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I build enterprise-grade applications in Golang and Python. Having developed systems at JP Morgan, Nestlé, and Home Depot, I focus on clean architecture, secure API design, and writing maintainable code for long-term growth. I am a hands-on developer who jumps into complex codebases to deliver stable, production-ready features for high-traffic environments.

I’m 𝙃𝙤𝙨𝙨𝙖𝙞𝙣 𝙍, a professional 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 specializing in 𝗙𝗹𝘂𝘁𝘁𝗲𝗿, 𝗙𝗹𝘂𝘁𝘁𝗲𝗿𝗙𝗹𝗼𝘄 and 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗳𝗼𝗿 𝗶𝗢𝗦 𝗮𝗻𝗱 𝗔𝗻𝗱𝗿𝗼𝗶𝗱. I help startups, businesses, and growing companies transform their ideas into reliable, scalable, and high performing 𝗺𝗼𝗯𝗶𝗹𝗲 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀 that deliver a seamless user experience. With 𝟱+ 𝘆𝗲𝗮𝗿𝘀 of hands on experience, I provide end to end mobile app development, covering UI implementation, application architecture, backend and API integration, third party services, performance optimization, testing, and App Store and Google Play deployment. I take a practical, business focused approach to development, building clean and maintainable solutions that are optimized for performance, scalability, security, and long term growth. Whether you need a brand new application, feature enhancements, bug fixing, performance optimization, or backend integration, I can deliver reliable, production ready mobile solutions. 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 I provide complete Mobile App Development services, including: ✔ Flutter App Development ✔ FlutterFlow App Development ✔ React Native App Development ✔ Cross Platform Mobile App Development ✔ Native Android App Development ✔ Native iOS App Development ✔ MVP Development for Startups ✔ Mobile App UI Implementation ✔ REST API Integration ✔ Third Party API Integration ✔ Firebase Integration ✔ Real Time Chat Applications ✔ Push Notifications ✔ Google Maps Integration ✔ Payment Gateway Integration ✔ App Performance Optimization ✔ App Security & Data Protection ✔ App Store Deployment ✔ Google Play Store Deployment ✔ App Maintenance & Continuous Support 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜 𝗛𝗮𝘃𝗲 𝗪𝗼𝗿𝗸𝗲𝗱 𝗪𝗶𝘁𝗵 I have successfully developed mobile applications for multiple industries, including: • Healthcare & Telemedicine • Fitness & Sports • E Commerce & Marketplace • Food Delivery • Taxi Booking & Ride Sharing • Real Estate • FinTech & Digital Payments • Education & E Learning • Logistics & Fleet Management • Travel & Hospitality • Social Networking • Video Streaming • Audio Streaming • Booking & Reservation Systems • Event Management • On Demand Service Platforms 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸𝘀 Mobile Development Flutter FlutterFlow React Native Dart JavaScript TypeScript Python Django FastAPI Node.js Express.js Firebase Supabase REST APIs GraphQL WebSockets OAuth Databases Firebase Firestore Realtime Database PostgreSQL MySQL MongoDB SQLite Cloud & DevOps Firebase Cloud Messaging (FCM) Firebase Authentication AWS Google Cloud Platform (GCP) Docker Git GitHub GitLab CI/CD Pipelines Cloud Run 𝗣𝗮𝘆𝗺𝗲𝗻𝘁 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 Stripe PayPal Apple Pay Google Pay In App Purchases Subscriptions 𝗧𝗵𝗶𝗿𝗱 𝗣𝗮𝗿𝘁𝘆 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 Google Maps Twilio WebRTC Zoom SDK OpenAI API ChatGPT API 𝗠𝗼𝗯𝗶𝗹𝗲 𝗙𝗲𝗮𝘁𝘂𝗿𝗲𝘀 Real Time Chat Push Notifications Location Tracking GPS Navigation QR Code Scanner Barcode Scanner 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗰𝗲𝘀𝘀 1. Discovery & Planning Understanding your business goals Project architecture planning Scalable mobile application strategy Feature roadmap Technology selection 2. Design & Development Clean and maintainable code Reusable architecture Responsive UI Backend integration API development Performance optimization Testing and debugging 3. Launch & Growth App Store Submission Google Play Store Publishing Performance Monitoring Analytics Setup Bug Fixes Long Term Maintenance Feature Enhancements Continuous Support 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲 ✅ 5+ Years of Mobile App Development Experience ✅ 100+ Mobile Applications Delivered ✅ Startup Friendly Development Approach ✅ Clean, Scalable & Maintainable Code ✅ Fast Communication ✅ On Time Delivery ✅ Full Cycle Mobile App Development ✅ Long Term Technical Support ✅ Business Focused Solutions ✅ Production Ready Applications Keywords Flutter Developer Flutter App Developer FlutterFlow Developer React Native Developer Mobile App Developer Cross Platform App Developer Android App Developer iOS App Developer Flutter Mobile App Development React Native Mobile App Development FlutterFlow Mobile App Development MVP App Development Firebase Developer API Integration Mobile UI Development Backend Integration Python Developer Django Developer FastAPI Developer Node.js Developer REST API Developer Mobile Application Development Cross Platform Mobile Apps Hybrid App Development App Store Deployment Google Play Deployment Startup App Developer Ready to Build Your Mobile App? If you're looking for a reliable Mobile App Developer, Flutter Developer, FlutterFlow Developer, or React Native Developer who can transform your idea into a scalable, high performance mobile application, you're in the right place. Let's build a secure, modern, and production ready mobile app that delivers exceptional user experiences and helps your business grow.

