I help founders and product teams ship and stabilize production systems across mobile + backend—especially when reliability, security, payments, and “edge cases in the real world” matter. I’m a former Capital One Staff Engineer (Payments) and have delivered work for organizations including the Library of Congress. I’m comfortable operating in production safely, debugging messy systems, and modernizing workflows without rewriting everything. Recent and notable work • CakeClub (iOS + Firebase): Turnaround to production-ready. Built a Firebase Cloud Functions v2 backend for budget calculations and transaction sync, secured Plaid token storage with encryption keys protected in Google Secret Manager, implemented Firebase App Check, integrated RevenueCat, added Crashlytics/Analytics, and created an admin panel with role-based access. Established QA + Production environments and CI (Xcode Cloud + GitHub Actions). • Genie AI: Contributed to shipping and stabilizing production workflows under real constraints, focusing on reliability and execution. What clients hire me for • Production stability: crashes, retries/double submits, inconsistent state, payments/webhooks • Shipping and launch closeout: TestFlight/internal testing → App Store / Play Store • Mobile + backend alignment: when client behavior and backend reliability interact under poor networks If you want a senior engineer who communicates clearly, works independently, and delivers production-safe improvements, I’m a good fit.

I help startups and businesses build high-performance mobile applications that are reliable, maintainable, and ready to scale. Many mobile apps become difficult to improve as they grow because of poor architecture, inefficient state management, and weak backend foundations. I build applications with clean architecture, optimized performance, and production-ready integrations so they remain stable as new features and users are added. Flutter is my primary framework for building cross-platform iOS and Android applications. My background in native mobile development (Swift and Kotlin) allows me to handle platform-specific requirements, native integrations, performance optimization, and complex mobile challenges when needed. What I do: - Develop native iOS and Android applications (Swift, Kotlin) - Build production-ready Flutter applications (Bloc/Riverpod/Provider) - Integrate Firebase, Supabase, REST APIs, and AI/LLM APIs - Implement payments with Stripe and in-app purchases - Optimize app performance, reduce unnecessary rebuilds, and improve responsiveness What I focus on in every project: - Clean, maintainable code built for long-term growth - Smooth user experiences under real-world usage - Backend integrations designed to support future expansion Recent project focus: - Startup MVP development - AI-powered mobile applications (chat, automation, API-driven features) - Scaling and refactoring existing Flutter applications - Performance optimization for production apps - Native mobile features and platform-specific integrations Whether you are launching a new mobile product or improving an existing application, I can help you build a stable foundation that performs well today and continues to scale in the future.

Five of my apps are live on the App Store right now. I build software that ships. I work across native iOS, cross platform mobile, web applications, and AI powered tools. Some projects I build from scratch and own end to end, and some I inherit half finished and take the rest of the way. I am equally comfortable either way, and I move fast without leaving a mess behind me. A few recent examples. I built a two sided marketplace app solo, from first commit to live on the App Store, including card and Apple Pay payments and subscriptions. I built a social travel app from an empty repo to TestFlight in six weeks. I rewrote a satellite GPS tracking app from 372 Objective-C files down to 40 Swift files without losing a single user's data, then took it through four App Store rejections to approval. And I traced a client's Android sales silently dropping to zero for three months to stale certificate pins inside an outdated payment SDK, killing every transaction before it reached the gateway. What I work in: Swift and SwiftUI, React Native and Expo, Flutter, Firebase and Supabase, Node and Python backends, Stripe and Square payments, AI and LLM integrations, and the full App Store and Google Play submission process from signed build to live listing. I have built HIPAA compliant medical applications, fitness and wellness platforms, marketplace apps with real money moving through them, internal business tools, and GPS connected IoT products. Clients endorse me for clear communication more than anything else. You will always know where your project stands, what is actually working, and what it will take to finish. Based in Texas, US based and available 30+ hours a week. English native, French fluent.

