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Senior Mobile Engineer with 6+ years of experience building and shipping production mobile applications from concept to App Store release. I specialize in: • Native iOS (Swift, SwiftUI, UIKit) • Cross-platform mobile (React Native) • Backend/API integration • App Store deployment and maintenance • Performance optimization and architecture Proven track record delivering mobile products across fintech, B2B, and consumer industries. Experienced in both commercial software development and independently shipping multiple mobile applications to the App Store.

I’m Gaurav, a Full Stack AI/ML Engineer with 6+ years of experience building 𝐀𝐈-𝐝𝐫𝐢𝐯𝐞𝐧 𝐒𝐚𝐚𝐒 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬, 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐬𝐲𝐬𝐭𝐞𝐦𝐬, 𝐚𝐧𝐝 𝐢𝐧𝐭𝐞𝐥𝐥𝐢𝐠𝐞𝐧𝐭 𝐰𝐞𝐛 𝐚𝐧𝐝 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬. I specialize in combining modern full-stack development with 𝐦𝐚𝐜𝐡𝐢𝐧𝐞 𝐥𝐞𝐚𝐫𝐧𝐢𝐧𝐠, 𝐜𝐨𝐦𝐩𝐮𝐭𝐞𝐫 𝐯𝐢𝐬𝐢𝐨𝐧, 𝐚𝐧𝐝 𝐀𝐈 𝐚𝐠𝐞𝐧𝐭 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬 to deliver fast, secure, and scalable software for startups and enterprises. ✅ Core Skills - Frontend: React, Next.js, Vue, Svelte, TypeScript, Tailwind CSS - Backend: Node.js (Express, NestJS), Python (FastAPI, Django, Flask), Go, PHP (Laravel) - Mobile: React Native (iOS & Android), Cross-Platform Apps - Databases: PostgreSQL, MongoDB, MySQL, Firebase, Supabase Cloud & DevOps: AWS, GCP, Azure, Docker, Kubernetes ✅ AI, ML & Automation Expertise - Machine Learning: Scikit-learn, TensorFlow, PyTorch - Computer Vision: OpenCV, YOLO, MediaPipe, Vision Transformers, Object Detection, OCR - AI Agents & Chatbots: LangChain, CrewAI, LangGraph, OpenAI, LLaMA - Voice Agents: Retell.AI, ElevenLabs, VAPI, Twilio - Automation: Zapier, Make.com, n8n, Airtable, Notion, Google Workspace - LLM Integration: RAG systems, CustomGPTs, Knowledgebase Agents ✅Why Clients Choose Me - End-to-End Ownership: From architecture to deployment - Agile Delivery: Clear milestones and fast communication - Secure & Reliable: Tested, maintainable, and scalable code - Client-First Approach: I adapt to your stack, goals, and team Let’s build your next AI-powered solution together! 🚀 🔑 Keywords for Upwork Search Full Stack AI/ML Engineer, Python Developer, Node.js Developer, React Developer, Next.js Developer, React Native Developer, AI Agent Developer, AI Chatbot Developer, AI Voice Agent, Machine Learning Engineer, Computer Vision Engineer, LangChain Developer, CrewAI, Retell.AI, VAPI, ElevenLabs, OpenAI Developer, TensorFlow, PyTorch, FastAPI, Django, SaaS Developer, Automation Engineer, Workflow Automation, RAG Chatbot, API Integration, AWS, GCP, Docker, Kubernetes, Stripe API, DevOps, Cloud Engineer, Web Application Developer, Mobile App Developer, FinTech, AI SaaS, Intelligent Automation

Senior Software Engineer at Microsoft with 8+ years of experience building React Native and Flutter mobile apps. 5x world record holder in tech, including a Guinness World Record. 2025 Misk Global AI and Tech Award winner. On the Teams platform at Microsoft 300 million daily users. Most react and flutter mobile apps fail because of bad engineering, not bad ideas. I build React Native and Flutter apps for iOS and Android that are fast, maintainable, and built to scale and where it actually adds value, I integrate AI and automation into the product instead of bolting it on as a gimmick. AI automation and AI-powered mobile apps are core to what I do, along with most things coding. You're not hiring a coder. You're hiring someone who takes ownership, ships on time, and leaves your team with code they can actually maintain. I've built healthcare platforms live in hospitals, enterprise software at Microsoft used by 300 million people a day, and production apps handling real payments and real data. I know what it takes to ship something that doesn't break when it matters. That's the difference between a freelancer and a partner. I'm the latter. Some of what I've built: ORRCA — a live healthcare platform running across 4 Vancouver hospitals, managing patient records and clinical workflows with real-time sync and HIPAA compliance. React Native, Supabase backend. Kinetix — an iOS/Android physiotherapy app for ACL rehab, with HealthKit integration, video-guided exercises, and offline support. Built in Flutter. PawMatch — a pet-sitting marketplace with swipe-based matching, real-time messaging, and Stripe-powered payments at marketplace scale. Flutter. Beauty Appointment App — a cross-platform booking app built in FlutterFlow, optimized for conversion, with real-time backend sync. Microsoft Teams — enterprise mobile app, 300 million daily users. I work across React Native, Flutter, Supabase, Firebase, Node.js, and AWS, and I build AI-powered features using OpenAI and ChatGPT integrations when they genuinely improve the product. I've also shipped BLE/IoT integrations, Stripe Connect marketplace payments, HealthKit/Health Connect, and full App Store and Play Store submissions. I've worked across healthcare, fintech, marketplaces, fitness, and enterprise SaaS — different industries, same standard: clean architecture, security done right from day one, and performance that holds up under real usage. How I work: NDA before anything sensitive gets discussed. Scope and milestones locked in writing before any code gets written. GitHub and Supabase access handed to you on day one you own everything from the start. I turn down projects that aren't the right fit, so the ones I take get my full attention, not a slice of it split across twenty clients. If you've got a spec, a timeline, and a real budget message me with your scope. I'll tell you within 24 hours if I'm the right fit, and if I say yes, you have my full commitment. Best, Rayyan Siddiqui

