I am 100% Job Success Top Rated on Upwork, I help founders and startups turn ideas into polished, production-ready iOS applications — with clean architecture, smooth performance, and user experiences that actually feel premium. Previously, I worked as an iOS Engineer at ByteDance, building and optimizing large-scale e-commerce and content platforms used by millions of users daily. My work focused on video performance optimization, scalable mobile architecture, creator-commerce features, analytics attribution, and production stability at scale. Before that, I worked at Tokopedia, one of Indonesia’s largest tech companies, where I contributed to high-impact commerce features and internal platform improvements. What I bring to projects: • Native iOS expertise (Swift, SwiftUI, UIKit) • Production-grade architecture (MVVM, Clean Architecture, SOLID) • Smooth animations & performance optimization • AVPlayer / video streaming / realtime UI • StoreKit subscriptions & monetization flows • AI-assisted product integrations • REST & GraphQL APIs • Firebase, Supabase, analytics, attribution SDKs • App Store submission & rejection recovery • Debugging complex inherited codebases I’m especially strong at: • Taking unfinished or unstable apps and making them production-ready • Translating Figma designs into pixel-perfect native UI • Improving app responsiveness, animations, and UX polish • Working independently with clear communication and fast iteration Recent work includes: • Streaming & subscription apps • AI-powered consumer apps • Real-time messaging apps • SaaS dashboards & automation platforms • Custom charting & financial UI • App Store rescue / stabilization projects A few shipped client products: • Spill – Video Journal • Zapp Messenger: Chat Mindkit I’m not an agency — you’ll work directly with me as the engineer building your product. That means faster communication, better technical alignment, and accountability throughout the project. If you need someone who can think beyond just coding and help ship a stable, scalable, high-quality app, let’s talk.

I build and ship AI-powered iOS apps 3x faster(Bug fixes in 24 to 48 hours, Prototype in 3 to 7 days, MVP in 1 to 2 weeks) than traditional developers. As the founder of a mobile studio that has shipped 8 iOS apps in just 9 months, I understand that code is useless if it doesn't launch. I specialize in taking raw ideas and turning them into fully functional, App Store-approved products in weeks, not months. What I Bring to Your Project: • Speed & Efficiency: My 3 years+ experience allows me to prototype rapidly and iterate instantly. i • Full-Stack AI Integration: Expert in integrating OpenAI, Claude, and Gemini APIs into intuitive SwiftUI interfaces. • Product Mindset: I don't just code; I handle the full lifecycle from UI/UX design to App Store submission and rejection handling. My Recent Launches: • ToneFit AI: A workout tracker with AI-generated routines (Dec 2025). • NetCal: An AI-powered calorie tracker (May 2025). • UpRight: A posture coach utilizing AirPods motion data (July 2025). Whether you need an MVP to test a market or a complex AI integration, I deliver production-ready code that scales.

Senior iOS Developer with 14+ years building apps that ship — from zero-to-App Store MVPs for startups to scaling complex codebases for established products. 🚀 What I can help you with: ✅ New iOS app — Swift, SwiftUI, UIKit from scratch ✅ MVP development — concept to App Store submission ✅ Legacy app rescue — refactor Objective-C to Swift, fix crashes, improve performance ✅ Feature development — in-app purchases, push notifications, location, media, APIs ✅ Code review & architecture — MVVM, MVC, clean architecture ⚙️ Core technologies: 🔹 Swift · SwiftUI · UIKit · Objective-C (legacy support) 🔹 Firebase (Auth, Realtime DB, Push, Dynamic Links, Messaging) 🔹 CoreData · SQLite · RESTful API integration 🔹 AVFoundation · CoreAudio · MapKit · StoreKit 🔹 In-app purchases · Push notifications · GPS · Photo/Video/Audio 🔹 Git · CocoaPods · Swift Package Manager 🔹 App Store submission · TestFlight · deployment I've worked across fintech, social, media, and entertainment apps — including integrations with Facebook, Google, Instagram, Twitter, YouTube, and Vimeo. I also have cross-platform experience in Cocos2d-x (iOS & Android). I use AI-assisted development tools (Claude, Codex) to ship faster without cutting corners on code quality. 14 years means I've seen every edge case, debugged every crash type, and shipped under every kind of deadline. You get a developer who moves fast and doesn't disappear. 📩 Send me your project brief — I'll respond within 4 hours.

