Hire the Best MacOS App Developers

✅ 12+ years in iOS Development 🏆 100% Job Success | $200k+ earned on Upwork I help businesses build and scale mobile apps that stay fast, stable, and reliable as they grow. Many apps start facing issues after launch, slow performance, crashes, and messy code. In most cases, the problem isn’t just development, it’s architecture. I focus on building and fixing systems that scale cleanly from day one. 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. 🚀 What I can help you with: ✅ iOS App Development (Swift, SwiftUI, UIKit) ✅ MVP to Scalable Product Development ✅ Fixing and Scaling Existing Apps ✅ Clean Architecture (MVVM, MVC) & Code Refactoring ✅ Performance Optimization & Stability ⚙️ Core Development & Features: ✔ Local database (Core Data, SQLite), offline sync ✔ API integration (REST, GraphQL) ✔ Authentication (Apple, Google, OAuth, JWT) ✔ Push notifications (APNs, Firebase) ✔ Background tasks & lifecycle handling ✔ Secure data handling & performance tuning 🔥 Advanced Integrations: ✔ AI integrations (OpenAI, ChatGPT features) ✔ Payments (Apple Pay, Stripe, in-app purchases, subscriptions) ✔ Location services (GPS, MapKit, Google Maps) ✔ Real-time chat & messaging (Firebase, WebSockets) ✔ Analytics (Firebase, Mixpanel) ✔ Media handling (image/video upload, streaming) 🏢 Proven Work: ⭐ Built and maintained a production system running across 150+ stores for Red Swan Pizza 🔗 Extended Capabilities: ✔ Backend coordination (Node.js, Firebase, AWS) ✔ Android development support via team (Kotlin, Jetpack, Room) ✔ 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. 👉 Feel free to message me. Happy to review your app or idea before we start.

🚀 𝐓𝐡𝐞 𝐀𝐩𝐩 𝐒𝐭𝐨𝐫𝐞 𝐢𝐬 𝐜𝐫𝐨𝐰𝐝𝐞𝐝, 𝐚𝐧𝐝 𝐚𝐯𝐞𝐫𝐚𝐠𝐞 𝐝𝐞𝐬𝐢𝐠𝐧 𝐣𝐮𝐬𝐭 𝐝𝐨𝐞𝐬𝐧’𝐭 𝐜𝐮𝐭 𝐢𝐭 𝐚𝐧𝐲𝐦𝐨𝐫𝐞. Whether it’s a mobile app, a macOS desktop tool, or a UI that converts users demand performance, beauty, and seamless experience. That’s where I come in. I'm a 𝐌𝐨𝐛𝐢𝐥𝐞 & 𝐦𝐚𝐜𝐎𝐒 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 + 𝐔𝐈/𝐔𝐗 𝐃𝐞𝐬𝐢𝐠𝐧𝐞𝐫 with a proven record of building high-performance apps and clean, conversion-driven designs. I specialize in delivering Swift-powered solutions that combine sleek front-ends with rock-solid back-end logic. 🔧 𝐖𝐡𝐚𝐭 𝐈 𝐎𝐟𝐟𝐞𝐫: ✔ iOS Development (Swift, SwiftUI, Combine, CoreData) ✔ macOS Desktop App Development using native frameworks & APIs ✔ MVVM Architecture for scalable, clean codebases ✔ Firebase Integration (Realtime DB, Auth, Cloud Messaging, Firestore) ✔ Custom PDF Workflows with PDFKit ✔ Smooth Lottie Animations for next-level UI ✔ API Integration + JSON Serialization with precision ✔ UI/UX Design in Figma – From wireframe to final screen ✔ Responsive Design for all screen sizes (Mobile + Desktop) ✔ Landing Pages & Web UI that convert visitors into users 💡 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐇𝐢𝐫𝐞 𝐌𝐞: ✔ 6+ years of experience across mobile, desktop & UI design ✔ Cross-disciplinary skills I don’t just code, I design with purpose ✔ Clean, modular code that’s easy to scale and maintain ✔ Great communication, deadline-oriented, and focused on ROI ✔ Solutions built around real user behavior not just trends 🏆 𝐑𝐞𝐜𝐞𝐧𝐭 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬: 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟏 – 𝐒𝐰𝐢𝐟𝐭𝐔𝐈 + 𝐏𝐃𝐅𝐊𝐢𝐭 𝐀𝐩𝐩 𝐰𝐢𝐭𝐡 𝐅𝐢𝐫𝐞𝐛𝐚𝐬𝐞 𝐒𝐲𝐧𝐜 Developed a cross-platform app (iOS + macOS) using SwiftUI and PDFKit, integrated with Firebase for real-time data sync and custom PDF export workflows. 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟐 – 𝐦𝐚𝐜𝐎𝐒 𝐃𝐞𝐬𝐤𝐭𝐨𝐩 𝐀𝐩𝐩 𝐰𝐢𝐭𝐡 𝐂𝐨𝐫𝐞𝐃𝐚𝐭𝐚 + 𝐂𝐨𝐦𝐛𝐢𝐧𝐞 Delivered a clean, MVVM-structured desktop app using CoreData and Combine for smooth UI updates and persistent storage. 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟑 – 𝐀𝐏𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐀𝐩𝐩 𝐰𝐢𝐭𝐡 𝐋𝐨𝐭𝐭𝐢𝐞 𝐀𝐧𝐢𝐦𝐚𝐭𝐢𝐨𝐧𝐬 Built a visually rich app featuring Lottie animations and seamless third-party API integration for enhanced interactivity. 🔗 𝐏𝐨𝐫𝐭𝐟𝐨𝐥𝐢𝐨 𝟒 – 𝐑𝐞𝐬𝐩𝐨𝐧𝐬𝐢𝐯𝐞 𝐒𝐡𝐨𝐩𝐩𝐢𝐧𝐠 𝐀𝐩𝐩 𝐔𝐈 𝐢𝐧 𝐅𝐢𝐠𝐦𝐚 Designed a mobile shopping app UI in Figma with responsive layouts, optimized for usability across iPhone and iPad screens. You can explore these live projects in my portfolio for real examples of my code, design, and delivery standards. 👥 𝐖𝐡𝐨 𝐈 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡: Startups & Entrepreneurs launching new mobile or macOS apps Agencies who need reliable developers/designers for client work Businesses looking to redesign or optimize mobile/Desktop UI/UX Tech teams who need clean architecture, API handling, and modern Swift coding 🎯 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 & 𝐓𝐨𝐨𝐥𝐬: Languages/Frameworks: Swift, SwiftUI, Combine, Firebase, MVVM, CoreData Design: Figma, Lottie, Responsive Design Tools: PDFKit, REST APIs, JSON serialization, Git You’ve got a product that deserves to perform and look outstanding let’s make sure your users love every tap, swipe, and click. Click “Invite” and let’s build something that scales, converts, and stands out.

