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I run an established e-commerce site and now need a companion mobile app that feels as smooth as the web store while adding the convenience of native shopping. The build has to ship on both iOS and Android from the same codebase (React Native, Flutter, or a comparable cross-platform framework is fine as long as performance remains high). Core experience • Shoppers open the app, browse every product already live on the website, add items to cart, and check out without leaving the app. • The interface must resize gracefully on phones and tablets, portrait or landscape. Swipes, lazy-loaded images, and search/filter functions should feel instant. Account & security Sign-up and log-in rely exclusively on phone number verification—no email or social accounts at this stage. Please factor in OTP handling, resend limits, and secure token storage. Payments During checkout the app needs to process Credit/Debit cards and PayPal natively. Use a PCI-compliant gateway (Stripe, Braintree, or another you already master) so I remain covered on compliance. Leave hooks for additional digital wallets later, but they are out of scope for this release. Admin side Products, pricing, inventory, and order statuses already live in my website’s database. The app should pull and push through the existing REST/GraphQL endpoints; if a connector layer is required, note it in your plan. Deliverables • Production-ready iOS & Android apps, approved in both stores • Source code with clear README for future maintenance • Brief hand-off session (recorded) walking through build, deployment, and environment variables Acceptance criteria 1. User can register/login via phone number and purchase an item end-to-end with real payment in sandbox mode. 2. Cart, order history, and push notifications mirror website data. 3. No critical UI/UX issues across latest two major OS versions on common devices. If you’ve published similar commerce apps before, especially with card + PayPal flows, your insight will be invaluable. Share a concise timeline and the stack you recommend, and we can get started right away.
Project ID: 40521772
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127 freelancers are bidding on average $245 USD for this job

Hello We are Ominfowave Software Services Pvt. Ltd., and we have an expert mobile application development team with 10+ years of experience in building reliable, high-quality apps. ? Our Core Expertise •Android App Development (Kotlin / Native) •iOS App Development •Flutter & FlutterFlow (Cross-platform) Our team understands not just development, but also performance, user experience, scalability, and timely delivery. ? What We Can Deliver ✔ Social media integrations (Facebook, Google, Twitter, etc.) ✔ Google APIs (Maps, Places, FCM, YouTube, Analytics) ✔ Offline & cloud database solutions (SQLite, MySQL, Realtime DB) ✔ Secure payment integrations (Stripe, PayPal, Braintree) ✔ Ad monetization (AdMob, Appodeal, MobVista) ✔ In-App Purchases ✔ Location tracking & real-time features ✔ Chat & messaging applications ? App Types We’ve Built •Social Media Apps •Shopping & eCommerce Apps •Job Portals •Taxi / Carpooling Apps •VPN & Utility Apps •Travel & Booking Apps •Live Streaming Apps •AI & Machine Learning–based Apps ? Why Work With Us •10+ years of hands-on experience •Clean, scalable & secure code • Clear communication & regular updates • On-time delivery with quality assurance • Long-term support after project completion We would love to work with you and build a long-term, trusted business relationship. Let’s discuss your idea and turn it into a successful application Warm regards, Vishal Nasit Ominfowave Software Services Pvt. Ltd.
$225 USD in 15 days
8.4
8.4

Hi there, Your app brief already reveals the real challenge: making mobile shopping feel as seamless as your web store while keeping checkout, login, and inventory perfectly in sync. That’s exactly the kind of commerce system I build with React Native, clean API integration, and a strong focus on performance and reliability. I’ve worked on ecommerce flows involving product sync, cart/order handling, OTP login, push notifications, and PCI-safe payment integrations like Stripe/Braintree. I can structure the app so it pulls from your existing REST/GraphQL layer, handles phone verification securely, and keeps the UI responsive across phones and tablets in both orientations. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. Do you already have the REST/GraphQL endpoints documented for products, cart, orders, OTP, and payments? Best regards, Asad
$75 USD in 3 days
7.1
7.1

