I help startups and product teams fix unstable mobile apps, improve performance, and scale production systems, including apps with AI features, without breaking existing functionality. Clients usually come to me when their app is already live but facing issues that impact users, stability, or revenue. Common problems I solve: • Frequent crashes, ANRs, and unpredictable app behavior • Slow performance, memory leaks, and poor responsiveness • Payment failures or unreliable API integrations • AI features (chat, recommendations, automation) not working reliably • New features breaking existing functionality • Legacy code that is difficult and risky to modify Results I’ve delivered: • Reduced app crash rates by up to 40% by identifying and fixing root causes • Improved app performance and load times by optimizing memory usage and API handling • Stabilized production apps used by thousands of active users • Resolved critical API, payment, and backend integration issues • Integrated and improved AI-based features within mobile apps What I work on: • Native iOS & Android applications in production • Flutter (cross-platform) mobile apps • AI-powered features (chat, recommendations, automation workflows) • Payment gateway integrations and complex API workflows • Debugging crashes, ANRs, memory issues, and performance bottlenecks • Code refactoring, architecture improvements, and long-term maintainability • App Store & Play Store submissions, updates, and compliance How I work: • I solve root problems, not temporary fixes • I prioritize stability before adding new features • I write clean, maintainable, and scalable code • I leverage modern AI tools to speed up development, debugging, and testing while maintaining high code quality • I communicate clearly and take ownership of delivery • I ensure new changes do not break existing functionality CTA: If your app is facing crashes, performance issues, or unreliable features, send me a quick message with the details. I’ll review your app and suggest the fastest, safest way to fix and improve it.

Need help with mobile app, game, and web app development? Feel free to contact me any time for your project! I am just one click away from finding the right solution for you. 10+ years of experience in the field of software applications developed on Microsoft technologies, including MAUI, Xamarin (Xamarin.Forms, Xamarin.iOS, and Xamarin.Android), I have developed a wide range of mobile applications for smartphones and tablets. I have been spending every spare minute writing code for the iPhone and Android as well and learning everything about mobile application development. I'm mainly interested in mobile app development, but I'm able to handle cross-client development including backend/API and web applications. ******** My skills ********* ✅ Xamarin app development (C#, Native, Forms, Android, iOS, Telerik SDK) ✅ .NET MAUI App development (Xamarin Forms to .NET MAUI Migration) ✅ Programming language: C#, .NET ✅ Android app development (Java, Kotlin, Google Play Store) ✅ IOS app development (Swift, Objective-C, App Store) ✅ Database (SQLite, SQL Server, MySQL, Firestore) ✅ 3rd Party API Integration (Facebook, Twitter, Vimeo, Pinterest, YouTube, Google+ API) ✅ Google Maps, GPS, Current Location, Google Places, Markers ✅ Payment System (Stripe, PayPal, PayTM, BrainTree, WePay, Credit Card, PayPalHere, iZettle, Vantiv, Tyro, Mint, and AssemblyPayment) ✅ Pixel-perfect, interactive, and complex UI ✅ MVVM Pattern and MVVM Framework like Prism, MVVMLight, and MVVMCross ✅ Local SQLite DB integration and Entity Framework Core with SQLite ✅ Flight mode safe application - Online-Offline