Top Rated Plus Flutter dev. 20+ apps shipped, 100% Job Success, recent contracts up to $40K. I build MVPs, rescue stalled apps, and set up subscriptions that actually convert. Most of my work goes beyond basic UI: RevenueCat and Stripe subscriptions, Firebase or Supabase backends, BLE hardware, maps, push notifications, and App Store / Play Store releases. I've taken apps from napkin sketch to launch, and I've stepped into half-built codebases and shipped them. I'm usually the right fit when a project needs someone who can understand the product, sort through the moving pieces, and make steady progress without every detail spelled out. What I can help with: - Building MVPs from idea to launch - Fixing, taking over, or cleaning up existing Flutter apps - RevenueCat, Stripe, and in-app purchase setup - Firebase, Supabase, PostgreSQL, auth, storage, and realtime features - BLE / Bluetooth hardware integrations - Maps, GPS, and location tracking (Mapbox, Google Maps) - Push notifications, analytics, AI integrations, and store deployment - Release planning, QA support, and technical direction Tech I use regularly: Flutter, Dart, Firebase, Supabase, PostgreSQL, REST APIs, RevenueCat, Stripe, Mapbox, Google Maps, BLE, OpenAI, BLoC, GoRouter, iOS, Android What clients have said: "Christian is an extremely engaged, proactive and capable engineer. I recommend working with Christian if you get the opportunity!" "Christian had no problem hitting the ground running with an existing team on an app that was partially built, and delivered immediate value. Fast turnaround, creative solutions." "He was able to quickly assist our urgent requests and provided valuable input. I highly recommend Christian." If you're building, fixing, or trying to finally ship your app, send me a message and I'll help you figure out the cleanest path forward.

Hi, I can elevate your business's web and mobile presence and build your website or mobile application from scratch or fix your existing one. ✅ Senior Laravel ,WordPress/Woocommerce and Shopify Developer. ✅ Senior Flutter Developer for mobile apps. ✅ Over 10 years of Laravel, WordPress/Woo, and PHP development experience. ✅ Upwork's TOP RATED PLUS web and mobile developer. ✅ With more than 10 years of commercial development, I can estimate all tasks and projects, so you'll know the price and turnaround. Here is what I can help you with for the back-end and front-end tasks: • Laravel development • Flutter development and submission to AppleStore and GooglePlay. • WordPress and WooCommerce and custom plugin development. All popular themes and ACF. • PHP/MySQL/MangoDB development • FrontEnd development; React.js, TypeScript, html5, CSS and more I can set or fix your server configuration : • Amazon AWS, Digital Ocean, Vultr, Liquid, WPEngine, Plesk • All popular U.S. and European shared hostings; Godaddy, Ionos, Bluehost, Kinsta, and much more. I can add payment functionality to your website or the mobile app: • Invoicing, Checkout for users and guests, Recurring payments, etc. • Custom discounts, promo codes, and referral programs. • Authorize.net, Stripe, Square, PayPal, Apple pay and Amazon pay. I will set up your email configuration for Google, Amazon, Office365/Outlook, as well as campaigns with Sendgrid, Twilio, Mailchimp, Constantcontact etc. Management: Jira, Asana, Trello, or Slack. If you are looking for a result-oriented professional who cares about delivering high-quality work, please feel free to contact me.