Hello, We specialize in building AI powered algorithmic trading platforms for Indian F&O markets. Our expertise includes broker API integrations (Zerodha, Upstox), real-time market data processing, automated trade execution, AI/ML driven strategy optimization, NLP-based sentiment analysis, and advanced backtesting systems. ✔ Automated Trading & Broker Integration ✔ Real-Time Analytics & Risk Monitoring ✔ AI/ML & Sentiment Analysis ✔ Historical Backtesting & Performance Reports ✔ Live Dashboard for Signals, Orders & P&L ✔ Modular, Scalable Architecture We can deliver a robust, production-ready platform with complete source code, documentation, and deployment support. Let's connect Thanks.
$220 USD in 8 days
7.5
7.5

Hello, Your project “Intuitive E-Commerce Shopping App” is a strong fit for our cross-platform mobile app development expertise. We understand you need a high-performance Android & iOS shopping app that seamlessly syncs with your existing website, delivers smooth UX, and supports secure login and payments. We can help with: ✔ Flutter / React Native app development (single codebase) ✔ Integration with existing REST/GraphQL APIs ✔ Product listing, cart, checkout & order history sync ✔ Phone number authentication with OTP verification ✔ Secure token storage & session management ✔ Stripe / PayPal integration for PCI-compliant payments ✔ Push notifications and real-time updates ✔ Optimized UI/UX for phones & tablets We’re experienced with: ✔ Scalable eCommerce mobile applications ✔ Payment gateway integrations (Stripe, PayPal, Braintree) ✔ API-driven architecture & backend integration ✔ High-performance UI with lazy loading & smooth navigation Deliverables: ✔ Production-ready Android & iOS apps ✔ Full source code with documentation ✔ App Store & Play Store deployment support ✔ Clean integration with existing backend systems ✔ Tested, responsive, and stable release build Quick questions: 1. Are your current APIs REST or GraphQL, and which SMS/OTP provider (Firebase, Twilio, or existing system) should be used for authentication? 2. Do you need real-time order tracking or standard order status updates only? Regards Doomshell Software Pvt Ltd (20+ years experience)
$140 USD in 7 days
6.6
6.6

Hi, We would like to grab this opportunity and will work till you get 100% satisfied with our work. We are an expert team which have many years of experience on Mobile App Development, iPhone, Android, eCommerce, iOS Development, Payment Gateway Integration, React Native, Flutter Please come over chat and discuss your requirement in a detailed way. Regards
$210 USD in 7 days
6.3
6.3

Hello, I hope you are doing well. I understand that you are looking to build a E-COMMERCE SHOPPING MOBILE APPLICATION, and I would be happy to help. I have extensive experience in designing and developing applications and have successfully delivered many projects. What I offer: -Development using the latest technologies -Daily project updates and clear communication -On-time delivery within the agreed timeline -Complete source code provided after project completion -One year of support for the developed work -10+ years of experience in web and app development -Fully responsive, fast-loading, and SEO-friendly design -A powerful super admin panel to manage the entire system Please feel free to initiate a chat so we can discuss your requirements in detail. Thank you and regards, Dheeraj K.
$150 USD in 5 days
7.0
7.0

Hi, I have 5+ years of experience in Flutter. I will design and develop a fully functional Flutter mobile application for your business. The app will be cross-platform, responsive, and optimized for both Android and iOS. I will ensure smooth navigation, clean UI, and reliable performance. My Skills Include: a) Flutter Development – Expertise in building cross-platform mobile apps with responsive UI. b) State Management – Experienced in Provider, Riverpod, and Bloc for scalable apps. c) Backend Integration – Skilled in connecting apps with REST APIs, Firebase, and third-party services. d) Database Handling – Proficient in Firebase Firestore, MySQL, and SQLite. e) Deployment & Support – Experienced with publishing apps on Google Play Store and Apple App Store. Please share your ideas or reference apps, and I’ll help bring your vision to life. Lets connect in chat so that We discuss further. With Regards, Sai
$80 USD in 2 days
6.1
6.1

