jetpack 👁️‍🗨️ Computer Vision & AI: Computer Vision, OpenCV, Core ML, ONNX, TensorFlow Lite, Object Detection, Pose Estimation, Image Processing, Face Tracking, Body Tracking, Machine Learning 🧊 Spatial Computing: ARKit, Spatial Computing, RoomPlan, LiDAR Scanning, Digital Twins, 3D Reconstruction, Photogrammetry, Scene Understanding, Spatial Mapping. _________________ 🗓 𝙄𝙣 𝙖 𝙉𝙪𝙩𝙨𝙝𝙚𝙡𝙡 - 𝙅𝙪𝙨𝙩 2025 -2026 𝙃𝙞𝙜𝙝𝙡𝙞𝙜𝙝𝙩𝙨: • ARKit-based indoor scanning and floor-plan generation • LiDAR and RoomPlan powered spatial capture systems • Computer Vision SDKs for retail and object recognition • ARKit product placement and visualization applications • Pose estimation and movement analysis for fitness platforms • Face tracking and biometric measurement solutions • Real-time AI inference pipelines running directly on mobile devices • Custom SDK development for iOS, Android, and React Native integration _________________ I enjoy solving problems that other teams consider too complex, too experimental, or too performance-sensitive for traditional mobile development. Send me the challenge. I'll tell you if it's feasible, what can go wrong, and how I'd approach building it. Last updated: June 2026

Building a mobile app and want to get it right from day one? You’re in the right place. 📩 If you’re serious about building a high-quality mobile product - book your free consultation in DM. I can review your idea, suggest the best approach, and provide a clear estimate within 24 hours. I’m a senior mobile app developer with 8+ years of experience helping startups and businesses design, build, and launch scalable mobile products without wasting time or budget on the wrong decisions. I’ve worked on 20+ projects, including MVPs, production apps, and scaling existing products used by real customers. 🚀 What you get working with me: Product-focused development (not just code execution) Smart tech decisions that save time and budget Clean, scalable architecture ready for growth Clear communication and predictable delivery 💡 My expertise: 📱 Native iOS & Android - Swift, Kotlin 📱 Cross-platform - Flutter, React Native ⚙️ Backend & APIs - Firebase, AWS, REST API 🎨 UI/UX collaboration - Figma, Sketch I don’t push specific technologies. I choose what fits your product, timeline, and business goals. 🎯 How I can help: MVP strategy & fast validation (launch in weeks, not months) Full-cycle product development (idea → App Store / Google Play) Scaling and optimizing existing apps Architecture & backend integration Fixing unstable apps and improving performance 🌍 I work best with: Funded startups Founders building MVPs Businesses scaling existing products 🤝 My approach: I work as a product partner, not just a developer - helping you prioritize features, avoid costly mistakes, and move faster toward a successful launch. Mobile App Development, iOS Development, Android Development, Cross-Platform Development, Flutter Development, Kotlin Development, Swift Development, Java Development, Software Development Agency, Full-Cycle Development, MVP Development, Product Development, App Maintenance, Software Consulting, Agile Development, API Integration, Backend Development, Cloud-Based Solutions, SaaS Development, UI/UX Design, HealthTech App Development, FinTech App Development, EdTech Solutions, E-commerce Mobile Apps, Social Media Apps, IoT Mobile Development, AI-Powered Apps, Accessibility Solutions, GPS & Location-Based Apps, Mobile Security & Encryption, REST API, Firebase, Google Cloud, AWS, BLE (Bluetooth Low Energy), Custom UI Development, Mobile App Security, Payment Gateway Integration, AI & Machine Learning, AR/VR

I am a creative and innovative thinker who craves to solve challenges. A motivated team player who consistently strives to develop solutions for complex problems. I aim to thrive in a challenging environment by utilizing my technical skills & expertise towards the development and implementation of new ideas, contributing to the growth of the organization. We are experts in • iOS Application Development • Python,Python Framework(django) • version controlling (SVN,GitHub), • API(facebook API,youtube API), • HTML,HTML5,CSS,CSS3,Bootstrap(responsive designing ), • Ecomerce Application(OpenCart) • Specially ERP work Python Based(OpenERP

I am a seasoned mobile application developer with over two decades of hands-on experience in crafting cutting-edge mobile solutions. My journey in the industry has seen the evolution of mobile technology, and I've consistently adapted and excelled in delivering top-notch mobile apps. Owner of Oval Innovations, LLC. Key Skills: iOS and Android Development Cross-Platform Development (React Native, Flutter) UI/UX Design and Optimization Backend Integration and API Development Quality Assurance and Testing Continuous Integration/Continuous Deployment (CI/CD) Project Management and Team Leadership