Most clients come to me after a bad experience. A developer who went quiet mid-project. An agency that looked great on the call and disappeared after the deposit. Or they're posting a job and genuinely don't know how to tell who's worth trusting. I get it. Hiring a senior iOS/macOS developer or AI developer you've never met, for a product that actually matters to you, takes a leap. So here's what I can offer instead of asking you to just trust me: - a 100% Job Success Score built over real client relationships, - a 7+ month active partnership with a SaaS client where I delivered 3 production apps, - and a track record where 70%+ of projects turn into ongoing work. Not because I pitch retainers, but because the work holds up. I specialize in native iOS/macOS development and AI-powered products. I take full ownership from architecture to deployment and stay invested in whether what I build actually moves your business forward. Core technical depth: - Native iOS & macOS development (Swift, SwiftUI) - AI-powered apps and intelligent product features - Python backends, APIs, Firebase, Supabase - Audio, vision, and NLP-based AI systems - Clean architecture built for long-term maintainability and scalability If you're building something serious and need a partner who thinks about your product the way a technical co-founder would, let's talk.

30+ iOS apps live on the App Store. 10+ years building exclusively for Apple. 100% Job Success Score. Not a generalist who "also does mobile" this is all I do. Most developers spread across React Native, Flutter, Android, and whatever's trending. I made a different choice: go all-in on Apple and become genuinely world-class at it. Every project I've shipped runs on Swift and SwiftUI — no cross-platform shortcuts, no compromises on performance or native feel. The result? Apps with 4.5★+ ratings, 10,000+ downloads, and clients who come back for the next version. What my Apple-only focus means for you: — No learning curve on your budget — I know Xcode, App Store Connect, and TestFlight cold — Architecture decisions that scale — no expensive rewrites 6 months later — Zero surprise App Store rejections — I know the review guidelines inside out — Native Apple features done right: WidgetKit, Live Activities, iCloud sync, StoreKit 2, Sign in with Apple Tech I work with every day: Swift · SwiftUI · UIKit · CoreData · CloudKit · WidgetKit · StoreKit 2 · HealthKit · WatchKit · XCTest · Fastlane · TestFlight My track record on Upwork: ✔ Top Rated badge ✔ 100% Job Success Score ✔ 5+ years, 15+ apps delivered ✔ 4.5★+ average across shipped products ✔ 10,000+ combined app downloads I work best with: Founders and product teams who want a developer that cares about the product, not just closing the ticket. If native feel, App Store performance, and clean Swift code matter to you — we'll get along well. Let's talk: Tell me what you're building. I respond within a few hours and happy to jump on a quick call to see if we're a fit. Updated: 12.06.26