I am a Senior Full-Stack Mobile Architect with 7+ years of professional experience engineering high-performance, custom digital ecosystems. Moving beyond restrictive template platforms like WordPress or Shopify, I specialize in building bespoke, enterprise-grade mobile and backend systems tailored exactly to your business logic. Whether it is a fast-paced fintech app, a real-time tracking system, or solutions in Real Estate and EV technology, I lead end-to-end product development. From initial Figma prototyping to scalable Node backend architectures and native iOS/Android deployment, I ensure your application is built for long-term scalability and top-tier performance. 💡 𝐂𝐨𝐫𝐞 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 ✅ Custom End-to-End Ecosystems (No Templates, No Shortcuts) ✅ Native iOS Development (Swift, SwiftUI, UIKit, Objective-C) ✅ Cross-Platform Mobile Solutions (Android & Hybrid) ✅ Scalable Backend Architecture (NodeJS, Express, REST APIs) ✅ Real-Time Communication (Socket io, WebSockets, SignalR) ✅ Database Management & Architecture (MongoDB, CoreData, CloudKit) ✅ UI/UX Prototyping & Technical Feasibility (Figma, Adobe XD) ✅ App Store & Google Play Console Deployment Support 🧠 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐒𝐤𝐢𝐥𝐥𝐬 • Mobile: Swift, SwiftUI, UIKit, Objective-C, Android SDK, CoreData, VisionKit • Backend: NodeJS, Express JS, Socket io, RESTful APIs, JSON Parsing • Databases: MongoDB, Realm, CloudKit, SQL • Frontend & Logic: JavaScript, jQuery, HTML5, CSS3, AJAX • DevOps & Tools: Git, GitHub, GitLab, Postman, CI/CD, MVC and MVVM Architecture • Deployment: App Store Connect, Google Play Console 📱 𝐓𝐲𝐩𝐞𝐬 𝐨𝐟 𝐀𝐩𝐩𝐬 𝐈 𝐁𝐮𝐢𝐥𝐝 • Real Estate & PropTech Solutions • EV Technology & Smart Infrastructure Apps • Real-Time Tracking & Map-Based Platforms • Enterprise Business & SaaS Applications • Financial & Custom Calculator Tools • Custom Marketplace & E-Commerce Ecosystems 🌟 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 ✔ 7+ Years of Mastery: Proven track record in both mobile and server-side engineering. ✔ Proprietary & Custom Code: No reliance on plugins; pure, maintainable, and high-performance code. ✔ Pixel-Perfect Execution: Translating complex Figma designs into responsive, fluid UIs. ✔ End-to-End Leadership: I take ownership of requirement analysis, architecture, testing, and deployment. ✔ Reliable Communication: Direct, transparent updates and flexible timezone availability. 🔧 𝐃e𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐏𝐫𝐨𝐜𝐞𝐬𝐬 1️⃣ Requirement Analysis & Architectural Planning 2️⃣ High-Fidelity UI/UX & Technical Feasibility Check 3️⃣ Scalable Full-Stack Development (Mobile + Backend) 4️⃣ Rigorous Testing, Optimization & Quality Assurance 5️⃣ App Store & Play Store Deployment 6️⃣ Post-Launch Support & Maintenance 📅 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲 ⏰ 40+ Hours Per Week 🤝 Long-Term & Short-Term Projects 💬 Dedicated and Responsive Communication 🌍 Flexible with Global Time Zones 📩 If you are ready to bypass rigid templates and build a secure, high-performance, custom-coded system for your business, let’s connect. Message me today to discuss your project's architecture!

Greetings! I’m an experienced iOS and full-stack developer with 10+ years of building great apps and developing smart, efficient solutions. Skills & Technologies I Work With: --- Mobile Development: Swift, SwiftUI, Objective-C, React Native --- Frontend: React, Next.js (SSR), TypeScript --- Backend: Node.js, Express, Python, FastAPI, Flask --- Databases & APIs: SQL, MongoDB, Firebase --- Cloud Services: AWS (OpenSearch, Lambda, CloudFormation, RDS, Amplify), Azure, Firebase --- Payments & Authentication: Stripe, Plaid, Auth0 I look forward to hearing from you!