I help founders and business operators build, launch, take over, and scale business-critical mobile and web platforms. Most clients I work with are not just looking for “an app developer.” They usually have a real business workflow that needs to become software: customer portals, admin dashboards, booking systems, dispatch flows, marketplaces, SaaS products, AI-assisted tools, internal operations platforms, or existing products that need to be stabilized and improved. Across 100+ projects, I’ve helped companies turn complex product ideas and operational processes into reliable software used by real customers. The products I’ve worked on have supported 2M+ app downloads, large active user bases, revenue growth, and long-term business operations. HOW I CAN HELP 👉A single technical partner for the full product lifecycle I can support the full process: product planning, UX/UI design, mobile app development, web app development, backend development, REST API integrations, admin systems, QA, deployment, app store launch, and post-launch support. 👉Turning manual workflows into scalable platforms If your business currently depends on spreadsheets, emails, manual follow-ups, disconnected tools, or repetitive admin work, I can help turn that workflow into a structured product with clear roles, automation, notifications, reporting, and operational visibility. 👉Taking over and improving existing products If you already have a product but the codebase is messy, the previous developer disappeared, documentation is missing, or the app is hard to maintain, I can help audit the system, stabilize development, improve architecture, and create a safer long-term technical foundation. 👉Building MVPs that can grow after launch I focus on practical MVPs: the smallest version that proves the core workflow, supports real users, and does not become a throwaway prototype. The goal is not only to launch quickly, but to build something maintainable enough to keep improving. 👉Transparent collaboration You will always know what is being worked on, why it matters, and how much time was spent. I work with clear communication, structured project management, weekly progress reports, time tracking, QA cycles, and straightforward expectations. 👉Long-term support and ownership You own the product, the code, the accounts, and the direction. I can also support the product after launch with bug fixes, OS updates, monitoring, performance improvements, security checks, and ongoing feature development. BACKGROUND ✅10+ years of professional experience in mobile app development, web development, backend systems, product architecture, and long-term software support. ✅Worked on large-scale products for companies including Volkswagen, Bosch, and Invisalign. ✅Delivered mobile apps, web apps, backend systems, admin dashboards, AI features, marketplace-style platforms, and workflow-heavy business tools. ✅Strong experience with: - iOS, Android, React Native, Kotlin, Swift, SwiftUI, Jetpack Compose - Web apps, SaaS platforms, admin dashboards - Backend development, APIs, authentication, databases, cloud infrastructure - AI assistants, RAG, document search, workflow automation - QA, deployment, app store release, monitoring, and support My focus is simple: understand the business problem, build the right product, communicate clearly, and stay available after launch. If you need a reliable technical partner for a serious mobile, web, SaaS, AI, marketplace, or operations platform, send me a message and I’ll walk you through the safest way to build or improve it.

I am an independent iOS developer operating through L&L Programming LLC with a proven track record of starting new projects and taking them through development all the way to the app store. I enjoy taking on new challenges and solving complex programming tasks. - Top rated developer - Proficient in the Swift programming language - Bachelors in Engineering - Dedicated and self motivated to get projects done right and on time - Friendly, with good customer service skills

𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 𝐅𝐫𝐞𝐞𝐥𝐚𝐧𝐜𝐞𝐫 | $𝟕𝟎𝐊+ 𝐓𝐨𝐭𝐚𝐥 𝐄𝐚𝐫𝐧𝐢𝐧𝐠𝐬 | 𝟓𝟎+ 𝐒𝐮𝐜𝐜𝐞𝐬𝐬𝐟𝐮𝐥 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 | 𝟏,𝟎𝟎𝟎+ 𝐇𝐨𝐮𝐫𝐬 𝐎𝐧 𝐑𝐞𝐜𝐨𝐫𝐝 | 𝐔𝐩𝐰𝐨𝐫𝐤-𝐕𝐞𝐫𝐢𝐟𝐢𝐞𝐝 𝐄𝐧𝐠𝐥𝐢𝐬𝐡 𝐅𝐥𝐮𝐞𝐧𝐜𝐲 | 𝐂𝐨𝐧𝐬𝐢𝐬𝐭𝐞𝐧𝐭 𝟓★ 𝐂𝐥𝐢𝐞𝐧𝐭 𝐅𝐞𝐞𝐝𝐛𝐚𝐜𝐤 🚀 Hey, I’m Shahid Shakeel 👨‍💻 I’m a Senior Mobile App Developer with over 5 years of professional experience. My core expertise lies in iOS and macOS development, complemented by hands-on experience with Flutter and React Native for cross-platform apps. I also work with Firebase, Supabase, and OpenAI to deliver robust, intelligent backends. 💡 What I Build: 📱 iOS/macOS Apps – High-performance native apps built in Swift and Objective-C. 🌍 Cross-Platform Solutions – Beautiful, responsive apps using Flutter and React Native. 🔗 Smart Integrations – Real-time data, AI features, and scalable infrastructure powered by Firebase, Supabase, and OpenAI. 🎯 Why Choose Me: ✅ Precision-focused UI/UX for a seamless experience. ⚡ Up-to-date with modern frameworks and best practices. 🛠️ Long-term reliability, updates, and technical support. 🌟 Highlighted Work: 🌿 AI Plant Identifier – Recognizes plants instantly using CoreML. 👶 AI Baby Face Generator – Generates baby predictions with advanced AI models. 🚀 Let’s create something exceptional, from idea to App Store launch. Drop me a message, and let’s get started!