data synchronisation in background. ✅ Hardware integration -Barcode scanner. which are connected through the LAN, WiFi & Bluetooth. ✅ Convert Native libraries/SDK into C# ✅ API integration (SOAP, REST, JSON, XML, XMLRPC) ✅ Push Notification (Local and cloud - APNS, Firebase) ✅ Real-Time communication integration - Firebase, PubNub, SignalR and many more ✅ Chatting Implementation & Integration. ✅ Social App Integration (Google, Facebook, LinkedIn, Twitter) ✅ Barcode Scanning & Generating ✅ QR Code Scanning & Generating ✅ MagStripe Reader (Swipe card) & NFC Reader ✅ Map Integration ✅ Deep linking using Firebase DynamicLink ✅ Google AdMob integration ✅ Parse API integration. ✅ Unit Testing, Sanity Testing, Integration Testing ✅ Azure, Firebase, AWS ✅ GitHub, Azure DevOps, AppCenter, JIRA, Bitbucket ✅ Hands-on experience leveraging AI-powered development tools such as GitHub Copilot, Claude Sonnet 4.5, and GPT-5.2 to accelerate code generation, debugging, and documentation. ✅ Clean Code ✅ Apple and Google In-App purchase integration ✅ Publish app on AppStore and PlayStore ****** Stack of Web Technologies ******* ✅ Knowledge of Frameworks: PHP- Laravel ✅ Knowledge of HTML, Ajax, XML, JSON, CSS ✅ Knowledge of JS libraries: JQuery, JQuery UI, YUI, etc. ✅ Knowledge of template engines: Twig, Smarty ✅ Knowledge of the Bootstrap framework ✅ Knowledge of CSS preprocessors: SASS, LESS ✅ Skills with databases: MySQL, Oracle, MS SQL, Firebird, PostgreSQL ✅ Knowledge of NoSQL: MongoDB, Redis, Memcached ✅ Knowledge of OOP, SOLID and MVC concepts ✅ Skills with VCS: Git, SVN ✅ Skills with the Composer dependency manager ✅ Experience with server-side JS: Node.js, Express.js, WebSockets ✅ Experience with virtual machine configuration with Vagrant and Puppet ✅ Experience with payment gateways: Pay_Pal, Authorize.Net, Solid Payments ✅ Skills with social networks API: Facebook, Twitter, Instagram, OK, VK ✅ Skills with GIS: Google Maps API, Yandex Maps API, VNetGIS ✅ Knowledge of MaxMind API, minFraud API ✅ Skills with the Photoshop graphics editor ✅ Basic knowledge of HTML Canvas and Flash ******Game Development: ✅ Unity 2D/3D games ✅ Game Development What is the difference between other developers and me, and why should you hire me? ✅ Develop mobile apps by following Apple, Google, and Windows development guidelines. ✅ Always reply quickly and give my 100% dedication to your project to make it live. ✅ 100% Job Success ✅ 100% Client Satisfaction

Hello there! 👋 𝐖𝐚𝐧𝐭 𝐭𝐨 𝐭𝐮𝐫𝐧 𝐲𝐨𝐮𝐫 𝐢𝐧𝐧𝐨𝐯𝐚𝐭𝐢𝐯𝐞 𝐢𝐝𝐞𝐚𝐬 𝐢𝐧𝐭𝐨 𝐫𝐞𝐚𝐥𝐢𝐭𝐲 𝐰𝐢𝐭𝐡 𝐚 𝐝𝐲𝐧𝐚𝐦𝐢𝐜 𝐚𝐧𝐝 𝐫𝐞𝐬𝐮𝐥𝐭-𝐨𝐫𝐢𝐞𝐧𝐭𝐞𝐝 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫? 𝐋𝐨𝐨𝐤 𝐧𝐨 𝐟𝐮𝐫𝐭𝐡𝐞𝐫! I am a highly skilled, result-oriented mobile app developer with vast experience in turning innovative ideas into efficient, eye-catching, and user-friendly applications. I specialize in developing top-notch, custom mobile apps for both iOS and Android platforms, utilizing the latest technologies and trends. My ultimate goal is to provide you with reliable, innovative, and enjoyable digital solutions that elevate your business. 𝐌𝐲 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐢𝐧𝐜𝐥𝐮𝐝𝐞𝐬 : ➤ Native Mobile App Development: Swift (iOS), Java & Kotlin (Android) ➤ Cross-platform Mobile App Development: React Native & Flutter ➤ Backend Development: Node.js, Express.js, PHP, Laravel, and Firebase ➤ APIs & Web Services: RESTful API, GraphQL, JSON, and SOAP ➤ Databases: SQLite, MySQL, PostgreSQL, and MongoDB ➤ UI/UX Design: Adobe XD, Sketch, Figma, and Photoshop ➤ Version Control & CI/CD: Git, GitHub, Bitbucket, and GitLab ➤ Agile & Scrum workflow methodologies 𝐌𝐲 𝐆𝐞𝐧𝐞𝐫𝐚𝐥 𝐏𝐫𝐨𝐯𝐞𝐧 𝐖𝐨𝐫𝐤𝐟𝐥𝐨𝐰 𝐩𝐫𝐨𝐜𝐞𝐬𝐬 : ➤ Project Understanding 🤔 - Detailed discussions to grasp your mobile app needs and vision ➤ UX/UI Design ✍️ - Crafting an exquisite design that prioritizes user experience ➤ Development 🔨 - Bringing your idea to life using cutting-edge tech & best practices ➤ Testing & QA ✅ - Rigorous checks for seamless functionality and smooth performance ➤ Deployment 🚀 - Launch to the respective app stores & ongoing maintenance 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈'𝐯𝐞 𝐖𝐨𝐫𝐤𝐞𝐝 𝐖𝐢𝐭𝐡 : ➤ E-commerce and Retail ➤ Healthcare and Fitness ➤ Finance and Fintech ➤ Travel and Hospitality ➤ Social Media and Entertainment ➤ Education and e-Learning ➤ Real Estate and Construction, and many more! 𝗪𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞? : ✅ Expertise: A proven track record of successful mobile app development projects ✅ Passion: I genuinely love what I do, and am constantly upskilling and learning ✅ Communication: Fluent English speaker and quick response rate ✅ Dedication: Ensuring deliverables are always on time 🕒 and within budget 💰 ✅ Satisfaction: Unwavering commitment to ensuring you are 100% satisfied Ready to turn your dream into a stunning mobile app? 📱 💡 𝐋𝐞𝐭'𝐬 𝐠𝐞𝐭 𝐬𝐭𝐚𝐫𝐭𝐞𝐝! 🚀 📩 Don't hesitate to hit the "𝐇𝐢𝐫𝐞 𝐌𝐞" button, send a message, or invite me to your project - and I'll be more than happy discuss your app idea and provide a custom-tailored proposal just for you. Remember, a small conversation can lead to extraordinary outcomes! 😊

🏆 Top Rated Plus | 100% Job Success | 9+ Years Experience 🚀 ✅ $15M+ Raised by my Clients | 10M+ App Downloads 🚀 ✅ Top 1% Upwork Freelancer | $1M+ Earned 🏆 I help startups, founders, and businesses build scalable Web Applications, Mobile Apps, SaaS Platforms, and AI Solutions that are designed to launch fast, grow efficiently, and deliver real business results. Whether you need an MVP, SaaS platform, CRM, AI-powered application, dashboard, marketplace, or mobile app, I can take your product from idea to deployment. 🎯 Ideal Clients ✅ Startup Founders launching an MVP or first product ✅ Funded Startups scaling an existing app or platform ✅ Agencies needing a reliable development partner for overflow work ✅ Businesses wanting to add AI features to an existing product 🏭 Industries Served ✅ Healthcare & HealthTech ✅ E-commerce & Retail ✅ SaaS & B2B Platforms ✅ FinTech ✅ Marketplaces & On-Demand Apps 🔑 KEY FEATURES & INTEGRATIONS ✅ AI & ChatGPT/OpenAI API Integrations ✅ Payment Gateways (Stripe, PayPal, Razorpay) ✅ Firebase, AWS, Google Cloud, Supabase ✅ Real-Time Chat & Push Notifications ✅ Admin Panels & Analytics Dashboards ✅ App Store & Play Store Deployment Why 400+ Clients Worldwide Trust Me: ✅ $15M+ Client Funding ✅ 10M+ App Downloads ✅ $1M+ Upwork Achiever ✅ 400+ Apps and 50+ Websites Launched ✅ Top Rated Plus (Top 3% on Upwork) ✅ 100% Job Success Score ✅ 38,857+ Hours Worked ✅ 86% Long-Term Repeat Clients Expertise: - Full Stack Development (React.js, Next.js, Node.js, NestJS, TypeScript) - Mobile App Development (Flutter, React Native, iOS) - AI & ChatGPT Integrations (RAG, LLM Integration) - SaaS Platforms & Business Applications 🔍 KEYWORDS Full Stack Developer, React Developer, Node.js Developer, Flutter Developer, React Native Developer, iOS Developer, MERN Stack Developer, NestJS Developer, AI Developer, AI Integration, ChatGPT Integration, OpenAI API, Claude API, RAG, LLM Integration, Lovable.AI, Bolt.new, SaaS Development, MVP Development, Mobile App Developer, GraphQL, RESTful API If you're looking for a development partner who values quality, communication, and long-term success, click the Invite or Message button and let's discuss your project.