⭐ "Zain went above and beyond, delivered fast, and improved our product thinking. I would definitely work with him again." — CPO, USA As a Lead Mobile Engineer and Architect, I specialize in transforming complex ideas into robust, scalable, and high-performing mobile applications across both iOS and Android platforms. With over 8 years of hands-on experience and a proven track record of delivering 100+ successful apps, I am an expert in architecting sophisticated real-time systems, including chat, voice/video calls, and live streaming functionalities, leveraging cutting-edge technologies like SwiftUI, Firebase, and WebRTC. My role extends far beyond writing code. I provide end-to-end mobile strategy and technical leadership, guiding projects from initial MVP development through to scaling for millions of users. I am adept at ensuring best practices in mobile architecture (MVVM-C, Clean Architecture), conducting thorough code reviews, implementing stringent security audits, and facilitating seamless SDK integrations. My expertise also includes modernizing legacy applications and performing forensic app rescues to stabilize and optimize existing mobile products.What I Bring to Your Team:• Architectural Vision: Designing scalable, maintainable, and secure mobile architectures. • Technical Leadership: Mentoring teams, driving best practices, and ensuring high-quality code delivery. • Problem Solving: Tackling complex technical challenges, from performance optimization to bug resolution. • Real-Time Expertise: Building interactive and engaging real-time communication features. • Cross-Platform Strategy: Advising on and implementing solutions for both native iOS and Android ecosystems. Whether you need a visionary to lead your mobile development efforts, a seasoned architect to optimize your existing app, or a specialist to navigate complex technical challenges, I deliver mobile products that not only function flawlessly but also drive significant business growth.Ready to build your next market-leading mobile product or elevate your existing one? Let's connect for a consultation to discuss your vision and how I can help you achieve it. Keywords: Mobile App developer, Kotlin and Swift developer, mobile app development, Firebase, WebRTC, chat app development, real-time apps, video calling app, MVP development, startup apps

I specialise in developing, fixing, and reviewing iOS and Android applications, including native and cross-platform apps, where performance, reliability, and user experience are critical. 💰 60+ apps shipped, generating over 18 figures in revenue. ⚡ AI speed combined with +10 years of production experience to deliver code that ships fast, feels premium, and scales without cracking. ✅ 7000+ hours and still counting ✅ 100% Job Success (Client Satisfaction Ratio) ✅ 10+ Years Of Experience ✅ High-Quality Work and budget-friendly Whether you're a startup, business, or building an MVP, you’ll get high-quality services at an affordable cost. Interested? Click “Invite to Job” and let’s discuss your project. 🔥Skills and experiences - AI, ChatGPT, Claude AI, Codex, Cursor, OpenAI, AI chatbots - Native iOS and Android app development (Swift, SwiftUI, Objective-C, Java and Kotlin) - React Native - Interaction with backend - Rest API, JSON, XML - Firebase, Supabase, FCM, FireStore, Firebase Analytics - SDK implementation - Social Integration – Facebook, Twitter, Instagram, Google, Apple - Google Maps, Apple Map kit, Geolocation, GPS, Location Tracking - Audio / Video Live Streaming - Paywall, Push notification - QR Codes, Bar Codes, VIN, NFC Tags Reading - Design: Figma, Zeplin, Photoshop - Tracking: Mixpanel, Segment, Firebase Analytics, Meta Events, Appsflyer Just click on the '𝗜𝗻𝘃𝗶𝘁𝗲 𝘁𝗼 𝗝𝗼𝗯' button and experience yourself.🙌 Let's connect!