Have an innovative app idea, an MVP you want to launch, or a prototype that got stuck along the way? Maybe you're starting from a simple concept. Or maybe you already got pretty far with tools like Lovable, Bubble, Replit, Cursor, or Claude Code, and now you need someone to fix it, finish it, and get it launched. Either way, I can help turn what you have into something your customers will love to use. I help founders and businesses turn ideas into AI-powered products, internal tools, and scalable software, without wasting months or tens of thousands of dollars. Client results: • $350M+ raised by clients • 2M+ users on apps I designed and developed • 10K+ five-star reviews across apps built • Top 1% in App Design & Development on Upwork A few years ago, I was sitting exactly where many of my clients are today: trying to turn an idea into an app. I was looking for freelancers, tried to build it myself and hired the wrong teams. It was a nightmare to say the least. After years of mistakes and learning to code, I finally launched SchooLinks, which grew into an Inc. 5000 company and raised over $90 million. Since then, I've helped more than 150 founders launch products across SaaS, marketplaces, AI tools, mobile apps, and internal platforms... some of which have made it to Forbes. Book your consultation today! I'll save you months of frustration by helping you understand the ins and outs of bringing an app or platform to life: how much it costs, how long it takes, what the process looks like and more. Already have a build? Bring the link and I'll assess exactly what's salvageable and what it needs to launch. The apps I've built come in the form of: SaaS platforms, internal platforms, mobile & web apps, marketplace apps, and MVPs rescued from AI and no-code tools. Trusted By: Harvard, Samsung, Indeed, Yamaha, University of South Florida, and more. Technologies: Claude Code, Cursor, OpenAI, Gemini, Flutter, React Native, Node.js, Angular, AWS, MongoDB, Figma If you're serious about building your app the right way, let's talk!

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

If you are looking for a motivated, safe set of hands to take the weight of your project off your shoulders and work with you to get the job done right, then let’s have a chat. Here’s how: 1. Send me an Upwork message 2. On Upwork message, click on the green “Schedule a meeting” button, choose 30 minutes and I will confirm a time slot. 3. That way we can hop on a strategy call to discuss your project further and make sure we are a great fit together. I lived in Drexel HIll, PA. I am a motivated and creative US based freelancer with over 10 years of successful freelancing in multiple areas of Web & Mobile development. I have experience in ReactJS, NextJS, NodeJS, AngularJS, JavaScript, Laravel, CodeIgniter, Cake PHP, Rest APIs, and WordPress. Expert in React Native Mobile Applications Enterprise level Web | Mobile applications ✔ Detailed experiences are: 1) Backend Development • PHP - Laravel MVC, CodeIgniter, Cake PHP • Node.js - Express, Socket.io, Meteor • Python - Django, Flask • MYSQL, MongoDB, NoSQL, Firebase 2) Front-end Development • Angular, React.js, NextJS, Vue.js • CSS/SCSS, HTML, JavaScript, Jquery 3) iOS | Android app Development • Swift, Java, Kotlin, React Native, Ionic, Flutter • RxJava, RxSwift • MVP, MVVM My priorities are - - Best quality - Bug-free - Delivery in a timely manner - Developing an app, testing it, and making sure users won't have any problems when using the final product; - Helping to choose the best tools for analytics, testing, marketing, reporting, and more.

🚀 Top-Rated and Expert-Vetted Senior iOS Developer with 10 Years of Mobile Expertise 📱 Are you in need of a seasoned iOS developer with a wealth of experience and a proven track record in building top-notch mobile apps? Look no further! I'm here to enhance your projects and take them to new heights. ✨ Why You Should Collaborate with Me: 📚 Master's Degree in Computer Science: My deep academic background ensures a strong foundation in software engineering principles, empowering me to craft efficient, high-quality code. 🤝 Proactive and Detail-Oriented: I bring a proactive mindset and keen attention to detail to every project, delivering not just solutions but polished products that shine. 🌍 Global Experience: I've partnered with startups worldwide, from the USA and UK to The Netherlands. This international exposure has enriched my skill set and allows me to bring diverse perspectives to your projects. 📱 Full-Stack Expertise: I specialize in developing native iOS apps using Swift, creating elegant and intuitive user interfaces and experiences. From ground-up builds to enhancing existing apps, I do it all. 🤖 Collaborative Cross-Functional Work: I thrive in cross-functional teams, collaborating seamlessly with product owners, designers, mobile developers, and backend experts to create holistic solutions. 🧩 Strong Problem-Solving Skills: Complex challenges don't deter me; I embrace them with analytical prowess and innovative thinking. 🏆 Recent Achievements: 🌟 I spearheaded the development of an e-commerce app for an Amsterdam startup that raised a staggering $120 million. 🌟 Another success story is a second phone number app, delivering calls and messaging features. Ready to take your projects to the next level, I'm excited to work with you and your team. Let's build the future together! 📈💼📱 ⚙️ Tools and Skills: 🛠️ Development Tools: Xcode Swift SwiftUI RxSwift Combine Apollo GraphQL Jira Confluence Git SwiftLint SwiftGen Dependency Injection 🎨 UI/UX Design: Figma Sketch Interface Builder Storyboards SwiftUI Preview Lottie 🧩 Frameworks and Libraries: Alamofire Moya Facebook SDK Algolia Iterable RevenueCat Twilio Stripe Realm Stream Chat One Signal Kingfisher 📱UI: UIKit Foundation SnapKit 📊 Analytics: Segment Firebase Google Analytics Mixpanel Amplitude Rollbar Crashlytics 🐞 Debugging and Testing: XCTest XCUITest Quick Nimble SwiftyMocky Embassy EnvoyAmbassador RxBlocking 🏛️ Architecture: Multi-modular, MV MVC MVP MVVM VIPER 📋 Methodologies: Agile Scrum Kanban 🚀 CI: Bitrise Jenkins