I build complete products 𝗺𝗼𝗯𝗶𝗹𝗲 𝗮𝗽𝗽𝘀, 𝘄𝗲𝗯 𝗽𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀, and 𝗨𝗜/𝗨𝗫 𝗱𝗲𝘀𝗶𝗴𝗻𝘀 as your 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, from Figma to App Store to live deployment. Shipped 𝗔𝗹-𝗙𝗮𝗹𝗮𝗵 to 𝟱𝟬,𝟬𝟬𝟬+ iOS users. Built 𝗖𝗮𝗻𝘇𝗲𝘆 serving 𝟭,𝟬𝟬𝟬+ daily active users. One 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, full ownership. I'm a 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 working across React Native, Flutter, React & Node.js, with 10+ years shipping mobile and web apps at scale. As a 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, design to App Store, I own it all. Clients work with one 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, not a team of five. 𝗪𝗛𝗔𝗧 𝗜 𝗕𝗨𝗜𝗟𝗗 𝗔𝗦 𝗔 𝗙𝗨𝗟𝗟 𝗦𝗧𝗔𝗖𝗞 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗘𝗥: Mobile Apps built end-to-end as your 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 - React Native & Flutter for iOS + Android (single codebase) - Native iOS in Swift/SwiftUI when required - Firebase backend, push notifications, offline support - In-app purchases, AdMob, App Store & Play Store deployment Web & Backend built end-to-end as your 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 - React/Next.js frontends with responsive design - Node.js/Express backends with REST APIs - PostgreSQL & MongoDB databases - Stripe payment integration - Real-time features (WebSockets, live updates) UI/UX & Design - Figma UI/UX design for mobile and web - Design systems, components, and auto-layout - Wireframes, prototypes, and developer-ready handoff - Dark/light themes, responsive layouts, brand-consistent UI 𝗦𝗣𝗘𝗖𝗜𝗔𝗟𝗜𝗭𝗘𝗗 𝗜𝗡 𝗔𝗦 𝗔 𝗙𝗨𝗟𝗟 𝗦𝗧𝗔𝗖𝗞 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗘𝗥: ✓ On-demand apps (delivery, booking, ride-hailing) ✓ FinTech & payment integration (Stripe, Apple Pay, in-app purchases) ✓ 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 for SaaS platforms & admin dashboards ✓ 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 for e-commerce & marketplace platforms 𝗧𝗘𝗖𝗛 𝗦𝗧𝗔𝗖𝗞 (𝗙𝗨𝗟𝗟 𝗦𝗧𝗔𝗖𝗞 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗘𝗥): Mobile: Flutter, Dart, Swift, SwiftUI, Kotlin, React Native Frontend: React, Next.js, TypeScript, Tailwind CSS Backend: Node.js, Express, GraphQL, REST APIs Database: PostgreSQL, MongoDB, Firebase Firestore, Spabase Payments: Stripe, PayPal, RevenueCat, Apple Pay, Google Pay Design: Figma, UI/UX, Wireframing, Prototyping DevOps: AWS, Vercel, Docker, CI/CD, GitHub Actions 𝗠𝗬 𝗣𝗥𝗢𝗖𝗘𝗦𝗦 𝗔𝗦 𝗬𝗢𝗨𝗥 𝗙𝗨𝗟𝗟 𝗦𝗧𝗔𝗖𝗞 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗘𝗥: 1. Requirements analysis & technical planning 2. Figma design implementation 3. Agile development with weekly progress updates 4. Testing on staging environment 5. Production deployment & post-launch support Based in 𝗡𝗲𝘄 𝗬𝗼𝗿𝗸, 𝗨𝗦𝗔 (𝗘𝗦𝗧) available during 𝗨𝗦 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗵𝗼𝘂𝗿𝘀. One 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿, always in your corner. Whether it's a new build or a fix, I'm the 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 who takes it start to finish. Response time: 𝟮–𝟰 𝗵𝗼𝘂𝗿𝘀. Message me with your project details. Full Stack Developer | Flutter Full Stack Developer | Full Stack Flutter Developer | React Full Stack Developer | Full Stack React Developer | Node.js Full Stack Developer | Full Stack Node.js Developer | Mobile Full Stack Developer | Full Stack Mobile App Developer | Web Full Stack Developer | Full Stack Web Developer | SaaS Full Stack Developer | Full Stack SaaS Developer | eCommerce Full Stack Developer | Full Stack eCommerce Developer | Next.js Full Stack Developer | Full Stack Next.js Developer | API Full Stack Developer | Full Stack API Developer | Backend Full Stack Developer | Full Stack Backend Developer| React Native Developer