✔︎ 𝟕+ 𝐘𝐞𝐚𝐫𝐬 of Experience in 𝐌𝐨𝐛𝐢𝐥𝐞 & 𝐖𝐞𝐛 Development ✔︎ 𝟓𝐌+ $ 𝐟𝐮𝐧𝐝𝐢𝐧𝐠 raised by clients ✔︎ 𝟑𝐌+ 𝐚𝐩𝐩 𝐝𝐨𝐰𝐧𝐥𝐨𝐚𝐝𝐬 | 𝟑𝟎+ 𝐩𝐮𝐛𝐥𝐢𝐬𝐡𝐞𝐝 𝐚𝐩𝐩𝐬 ✔︎ 𝐁𝐨𝐨𝐬𝐭𝐞𝐝 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐯𝐢𝐭𝐲 𝐛𝐲 𝟒𝟎% using AI Tools like GitHub Copilot & Cursor 🎨 𝐌𝐮𝐥𝐭𝐢𝐩𝐥𝐞 𝐃𝐞𝐬𝐢𝐠𝐧 𝐈𝐭𝐞𝐫𝐚𝐭𝐢𝐨𝐧𝐬 Until 100% Satisfaction Guaranteed
 ⚡ 𝟭 𝗛𝗼𝘂𝗿 𝗥𝗲𝘀𝗽𝗼𝗻𝘀𝗲 𝗧𝗶𝗺𝗲 | Available 𝟭𝟴 𝗛𝗼𝘂𝗿𝘀/𝗗𝗮𝘆 𝐑𝐚𝐧𝐤𝐞𝐝 𝐀𝐦𝐨𝐧𝐠 🌟 𝐓𝐨𝐩 𝟐% 𝐌𝐨𝐛𝐢𝐥𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫𝐬 𝐨𝐧 𝐔𝐩𝐰𝐨𝐫𝐤 I help startups and businesses build 𝐌𝐕𝐏𝐬, prototypes, and full-scale apps 𝟐𝐗 𝐅𝐚𝐬𝐭𝐞𝐫 saving 50%+ in time and cost while delivering 𝐈𝐧𝐯𝐞𝐬𝐭𝐨𝐫-𝐑𝐞𝐚𝐝𝐲, 𝐒𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬. 🧠 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: ------------------------------ 🔹 Frameworks: Flutter, FlutterFlow, Dart, React Native 🔹 Mobile Platforms: Android, iOS, Native SDKs 🔹 AI/ML & Deep Learning: Python, NumPy, Pandas, Scikit-learn, TensorFlow, PyTorch, Computer Vision 🔹 AI Integration: OpenAI (GPT), LangChain, Dialogflow, ElevenLabs, Deepgram 🔹 Backend & DB: Firebase, Supabase, Node.js, PHP, Strapi, MongoDB, MySQL, SQLite 🔹 API Integration: REST, GraphQL, JSON, XML 🔹 Payments: Stripe, Razorpay, Braintree, PayPal 🔹 Real-Time Features: Chat, WebSocket, Push Notifications, In-App Purchases 🔹 Cloud & DevOps: AWS, Azure, Google Cloud, GitHub/GitLab/Bitbucket 🔹 Multimedia & Sensors: Live Streaming, GPS, QR/NFC, iBeacon, Audio/Video 🌍 𝗜𝗡𝗗𝗨𝗦𝗧𝗥𝗜𝗘𝗦 𝗦𝗘𝗥𝗩𝗘𝗗: ------------------------------ 🛍️ 𝐑𝐞𝐭𝐚𝐢𝐥 & 𝐞𝐂𝐨𝐦𝐦𝐞𝐫𝐜𝐞 | 🏥 𝐇𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞 | 💰 𝐅𝐢𝐧𝐭𝐞𝐜𝐡 🏡 𝐑𝐞𝐚𝐥 𝐄𝐬𝐭𝐚𝐭𝐞 (𝐈𝐃𝐗/𝐌𝐋𝐒) | 🎓 𝐄𝐝𝐮𝐜𝐚𝐭𝐢𝐨𝐧 | 🚚 𝐋𝐨𝐠𝐢𝐬𝐭𝐢𝐜𝐬 & 𝐓𝐫𝐚𝐧𝐬𝐩𝐨𝐫𝐭 🏭 𝐌𝐚𝐧𝐮𝐟𝐚𝐜𝐭𝐮𝐫𝐢𝐧𝐠 | 🏨 𝐓𝐫𝐚𝐯𝐞𝐥 & 𝐇𝐨𝐬𝐩𝐢𝐭𝐚𝐥𝐢𝐭𝐲 | ⚽ 𝐒𝐩𝐨𝐫𝐭𝐬 & 𝐁𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐀𝐩𝐩𝐬 ----------------------------------------------- 🏆 Why Clients Love Working With Me: ----------------------------------------------- ✦ Daily updates + fast communication ✦ Clean, scalable code & modern UX ✦ Strong mobile + web architecture ✦ On-time delivery & post-launch support free ✦ Flexible with timezone & project scope Let’s build something great — message me with your idea, and I’ll help bring it to life.