I help founders turn ideas, AI-generated prototypes, and MVPs into secure, scalable products that are ready for real users. Over the years, I've built production-ready SaaS platforms, AI applications, mobile apps, CRMs, ERP systems, healthcare platforms, property management software, and consumer applications used by thousands of users. My focus is not just writing code. I help founders make the right technical decisions, improve architecture, ship faster, and build products that can grow without constant rewrites. What I work on: ➜ AI SaaS platforms ➜ React Native & Expo apps (iOS + Android) ➜ Next.js & React web applications ➜ Node.js APIs & backend architecture ➜ Supabase, PostgreSQL & MongoDB ➜ OpenAI, Claude, Gemini & AI integrations ➜ Stripe subscriptions & payment systems ➜ Authentication, RBAC & multi-tenant SaaS ➜ Lovable, Bolt.new, Replit, Base44 & AI-generated MVPs ➜ Production deployments, CI/CD & scaling AI Experience I build AI products using: ➜ OpenAI GPT ➜ Claude ➜ Gemini ➜ RAG & Vector Databases ➜ AI Memory ➜ Streaming Responses ➜ Prompt Engineering ➜ Tool Calling ➜ OCR & Document Processing ➜ AI Cost Optimization Selected Products ➜ FurCare AI AI-powered pet care platform with chat, image analysis, health tracking, subscriptions, and mobile apps. ➜ Pawpular Walk-to-earn social fitness platform with live step tracking, rewards, competitions, and React Native mobile apps. ➜ Field Operations Pro Enterprise ERP platform for field operations, task management, scheduling, reporting, and mobile workforce management. ➜ Vaistat Healthcare SaaS platform with patient management, appointments, telemedicine, medicine delivery, and admin dashboards. ➜ Gated Property management platform with resident portal, visitor management, payments, notifications, and role-based dashboards. How I work I move fast without compromising quality. AI tools like Claude Code, Cursor, Copilot, Lovable, Bolt, and Replit help accelerate development, but every feature is reviewed, tested, optimized, and production-ready before release. I believe in: ➜ Clean architecture ➜ Maintainable code ➜ Honest communication ➜ Weekly demos ➜ Long-term partnerships If you're building an AI SaaS, mobile app, internal platform, CRM, ERP, marketplace, or want to take an MVP to production, I'd be happy to discuss your project and recommend the most practical approach before writing a single line of code.

🚀 I help startups build high-performance React Native apps for iOS & Android — from MVP to scalable products. With 10+ years of experience and $200K+ earned on Upwork, I focus on building fast, reliable, and user-friendly mobile apps that grow with your business. 💡 What I can help you with: • Build MVP apps quickly and efficiently • Develop scalable React Native apps (iOS & Android) • Convert existing apps into mobile solutions • API integration (Node.js / Laravel backend) • App performance optimization & bug fixing • UI/UX implementation with smooth user experience 🛠 Tech Stack: React Native, Flutter, Laravel, Node.js, JavaScript, Swift, Kotlin 📈 Why clients choose me: • Clear communication & fast response • Reliable delivery (83+ completed jobs) • Focus on long-term partnerships • Clean, maintainable code Experience in Trello, JIRA, Asana, BitBuket, Springloops and BaseCamp for project management. If you're looking for a developer who understands both business and technology — let’s talk.

As a Senior Full-Stack and AI Engineer with 14+ years of experience, I specialize in designing and building scalable web applications, cloud platforms, AI-powered automation systems, and high-performance APIs. I have extensive experience developing enterprise SaaS platforms, CRM/ERP systems, fintech applications, and AI-driven automation solutions using modern technologies such as Python, Node.js, Golang, Java, .NET, Ruby on Rails, React.js, and Next.js. I also work extensively with AI and automation frameworks, building intelligent workflows and LLM-powered applications using tools like LangChain, LangGraph, HuggingFace models, and n8n automation pipelines. Core Technical Expertise AI & Automation LLM integrations (OpenAI, Claude, HuggingFace) LangChain & LangGraph AI workflows Automation pipelines using n8n AI-powered SaaS platforms and content automation systems AI chatbots and intelligent agents Backend Development Python (FastAPI, Flask, Django) Node.js (REST APIs & microservices) Golang microservices Java (Spring Boot) .NET / ASP.NET Core Ruby on Rails Frontend Development React.js and Next.js TypeScript and modern JavaScript frameworks Angular Responsive UI development using Tailwind and Bootstrap Mobile Development React Native cross-platform mobile applications Blockchain Development Solidity smart contracts Ethereum and Web3.js integrations NFT and decentralized applications Cloud & DevOps AWS, Azure, and Google Cloud Docker, CI/CD pipelines Scalable microservices architecture Why Clients Hire Me ✔ 14+ years of professional development experience ✔ Expertise across AI, cloud, full-stack, and blockchain technologies ✔ Proven track record building enterprise SaaS platforms and scalable systems ✔ Strong focus on clean architecture, performance, and maintainable code ✔ Clear communication and reliable project delivery If you are looking for a senior engineer who can build scalable applications, AI-powered solutions, or modern SaaS platforms, I would be happy to discuss your project. Let's connect and bring your idea to life. Thanks, Hitesh Kanwar