Hello! I am glad to say that i have already developed an E-Commerce Shopping App that seamlessly extends your existing e commerce platform to iOS and Android users. The goal is to provide customers with a native shopping experience while leveraging your existing product catalog, inventory, pricing, and order management infrastructure through existing APIs. My focus will be on delivering a responsive mobile application featuring product browsing, advanced search and filtering, lazy loaded catalogs, cart and checkout functionality, phone number based authentication with OTP verification, secure token management, native payment integrations for cards and PayPal, order tracking, and real time synchronization with your existing backend through REST or GraphQL APIs. I specialize in building scalable e commerce applications using Flutter and React Native, with strong experience integrating existing backend systems, payment gateways, authentication workflows, and high performance mobile architectures. My approach focuses on clean code, reusable components, optimized API communication, and future scalability for additional payment methods and features. Let’s connect to review your existing architecture, API capabilities, and mobile commerce goals so we can build a fast, scalable shopping application that delivers a premium customer experience across both iOS and Android. Best regards, Nikita Gupta.
$400 USD in 28 days
5.9
5.9

Hi there, We’ve developed several successful e-commerce apps, including a Shopify-based solution that integrated with a custom-built web app for seamless product and order synchronization. We also created a fully independent multi-vendor marketplace with integrated payment gateways and a robust admin panel for managing vendors and products. For your project, I recommend using Flutter for its ability to deliver a truly native experience on both iOS and Android. We can also enhance the web app with a responsive design that adapts to different screen sizes, ensuring a consistent experience across devices. Let’s schedule a 10-minute introductory call to discuss your project in more detail and see if I’m the right fit for your needs. Best, Adil
$140.97 USD in 7 days
5.9
5.9

This is the kind of setup where the web store already carries the logic, so the mobile app should mainly act as a fast, reliable client on top of your existing APIs. I’d start by reviewing your REST/GraphQL layer to confirm product, cart, and order flows are truly mobile-ready, then build the app skeleton in React Native with strict separation between data and UI state. OTP auth would be implemented early using a secure token flow with proper resend throttling and device-based storage. Once the core shell is stable, I’d wire product browsing with lazy-loaded images and cached queries so scrolling feels heavy, then move into cart and checkout using Stripe with PayPal as an alternate route, keeping both paths identical in validation. Push notifications and order sync would sit on top last. Edge cases like payment failures, inventory drift, and token expiry would be handled at the API boundary to avoid UI inconsistencies. I’ve built similar commerce flows in Ceevo where checkout reliability was the hardest part. map this out with your current endpoints.
$500 USD in 7 days
5.7
5.7

With over a decade of experience in web and mobile application development, my team and I have what it takes to bring your Intuitive E-commerce Shopping App vision to life. We specialize in creating versatile applications that ensure top-notch performance and user experience, fitting seamlessly across various devices and orientations as your project demands. Our proficiency in utilizing React Native for cross-platform development, in particular, will provide the consistency you require without compromising on performance. Regarding account security, we are well-versed in implementing robust phone number verification, OTP handling and secure token storage— minimizing vulnerabilities and safeguarding user data. Moreover, we've integrated major payment gateways like Stripe and Braintree before ensuring smooth Credit/Debit card and PayPal processing and PCI compliance to secure transactions. In terms of backend integration, we're skilled with REST/GraphQL endpoints which enable easy fetching and pushing of real-time product inventories and prices from your existing database. We also emphasize documentation for future maintenance, providing a comprehensive README with source code delivery. Considering our track record of delivering scalable, secure solutions whilst adhering to given deadlines—as evidenced from our international project journeys—I believe my team is the right fit for your project. Let's build something impactful together!
$30 USD in 7 days
5.9
5.9