🚀 Staff iOS Engineer (10+ yrs) — Real-time Video/VoIP & AI Integration I build and fix iOS/macOS apps fast—clean, stable, and ready to ship. Previously at Fanatics (Live & Collect), Agora (macOS Tech Lead), and RingCentral (Staff Engineer). I specialize in two high-value areas: real-time audio/video systems and production AI integration. ✅ Selected impact • Reduced crash rate 10x through systematic stability work (crash/ANR triage, threading, memory) • Improved user NPS +40% via closed-loop quality optimization • Evolved a live platform from viewer-only → full broadcaster (streaming + interactions) • Built ANR monitoring (main-thread blocking detection) → 3x faster issue resolution • Experience shipping for massive-scale consumer products (e.g., bilibili-level traffic) 🎥 Real-time audio/video & streaming (production) • Live streaming & video conferencing: LiveKit / Agora SDK / Amazon IVS • AVFoundation capture/render pipelines, recording/upload, performance tuning • CallKit + PushKit VoIP calling (background, reconnect, audio routes, reliability) • Real-time interactions: auctions, voting, chat (WebSocket / GraphQL Subscriptions) • Screen sharing: iOS App Extension + macOS plugins • Socket/IM architecture experience; solid networking fundamentals (TCP/UDP) 🤖 AI integration • OpenAI / Claude API integration for user-facing features • HealthKit + Apple Watch data pipelines (sleep/HR/activity/workouts) • Prompt & context management, on-device + cloud orchestration for personalized insights 🏗️ Architecture & engineering • Clean Architecture / SOLID, protocol-oriented DI, modular design • TCA & MVVM (migration and coexistence), Swift Concurrency (async/await, Actors) • Swift + Objective-C, pragmatic refactors, long-term maintainability 🧪 Quality & delivery • Tests: XCTest/XCUITest, snapshot tests; TDD when valuable (Quick/Nimble) • CI/CD: Fastlane, Jenkins/GitHub Actions/Xcode Cloud, TestFlight/App Store release • Logging/analytics (e.g., Firebase/Crashlytics) to locate root causes quickly 🛠️ How I work • Start with a short paid assessment → confirm scope, estimate, and risks • Milestones with demos + clear acceptance criteria • Strong communication, pragmatic testing, and maintainable Swift • Available 40 hrs/week, fluent in English, timezone-friendly and responsive 💻 Equipment: Mac Studio (M1 Max, 32GB), dual 28” 4K monitors, 1Gbps fiber. If you’re building live video/VoIP features, integrating AI into an app, or need to stabilize and scale an existing codebase, feel free to message me—happy to review your scope and propose a plan.

I run User Group LLC, a solo software studio with two offerings: native macOS software and websites. Licensed and insured (GL $2M / E&O $1M), based in St. Petersburg, FL. Native macOS software Menu-bar tools, screen capture, developer utilities, and AI-powered desktop apps. SwiftUI, AppKit, ScreenCaptureKit. I've taken my own products through full Apple review cycles — codesigning, entitlements, Sparkle auto-updates, the rejections, the resubmissions, the works. Shipped: DevCam (menubar screen recorder, App Store), Comprende (patent-pending VS Code extension with comprehension-gating for AI-generated code, live at comprende.dev). Websites Marketing sites, product sites, and small web apps. TypeScript, React, Next.js, Node, PostgreSQL, deployed on Cloudflare or Vercel. I build sites that load fast, look like the product they're selling, and don't fall over when traffic shows up. Shipped: six client and freelance sites, plus my own product sites for Comprende, DevCam, Sysilo, and Schemap. Recent client work OpenClaw — a multi-model agent orchestrator with Slack and Gmail integration for a property management company. Delivered with a 5.0 review: "very communicative, very organized, went above and beyond." How I work Direct communication. No agency layer, no handoffs. I'm the person you hire and the person who builds it. I work AI-natively, which means I ship faster than developers who don't, and I've shipped my own products end-to-end — so I think about your project the way a founder would. If you need a Mac app done right (App Store paperwork, codesigning, updates that actually work) or a website that looks and performs like the product behind it, let's talk.