🚀 Expert Freelance Flutter Developer | Building High-Performance Mobile & Web Apps for iOS, Android & the Web 🌍📱✨ ✅ Top Rated ✅ 17+ Jobs Completed ✅ 5+ years of Experience Mobile App Development ✅ 4+ years of Freelancing Experience ✅ Availability I will develop a professional cross-platform MOBILE app using Flutter. I have Five-plus years of experience in Flutter mobile app development. I can help you build a professional mobile application with the best performance and user experience. Flutter || Flutter Web || Firebase Authentication using Firebase Logins with social networks and email Google Maps Mapbox and Open Street Map Push Notification Local Notification API integration Ads implementation Phone Authentication In-app purchases and payment systems Database using Firebase or MySQL, SQLite Animations Camera, location, Cloud Messaging Streaming Supabase

Mobile App Developer and React Native Developer focused on building high-quality iOS and Android apps for startups and growing businesses. I help founders and teams launch new mobile apps, improve existing products, fix performance issues, and ship features faster using React Native, Flutter, Swift, and native Android technologies. If you’re hiring because you need certainty (not “hours”), here’s what you get: ✅ A clear build plan (milestones, scope, timeline, risks) before we start ✅ App Store-ready delivery (builds, signing, TestFlight, Play Console) ✅ Scalable code (TypeScript/Dart patterns, modular structure, maintainable UI) 𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝗱 (𝗮𝗻𝗱 𝘄𝗵𝗮𝘁 𝗜’𝗺 𝘀𝗲𝗮𝗿𝗰𝗵𝗲𝗱 𝗳𝗼𝗿): • React Native App Development (TypeScript, Expo, native modules when needed) • Flutter App Development (Dart, pixel-perfect UI, smooth animations) • iOS Developer work (Swift / SwiftUI) for native features & performance • Android (Kotlin) for platform-specific modules • Firebase backend (Auth, Firestore, Cloud Functions, Push Notifications) • Payments (Stripe), Maps, Chat, Real-time + Offline Sync 𝗣𝗿𝗼𝗼𝗳 & 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝘆 𝘀𝘁𝘆𝗹𝗲: • 100% JSS | $100K+ earned | 4000+ hours | 34+ projects • Figma → working app with matching UI, responsiveness, and edge cases covered • Regular updates + clean documentation so you’re never guessing progress If you need a mobile developer who can take ownership and move fast without creating chaos, send me a message with your app details.

