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WHO I AM 7+ years of production mobile development. 5x world record holder in tech, including a Guinness World Record. 2025 Misk Global Tech Award winner. Senior Software Engineer at Microsoft on the Teams platform 300 million daily users by day. Most mobile apps fail not because of bad ideas, but bad engineering. I build iOS and Android apps that are fast, maintainable, and built to scale whether you're launching your first MVP or fixing what a previous team left behind. THE PROBLEM I SOLVE I ship products that scale. You are not hiring a coder, you are hiring someone who will take ownership, deliver on time, and leave you with code your team can actually maintain. I have built healthcare systems for hospitals, enterprise apps at Microsoft used by 300 million daily users, and production apps that handle real payment flows and real data. I know what it takes to ship software that does not break when it matters. That is the difference between a freelancer and a partner. I am the latter. SELECTED WORK ORRCA, live healthcare platform across 4 Vancouver hospitals. Manages patient records, clinical workflows, and real-time data sync with HIPAA compliance. Built with React Native and a secure Supabase backend. Kinetix, iOS and Android physiotherapy app for ACL injury rehabilitation. HealthKit integration, video-guided exercises, offline functionality, and progress tracking. Built with Flutter. PawMatch, pet services marketplace connecting sitters with pet owners. Swipe-based matching, real-time messaging, Stripe payment processing. Flutter and marketplace architecture at scale. Beauty Appointment App, progressive web app for beauty appointment booking. Cross-platform mobile and web, optimized for conversion. FlutterFlow with real-time backend sync. Microsoft Teams, enterprise mobile app, 300 million daily users. WHAT I BUILD React Native and Flutter apps for iOS and Android Cross-platform mobile app development and MVP delivery Gamification systems — XP engines, streaks, quests, leaderboards BLE hardware and IoT device integrations Stripe Connect with marketplace payments, subscriptions and split payouts Supabase and Firebase backends with row-level security AI and ChatGPT feature integrations HealthKit and Health Connect integrations Full App Store and Google Play submission and compliance Admin dashboards and web applications Node.js backend and REST API development TECH STACK Mobile: React Native, Flutter, Expo, iOS, Android Backend: Supabase, Firebase, Node.js, REST API, AWS Payments: Stripe Connect, in-app purchases, subscriptions AI: OpenAI, ChatGPT integration, AI-powered mobile apps Health: HealthKit, Health Connect, BLE devices INDUSTRIES I HAVE BUILT FOR Healthcare and medical platforms Enterprise software and SaaS Consumer health and wearables Fintech and payments Marketplace and two-sided platforms Community and social platforms Fitness and wellness apps Education and e-learning WHY I AM DIFFERENT Ownership Mentality. I do not just write code, I care about your success. Your problem becomes my problem. I will not ship something unless I would be comfortable using it myself. Clarity and Predictability. NDA before sensitive discussion. Scope and milestones locked before any code. Weekly check-ins. GitHub and Supabase access on Day 1. You own everything from the start. No surprises. Selective Not Desperate. I turn down projects that are not the right fit. This means you get my full focus, not a divided contractor juggling 20 clients. Enterprise Standards at Freelance Speed. Microsoft-quality code. Clean architecture. Security baked in. Performance optimized from Day 1. WHO I WORK BEST WITH Funded startups, growing companies, and enterprises who need a senior mobile app developer, not a code monkey. If you have a spec, a timeline, and a real budget, we will work well together. HOW WE WORK TOGETHER Step 1. Message me with your scope. I will respond within 24 hours and tell you if I am the right fit. Step 2. Alignment call. We discuss your product, timeline, and expectations. No surprises. Step 3. Scope locked. Milestones, deliverables, and timeline in writing before any code. Step 4. Day 1 ownership. GitHub, Supabase, and all credentials transferred to you. You own the code from the start. Step 5. Weekly check-ins. Video sync to keep you updated. No ghosting, no excuses. If your project is serious, message me with your scope. I will tell you within 24 hours if I am the right fit. If I say yes, you have my full commitment. Best Rayyan Siddiqui