Hello, I have reviewed your e-commerce mobile app requirement. We have experience developing cross-platform e-commerce applications using Flutter and React Native with secure payment integrations, OTP-based authentication, push notifications, and API-driven architectures. We can build a responsive iOS and Android app that seamlessly connects with your existing REST/GraphQL APIs, supports phone number login, Credit/Debit card payments, PayPal integration, cart synchronization, order history, and real-time inventory updates. Let’s discuss in chat. Thanks Invoke Tech
$140 USD in 7 days
5.6
5.6

Hello, I can help build a high-performance e-commerce mobile app for both iOS and Android using a single codebase while seamlessly integrating with your existing website APIs. Recommended Stack * Flutter (preferred for performance & cross-platform consistency) * REST/GraphQL integration with your existing backend * Firebase for push notifications * Stripe + PayPal integration * OTP-based phone authentication What I'll Deliver ✔ iOS & Android apps from a single codebase ✔ Phone number login with OTP verification ✔ Product catalog, search, filters & cart ✔ Native checkout with Card & PayPal payments ✔ Order history & push notifications ✔ API integration with your existing website ✔ App Store & Play Store deployment support ✔ Source code, documentation & handoff session Timeline * UI & Core Setup: 1–2 weeks * API Integration & Payments: 2–3 weeks * Testing & Store Submission: 1 week Estimated Delivery: 4–6 weeks Quick Question Is your current e-commerce platform built on Shopify, WooCommerce, Magento, or a custom backend? Thanks Pooja
$140 USD in 7 days
5.2
5.2

With my extensive experience in full stack development, I am more than equipped to take on your Intuitive E-Commerce Shopping App project. My previous work with eCommerce websites and mobile apps showcases my proficiency in delivering high-quality, user-driven solutions that scale smoothly. I've built apps using React Native that heighten the native experience while maintaining peak performance for both iOS and Android platforms. One of the key facets of your project is payment processing, and I have a deep understanding of implementing and integrating secure payment gateways like Stripe and Braintree. I’ve previously built commerce apps with card + PayPal flows which are similar to your requirements. Rest assured, your users' data security and compliance in sandbox mode will be meticulously addressed. Moreover, I am well versed in API-based development and utilizing REST/GraphQL endpoints efficiently. This means we can effectively link all your existing website's database that houses products, pricing, inventory, and order statuses to the app. Additionally, my fluency in Flutter and React Native, as reflected in my skill set, will allow for a smooth flow of data and a seamless user experience throughout the app. Let's deliver an e-commerce shopping app that not only reflects but enhances your established website!
$30 USD in 7 days
4.9
4.9

Hello! We can build a cross-platform mobile shopping app that fits your current e-commerce setup. 1. Do you already have stable REST or GraphQL endpoints for catalog, cart, orders, and auth? 2. Which payment gateway and phone verification provider would you prefer for the first release? — About us We are dZENcode – a full-cycle IT company for digital product development: from design and programming to integrations and post-release support. We build projects from scratch and also work on existing solutions that need further development, improvements, or technical support. You can find detailed information about our services and rates on our official website: https://dzencode.com. Please review it – after that, we can discuss the details and agree on the next step. ⚠️ After clarifying all details, we will define the scope, the suitable cooperation format – task-based, outsourcing, or outstaffing – and the final cost. Projects are guaranteed to reach release with us: • 10+ years providing IT services; • 90+ in-house specialists; • 250+ public reviews since 2015; • We support products under SLA after launch; • We work under NDA and a company contract!
$140 USD in 7 days
5.1
5.1