Flutter SaaS and Mobile App Developer | Flutter, Laravel, Node.js, Firebase, AWS | 13+ Live Apps Hey, I am Amandeep Kaur, a Senior Flutter Full-Stack Developer with 6+ years of experience building production-grade mobile apps, SaaS products, and scalable backend systems. 🚀 My Playbook: I do not just build apps -> I build products designed to scale. 📱What I Build Flutter Apps – High-performance iOS & Android applications with clean architecture and real-time experiences. Backend and APIs – Laravel, Node.js, Firebase, Supabase, GraphQL, AWS, MySQL, MongoDB, and WebSockets. Startup MVPs – Launch market-ready products in weeks with a scalable foundation. SaaS, ERP and CRM Platforms – Multi-tenant systems, subscriptions, RBAC, admin dashboards, and business automation. Long-Term Partnerships – Reliable communication, clean code, and seamless collaboration. 📈 Proven Results JNPC (Canada): Scalable architecture capable of handling 60 to 10,000 users, 1500% growth, 3x revenue growth Dhansikhi: 21,000+ daily active users | 75K+ community Omni E-commerce: Production rescue & launch in 45 days The Digital Singhs Inc. (Toronto): Trusted technical backbone after 3 failed vendors FitMafia, Novagems, Kazo, DAAWAT, Yashica Produce and CybernetShield: Built and scaled platforms used by real businesses. 🛠️ The technical skills I bring to the table: Mobile: Flutter, Dart, BLoC, Riverpod, GetX Backend: Laravel, Node.js, Express.js, Firebase, Supabase, GraphQL, REST APIs, WebSockets Web: React.js, Next.js Database: MySQL, MongoDB Cloud and DevOps: AWS (EC2, S3, Lambda), Docker, CI/CD, Git Architecture and Integrations: Three tier clean architecture, Multi-Tenant SaaS, RBAC, Payment Gateways, Blockchain Integration 📩 Let's Talk If you are serious about building something that works for long term, execute by right team hit "Invite Now." Let us talk. #Flutter #Developer #FlutterDeveloper #FlutterFlow #App #Mobile #MobileAppDevelopment #SaaS #Development #AI #OpenAI #ChatGPT #Laravel #NodeJS #Firebase #AWS #GraphQL #MVPDevelopment #ERP #CRM #API #Integration #Backend #RiverPod #Docker #BlockChain

I provide the technical leadership and scalable architecture that growing businesses need. As a CTO and Software Architect, I specialize in transforming complex business requirements into high-performance AI automations and robust enterprise applications. As the Founder and CTO of Mangocoders, I bridge the gap between business vision and technical execution. Whether you are a startup building an MVP or an established enterprise scaling a SaaS platform, I offer the strategic oversight and high-end engineering required for long-term success. Core Areas of Expertise: Technical Architecture & CTO Strategy: Designing secure, modular, and future-proof systems using Laravel, Node.js, and Python. I help founders make critical infrastructure decisions that prevent technical debt and optimize for scale. AI Integration & Automation: Architecting intelligent workflows that leverage LLMs and custom AI agents to reduce operational costs and create unique product value. Enterprise Web Development: Expert-level delivery of complex systems, including custom CRMs, ERPs, and high-stakes SaaS platforms using Vue.js, React, and robust PHP backends. Cloud & DevOps Engineering: Professional-grade deployment on AWS, DigitalOcean, and Linux environments, ensuring 99.9% uptime with automated CI/CD pipelines. Why Founders & Enterprise Teams Partner With Me: 15+ Years of Architecture Experience: I’ve overseen the entire software development lifecycle for hundreds of projects, identifying and resolving bottlenecks before they impact your timeline. Business-First Philosophy: I don't just write code; I build digital assets designed to increase your company's valuation and operational efficiency. Top Rated Plus Status: I maintain a consistent record of 5-star delivery on high-budget, complex projects for clients worldwide. Clear, Strategic Communication: I translate technical complexity into clear business insights, ensuring all stakeholders are aligned. Let’s connect if you are looking for more than just a developer—let's build a secure, scalable, and future-proof product together.