Kai Poynting has over 15 years of cumulative experience in the technical writing field, 9 years as a freelance technical writer, 2 years as the senior technical writer for one of the larger energy software companies in Calgary Alberta, and 5 years of experience writing about solutions for IT. In addition to writing about solutions for IT, those 5 years were also spent testing, building and deploying some of the same solutions. As part of a small group of consultants, Kai was provided with a great many opportunities to obtain hands on experience in installing, configuring, building, and managing various server solutions, including Server 2008 R2, Exchange 2007 and 2010, Hyper-V, SCVMM, and more. He also provided customer support and technical support for the company's classroom environment, including requirements management, tech support, deployment, and server configuration (Exchange 2007 MOC courseware setup, for example). At Upwork, Kai has a 100% success rate, and has maintained a status of top rated plus for over 9 years. His clients have included mobile app developers, encrypted communication specialists, and cloud storage and orchestration vendors. He has written numerous user guides, manuals, RFPs and more, as well as created how-to videos showcasing product functionality. This is not to mention numerous blog articles, either ghost-written (for busy company founders), or in his own name. Kai is a flexible, project-oriented professional with a well-rounded skillset. He also holds a BA with an English major, and writes creatively whenever he can. Communication is the cornerstone of his profession and he prides himself on being able to provide the clearest possible message in all documents he provides.

Hi, I am Bushra Ahsan ! I am senior Mobile App Developer. My company Rozana Tech Inc, has been one of Surrey's leading app development agencies since 2019. After delivering numerous successful projects, we launched our agency on Upwork in November 2023. ⚡️My Agency Since Sep 2019, My talented team of over 15+ members and I have been innovating. We've successfully delivered over 50+ apps across various platforms in the last 2 year alone, making a real difference for our clients. ⚡️Our Expertise ✅Mobile App Development: Android, iOS, & Cross-Platform App Development using Java, Kotlin, Swift, Objective C, React Native, Flutter, and more. ✅Website and Full Stack Development: Crafting seamless back-end experiences with React.js, Angular.js, Node.js, MongoDB, Laravel, etc. ✅Logo & UI/UX Design: Bringing your ideas to life with Adobe XD, Photoshop, Sketch, Figma, etc. ✅ SEO & Digital Marketing: Optimizing your online presence for success. ✅ Intellectual Property Services: Assisting with trademark and copyright matters, and creation of LLCs. ✅ End-to-End Solutions: From logo design, UI/UX development, workflow setup, testing to deployment in app stores, we've got it all covered. Why Choose Rozana Tech inc ? ✪ Customized Approach: We tailor our services to fit your needs and budget. ✪ Agile Workflow: Regular updates, milestones, or scrum sprints keep you in the loop. ✪ Quality Assurance: Our meticulous testing process ensures that every project we undertake meets the highest standards of quality and functionality. ✪ Competitive Price Assurance: We provide top-quality services at competitive prices to offer you the best value for your investment. ✪ Guaranteed Success: We work tirelessly to exceed your expectations. 💬 𝗟𝗲𝘁’𝘀 𝘁𝗮𝗹𝗸 𝗮𝗽𝗽 𝗶𝗱𝗲𝗮𝘀 Talk directly to me, Bushra, No middlemen or salespeople. 🛡️ Industry-leading guarantee: unlimited design revisions, or your money back I'm dedicated to delivering tailored solutions promptly. Feel free to reach out with your questions, and I'll reply within 24 hours. Bushra A.

Looking for a Recruiter who delivers — not just resumes, but the right people, fast? You've found her. I'm Preethi, an HR and Talent Acquisition professional with 8+ years of experience helping businesses across the U.S. and Canada build high-performing teams. With an MBA in Human Resources, a Diploma in HR Management, and SAP-HR certification, I bring both the strategy and the execution to every engagement. WHAT I DO BEST • Full-cycle recruitment: from sourcing and screening to offer negotiation and onboarding • Managing 10–15 open requisitions simultaneously without sacrificing quality • LinkedIn sourcing and multi-channel talent pipeline building • Partnering with hiring managers to define requirements, set expectations, and close faster • Onboarding coordination and new hire integration support • HR operations, documentation, and compliance support TECHNICAL ROLES I FILL DevOps Engineers · Full Stack Developers (PHP, .NET, Java) · Software Engineers · Solutions Architects · UI/UX Designers · Mobile App Developers · Business Analysts NON-TECHNICAL ROLES I FILL HR Managers · Sales Managers · Business Development Managers · Customer Support Representatives · Operations Staff MY TRACK RECORD • 17 completed Upwork jobs with a 5.0 rating • Consistently described by clients as Committed to Quality, Collaborative, Reliable, and Detail-Oriented • Successfully placed technical talent for startups, scale-ups, and established enterprises MY APPROACH I treat every search like it's my own hire. That means transparency, speed, and quality — always. I don't just find candidates; I find the right candidates and make sure they're set up for success from day one. Ready to build your dream team? Let's talk.