Hello, this is a straightforward mobile commerce build on the surface, but the real work is in keeping checkout, account state, and website data perfectly consistent across a cross-platform app. The main engineering risk is not the UI layer itself; it is state synchronization across auth, cart, inventory, payments, and order updates without creating edge-case failures at checkout. I’ve built several production systems where the hard part was separating client experience from backend truth and making the integration boundaries reliable. In your case, the app should stay thin where possible and lean on the existing REST/GraphQL surface, with a connector layer only where the current APIs are not shaped for mobile flows. The closest examples in my background are Dent-Cloud and Enterprise ProxyTool Client App, both of which required clear service boundaries, reliable API contracts, and production-grade synchronization between client and backend systems. I usually structure this as distinct layers for auth/session handling, catalog/cart/order APIs, payment orchestration, and notification/state sync. That keeps phone OTP, sandbox payment flows, and future wallet expansion from bleeding into the rest of the app. If useful, I can sketch the integration architecture first: mobile client boundaries, connector-layer needs, and the failure points around checkout and order-state mirroring. Clifton
$140 USD in 7 days
4.6
4.6

Hello, I’d be happy to develop your e-commerce mobile app for both iOS and Android using **Flutter**, which offers excellent performance, a single maintainable codebase, and a native user experience across devices. The app will integrate directly with your existing REST/GraphQL APIs, allowing products, pricing, inventory, carts, orders, and account data to remain fully synchronized with your website. If needed, I can implement a lightweight connector layer to optimize mobile API consumption. Key features: • Product catalog, search, filters, categories, and lazy-loaded images • Responsive UI for phones/tablets in portrait and landscape • Cart, wishlist, order history, and real-time order tracking • Phone number authentication with OTP verification, resend limits, and secure token storage • Native payment integration with Credit/Debit Cards (Stripe/Braintree) and PayPal • Push notifications for order updates, promotions, and abandoned carts • Offline caching for faster browsing and improved user experience I have experience building commerce applications with payment gateways, OTP authentication, API integrations, push notifications, and scalable architectures. I can ensure a smooth shopping experience that matches the quality of your existing web store while meeting App Store and Play Store requirements.
$30 USD in 4 days
5.7
5.7

Hey , Good morning! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in Flutter, Payment Gateway Integration, Mobile App Development, Android, eCommerce, iPhone, React Native and iOS Development. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Please keep me informed
$155 USD in 3 days
3.9
3.9

Hi there, I will build a cross-platform Flutter app that mirrors your existing e-commerce site via its REST/GraphQL endpoints, implementing phone-number OTP authentication and native card + PayPal checkout to meet PCI requirements. - Production-ready iOS & Android apps (single Flutter codebase) with Stripe and PayPal sandbox flows and end-to-end payment validation - Source code repo, CI build scripts, clear README and a recorded hand-off session covering environment variables and store submission - Staged rollout with post-deploy validation and rollback plan Skills: ✅ Flutter ✅ iOS Development ✅ Mobile App Development ✅ REST/GraphQL ✅ Stripe / PayPal integration ✅ App Store & Google Play deployment Certificates: ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 Available to start immediately. Is your existing website API REST or GraphQL, and do its endpoints already support authenticated cart/order sync plus webhooks for push notification delivery? $110 , delivery in 1 day. - ROLE & GOAL
$110 USD in 1 day
3.9
3.9

Hello, I have 12+ years of experience building eCommerce and mobile applications using Flutter, React Native, Node.js, Laravel, REST/GraphQL APIs, and payment gateway integrations. I recommend Flutter for a high-performance cross-platform solution with phone OTP authentication, Stripe/PayPal integration, push notifications, and seamless synchronization with your existing website APIs. The app will support responsive layouts, fast product browsing, secure checkout, order history, and real-time inventory updates while meeting App Store and Google Play requirements. I can deliver complete source code, deployment documentation, and a hand-off session, with an estimated timeline of 6–8 weeks depending on the existing API readiness. My cost will be approx 50USD/day. I am available to start immediately and would be happy to discuss your current website architecture and API integration details. Best Regards Jitendra Sharma
$50 USD in 1 day
3.9
3.9

Stockton, United States
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