I build and ship mobile apps that people actually use. iOS (Swift), Android (Kotlin), Flutter, React Native, from first prototype to App Store and Google Play launch. 95 projects delivered. 100% Job Success. 78% of my clients come back for more work. I run a small in-house dev team of 5, and I personally lead every project. You get the speed and bandwidth of a team with the direct communication of working with a senior developer. No account managers, no hand-offs to juniors you have never spoken to. 𝐖𝐡𝐚𝐭 𝐈 𝐰𝐨𝐫𝐤 𝐨𝐧: • Native iOS and Android apps (Swift, Kotlin) • Cross-platform apps (Flutter, React Native) • AI and LLM-powered mobile apps (chatbots, content generation, AI coaches, vision-based features) • Full-stack backends (Node.js, Firebase, Supabase, PostgreSQL, MongoDB) • MVP and prototype development for startups • Bug fixes, performance optimization, and feature additions to existing apps 𝗔𝗽𝗽𝘀 𝗜 𝗵𝗮𝘃𝗲 𝘀𝗵𝗶𝗽𝗽𝗲𝗱 𝗮𝗰𝗿𝗼𝘀𝘀: • Social networking, maps and geolocation • Fintech and payments • Fitness and health coaching • Real estate and property management • Safety and emergency response • AI chat, image and video generation • Healthcare, e-commerce, food and hospitality My work includes subscription and in-app purchase flows (RevenueCat, StoreKit), ScreenTime API, push notifications, real-time feeds, offline-first architecture, background location tracking, and Live Activities on iOS. 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸: We scope the project together, break it into weekly milestones, and I ship testable builds every week. I also use AI tools like Claude to speed up documentation, code review, and testing, saving you time and money without cutting corners on quality. Whether you have a Figma design ready, a rough idea on paper, or an existing app that needs new features, message me and let us talk about your project. I usually reply within a few hours. Warm regards, Maulik

Hi! I’m a Senior iOS Engineer with 5+ years of experience building polished apps for iOS, macOS, watchOS, tvOS, and iPadOS. I specialize in Swift and SwiftUI, with a focus on performance, clean architecture, and smooth App Store approvals. Whether you need a full app from scratch, a SwiftUI migration, or AI integration, I’m here to help you ship faster and scale smarter. 🔧 What I Deliver ✅ Native iOS Development (Swift, SwiftUI, UIKit, Combine) ✅ Full-cycle delivery: design → code → App Store launch ✅ UIKit > SwiftUI migrations, crash reduction, tech-debt cleanup ✅ Offline-first architecture (Core Data / Realm) ✅ Firebase, REST & GraphQL API integrations ✅ Apps for iOS, macOS, tvOS, watchOS ✅ App Store Optimization (ASO), testing, CI/CD, deployment 💡 Past Results - Rebuilt and launched SwiftUI-based iOS apps for EU and US clients in categories like business, lifestyle, and utilities. - Migrated UIKit legacy codebases to SwiftUI, improving maintainability and reducing crash rates. - Developed and published apps for iPadOS, macOS, and tvOS in full alignment with Apple’s design and technical guidelines. - Integrated REST and GraphQL APIs into SwiftUI apps using testable MVVM architecture. - Helped clients pass App Store review on first submission by strictly following Apple’s HIG and privacy rules. - Added chat features and AI components using tools like OpenAI’s ChatGPT API, including basic chatbot flows and smart content generation. 🛠️ Stack & Tools Swift • SwiftUI • UIKit • Combine • Firebase • Realm • GraphQL • REST • RevenueCat Xcode 15 • Git • Figma • Jira • Postman • RxSwift • Core Bluetooth • ARKit 🌍 Communication & Availability 🇪🇺 Based in Central Europe (UTC+2) 🕓 Full EU overlap | US-friendly hours for long-term projects 📣 Daily Slack/Email + async Loom updates - no chasing progress 🤝 Why Hire Me ✅ SwiftUI-native mindset = faster delivery & better maintainability ✅ Proven results = App Store launches, crash-free apps, clean transitions ✅ Clear updates = no guesswork, no delays ✅ B2B-friendly = long-term, NDA-secure partnerships welcome 📩 Let’s get your app shipped - clean, tested, and ready for the store. Send a message or invite to job!