🥇 𝐓𝐨𝐩 𝟏% 𝐓𝐚𝐥𝐞𝐧𝐭 - 𝐄𝐱𝐩𝐞𝐫𝐭 𝐕𝐞𝐭𝐭𝐞𝐝 on Upwork. I help startups and product teams build fast, clean, and scalable mobile apps. 👨‍💻 As a senior full stack developer with over 15 years of experience, I build apps that help startups and businesses grow. 🔧 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐨 - Mobile Apps (iOS + Android): 40+ apps delivered. 25+ published to the App Store (⭐ 4.7 avg). Performance optimized, CI/CD deployed, built to scale. - IoT & BLE: Deep expertise with ESP32, custom firmware, Bluetooth, and AWS IoT. Smart devices, real-time sync, low-latency control. - AI/ML Integration: ChatGPT, ML models, and automation embedded into mobile/web apps. 5+ AI chatbots, 4 ML features built. - Web Backend + Frontend: Full-stack engineer using Node.js, React, Laravel, MySQL. Solid APIs, fast UIs, maintainable code. 📱 𝐑𝐞𝐜𝐞𝐧𝐭 𝐖𝐨𝐫𝐤 - BLE-based TV Lift Controller: IoT app + firmware. 99.9% uptime. Reduced support tickets by 85%. - Fitness Social Platform (Flutter): Scaled to 50K+ users. 40% MoM growth. - QSR Ops Platform: Internal tool for 200+ fast food locations (Taco Bell, KFC, etc). Saved $1.2M/yr in ops cost. - Sports Team App: Booking, scheduling, payments. Now used by 15K+ hockey players. 🧰 𝐒𝐭𝐚𝐜𝐤 Mobile: Flutter, Dart, React Native, Swift Web: React.js, Node.js, Laravel IoT: BLE, ESP32, Arduino, AWS IoT AI: Python, OpenAI API, TensorFlow DevOps: CI/CD, GitHub Actions, Docker Tools: Figma, Postman, Firebase, MySQL ✅ 𝐖𝐡𝐲 𝐌𝐞? - Built MVPs and scaled platforms — not just code, real products - Own the process — architecture to deployment - Communicate clearly - Proactive - Detail-oriented

Hi! I'm Ihor — a Senior Mobile App developer and Full-stack Architect with over 15 years of experience. I specialize in building high-performance systems for Android and iOS using a modern stack of Node, Kotlin, and Swift. I help startups and enterprises launch products that scale to millions of users, ensuring that every Mobile App developer on my team follows the highest industry standards. 🏆 PROVEN TRACK RECORD & EXPERTISE 🔹 Logistics & Tracking: Created complex delivery platforms where Node backends power real-time tracking for Android and iOS devices. As a Mobile App developer, I've achieved a 45% increase in operational efficiency by optimizing how Kotlin and Swift handle background location tasks. 🔹 AI & Data Analytics: Built dashboards serving 3M+ users. I ensured that the Mobile App developer tools for Android and iOS remained perfectly synchronized with the data layer, utilizing Kotlin and Swift for high-speed processing and Node for robust API management. 🔹 Real-time Systems: Expert in sub-second latency for chats and notifications. My experience as a Mobile App developer includes implementing native modules in Kotlin for Android and Swift for iOS, backed by scalable Node clusters. ⚡ COLLABORATIVE LEADERSHIP I thrive in leading engineering teams where I can act as both an architect and a lead Mobile App developer. I ensure that the Android and iOS frontends are perfectly aligned with the Node infrastructure. My deep knowledge allows me to audit code written in Kotlin or Swift to ensure 99.5% crash-free sessions. Whether you are launching a new product for Android and iOS or need a Mobile App developer to stabilize an existing codebase in Node, I deliver results. I focus on long-term quality, using Kotlin for stable system logic and Swift for premium user experiences. 🛠 TECH STACK: 🔹Mobile/Frontend: React Native, React, Angular, AngularJS, JavaScript, TypeScript, CSS, HTML. 🔹Backend/API: Node.js, Python, API Integration, SQL, MongoDB, Firebase. 🔹Infrastructure: Docker, AWS, GCP, CI/CD, Web Development tools. ⭐ If you need a Mobile App developer who masters Android, iOS, Node, Kotlin, and Swift to drive your business growth — let’s connect!