I'm a UI UX Designer with 8+ years of experience in UI/UX Design. My clients include Microsoft, Yahoo, Stanford University, Henkel, and DoorDash. I specialize in UX & UI, Web Design, SaaS Design, Mobile App Design, and Graphic Design, using Figma, Adobe Photoshop, and Adobe Illustrator as primary tools. 160+ UI/UX Design projects delivering User Interface Design, User Experience Design across ecommerce, fintech, healthcare, and SaaS. What Makes My Approach Different I start with UX Research and data, not pixels. Every UI UX Designer Figma project begins with User Flow analysis and competitive benchmarking. I am a product designer who translates goals into measurable outcomes. I am a mobile UI UX designer who validates every prototype through usability benchmarks. I am a UI UX web designer creating responsive design systems developers trust. As a UI UX Designer SaaS expert, I have delivered 20+ B2B SaaS platforms, Web Design, and enterprise products. My Deliverables UI UX Designer Figma - 4,500+ User flows, wireframe deliverables, Wireframing screens, high-fidelity prototypes, UI/UX Prototyping, and hundreds of design systems in Figma. Clean modern component libraries with color palette standards, typography systems, interaction patterns, and UI Graphics. UI UX Designer Figma output is production-ready. Mobile UI UX Designer - 35+ Mobile App Design projects for iOS and Android. Mobile UI Design, User Flow mapping, responsive navigation, prototype testing, Usability Testing, and GUI Design. Each mobile UI UX designer delivery includes interaction specs. Mobile App Redesign and App Design for smartphone and desktop application environments. UI UX Web Designer - 55+ Landing Page design projects, SaaS landing page design, Web Design for marketing sites and Web Application platforms. UI UX web designer deliverables include responsive design, Webflow layouts, conversion strategy. Attention to detail as a website designer. UI UX Designer SaaS - 30+ Dashboard design projects, admin panels, B2B SaaS interfaces. SaaS design that cuts cognitive load. UI UX Designer SaaS process covers Information Architecture, User Flows, Data Visualization, and Usability Testing. UI UX Designer React - 25+ token-mapped design systems for React handoff. UI UX Designer React output bridges UIUX design and engineering with component specs. HTML, CSS, JavaScript for design-development alignment. HTML5, CSS 3, PHP for WordPress integration. Node.js, Swift for iOS Development and Mobile App Development. Flutter and Android App Development specs provided. Brand Identity and Graphic Designer - 120+ Logo Design projects, visual identity, Branding, color palette, typography, brand guidelines. A graphic designer with 45+ identities across web, Mobile App Design, print. Illustrator for Illustration and vectors. Photoshop for visuals. Label and Packaging Design. Ecommerce and Niche - 12+ UX designer Shopify storefronts for conversion. Game UI UX designer interfaces. UI UX designer crypto dashboards. UI UX designer healthcare portals with accessibility compliance. WordPress and Webflow builds. How I Work Step one: UX Research. I audit your product, study users, analyze competitors. I define User Flows and map Information Architecture. Step two: wireframe exploration, Wireframing, and interactive prototypes in Figma. Full UI/UX Prototyping and UX/UI design. Step three: Web Design execution. Clean modern User Interface Design, design system, color palette, typography. Step four: responsive design handoff for React, Webflow, or WordPress. Usability Testing throughout. The methodology I used at Microsoft and DoorDash. Every mobile UI UX designer, UI UX web designer, and UI UX Designer Figma project follows this. Proven Outcomes A B2B SaaS healthtech company: I redesigned dashboard design and SaaS landing page design. User Experience improved with activation rates rising 58%. The design system contained 310+ components. UI UX Designer React handoff cut engineering time by 35%. Landing Page conversion jumped 41%. User Experience Design guided every decision. An ecommerce wellness brand needed a complete overhaul. UI UX designer healthcare work met accessibility standards. User Flows cut task completion by 42%. Brand identity, visual identity, brand guidelines unified Mobile App Design, Web Design, and print. Ecommerce conversion grew 52%. Every interaction validated through testing. Get Started Share your project, users, goals. I reply within 2 hours. As a UI UX Designer, I bring UI UX Designer Figma expertise, mobile UI UX designer skills, UI UX web designer precision, UI UX Designer SaaS architecture, and UI UX Designer React specialization. A product designer, graphic designer, web designer focused on User Experience strategies grounded in research. The standard I delivered for Microsoft, DoorDash, and Stanford. Message me.