I build SaaS platforms, AI-powered products, and mobile apps — from first wireframe to production deployment. 300+ projects delivered across 15+ countries. Whether you need a senior developer for a focused build or a full end-to-end delivery with design, development, and QA — I scale to what your project actually needs. My strongest work happens at the intersection of product thinking and technical execution. I don't just write code — I start with documented requirements, define acceptance criteria and edge cases upfront, and deliver against specs you've signed off on. Fewer surprises, fewer "that's not what I meant" moments, and software that works the way you expected. 𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱: 𝗦𝗮𝗮𝗦 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀 — Multi-tenant subscription products with real billing complexity: free trials, upgrades with mid-cycle proration, downgrades, failed payment dunning, usage-based plan limits, role-based access control, and admin dashboards with analytics, bulk operations, and data export. React/Next.js, Node.js or Laravel, PostgreSQL or MongoDB, Stripe or Razorpay. 𝗔𝗜-𝗣𝗼𝘄𝗲𝗿𝗲𝗱 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝘀 — This is where I do my most differentiated work. RAG systems where AI answers questions from your specific documents (contracts, policies, catalogs) with source citations and confidence thresholds. LLM-powered chatbots and automation agents using OpenAI, Claude, or Gemini. OCR and document intelligence for invoices, IDs, and forms. For data-sensitive projects, I deploy self-hosted models (LLaMA, Mistral) on RunPod so your data never leaves your environment. Python/Django orchestration, LangChain, Pinecone/Weaviate/pgvector. 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽𝘀 — Cross-platform iOS + Android with React Native. I handle what most developers miss: offline behavior, push notification flows, platform differences between iOS and Android, deep linking, device permissions, Apple Sign-In compliance, and App Store/Play Store submission. 𝗘-𝗖𝗼𝗺𝗺𝗲𝗿𝗰𝗲 & 𝗠𝗮𝗿𝗸𝗲𝘁𝗽𝗹𝗮𝗰𝗲𝘀 — Full commerce builds with payment gateway integration (including webhook handling and idempotent processing), order state machines, inventory, shipping integration, and separate seller/buyer dashboards for marketplaces. 𝗔𝗣𝗜 𝗕𝗮𝗰𝗸𝗲𝗻𝗱𝘀 & 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 — Backend services consumed by your existing frontend, third-party system integrations, real-time features via WebSocket, and data-heavy dashboards with complex filtering and reporting. 𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸: Every project starts with documented feature specs — screens, user actions, success states, error states, edge cases — with acceptance criteria so "done" is never ambiguous. Designs are reviewed against requirements before development begins. During the build, you get proactive updates. If something is outside scope, I flag it before building it. Before delivery, everything is tested against signed specs and you get a staging walkthrough to verify. 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸: Frontend: React, Next.js, Vue.js, React Native, Tailwind CSS Backend: Node.js, Laravel, Python/Django AI/ML: LangChain, OpenAI, Claude, Gemini, Pinecone, Weaviate, pgvector, RunPod Databases: PostgreSQL, MySQL, MongoDB, Firebase, Redis, Supabase Cloud: AWS, GCP, DigitalOcean, Vercel, Docker Integrations: Stripe, Razorpay, Twilio, SendGrid, Google Maps, Cloudinary, Shiprocket 𝗥𝗲𝗰𝗲𝗻𝘁 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀: → AI Travel Agent — RAG-powered conversational platform with document ingestion, vector search, and LLM-generated recommendations with citations. → P2P Fashion Rental Marketplace — React + Node.js + Stripe marketplace with buyer/seller flows, payments, and review system. Client: "They immediately understood the vision and delivered everything on time." → SaaS Portal Redesign — Full UI/UX redesign and rebuild. Client: "Strong understanding of SaaS UI/UX requirements, responsive and professional." → OpenWebUI Customization — Python-based AI interface customization. Client: "Absolutely on their game. Completed 100% to my satisfaction, super fast." Message me with your project brief — I respond within 2 hours with an honest assessment of fit, timeline, and approach. If it's not the right fit, I'll tell you that too.

I’m a Full-Stack & AI Developer with 7+ years of experience building scalable web apps and intelligent systems. I specialize in AI integration, automation, and custom product development using React, Next.js, Node.js, Laravel, Django, and Python. I help startups and businesses bring AI-driven features into their platforms — chatbots, data automation, predictive analytics, and personalized dashboards that create real business impact. My focus is on building applications that are: AI-ready — integrating OpenAI, LangChain, TensorFlow, and NLP models Scalable — built with modern stacks (MERN, LAMP, serverless, microservices) Efficient — clean code, reusable components, and cloud-optimized deployments Recent work includes: AI-based CRM system with automated lead summaries Smart LMS platform using NLP-driven recommendations Finance dashboard with predictive data visualization SaaS automation tools for workflow and reporting If you’re looking for a developer who understands both AI and product thinking, let’s talk. I combine strong engineering fundamentals with practical AI implementation — building systems that learn, adapt, and grow with your business.