Responsive Web & Mobile App Build

@shyamvijaywargiy

Hello , Nice to meet you! I will design and develop web and mobile application with web admin panel according to your requirement , ping me on chat so we can discuss this more. I am expert and 9 years experienced Android /iPhone app developer with backend work that you are looking for. I will provide you perfect product as you want so you would be happy with it. I am always ready to discuss about your project in detail as well as start from right now. The following are my services that i provide :- 1. Daily or Weekly update. 2. Clean and Robust code. 3. Responsible for communication for more than 15 to 20 hours each day. 4. Free Bug-Fix support for 1 year after completion. 5. Source code delivery. You can have a look at my profile by this link : https://www.freelancer.com/u/shyamvijaywargiy Let's contact me to discuss further details with me. Thanks Shyam

@irsolutions

With over a decade of experience in full-stack architecture and high-scale systems, I understand your goal of leveling up your business with a responsive website and cross-platform mobile app that seamlessly integrate. My background in handling high-complexity systems, such as serving over 1 million users with Telegram Mini Apps, directly applies to the challenges your project presents. For strategic insight, I recommend leveraging a unified tech stack like MERN/MEAN for its efficiency and scalability. My past success in building and scaling high-security systems aligns perfectly with your need for a secure backend handling user authentication and payment gateways. I invite you to reach out to discuss your project in more detail and to define the roadmap for our collaboration. Let's work together to create something exceptional for your business.

@om26er

Hi Tech stack we can use vuejs for frontend and backend in django. Mobile apps i can make Native apps. I have read the project but i did not fully understand the features. Can yku share more info in chat. Lets chat

@corpmember29

Hello, Responsive Web & Mobile App Developer {{{ I HAVE CREATED SIMILAR BEFORE AND I CAN SHOW YOU }}} I have carefully reviewed your requirements for a fully responsive website and cross-platform mobile app, and I understand that both platforms need to provide a consistent, fast and seamless user experience. I have 11+ years of software development experience and can develop the website and mobile apps with secure authentication, payment integration, push notifications and a reliable backend API. >>> 40-45 hours weekly I am available for work<<<< >>> you will track all progress of the project thru the tracker <<< I will follow your existing logo and brand guidelines while ensuring the interface is clean, responsive and optimized for performance. I will also handle testing, production deployment, App Store and Google Play submission, source code delivery and documentation. The solution will be built with a scalable architecture so additional features can be added easily in the future. I WILL PROVIDE 2 YEARS OF FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. I eagerly await your positive response. Thanks, Christina

@rahuliitm69

Hi Sir, Our USP is combining eye-catching, modern UI with high-performance engineering, so the product looks premium without sacrificing speed, responsiveness, or usability. For the frontend, we would use React.js for the website and React Native for the iOS and Android apps, allowing us to maintain a consistent experience while keeping development efficient. For the backend, we recommend Node.js with a clean REST API architecture, backed by a reliable database and secure authentication. We will integrate the required payment gateway and real-time push notifications while keeping the architecture scalable for future features. Performance will be a core part of our development rather than something checked at the end. We will optimize assets, API responses, code splitting, caching, database queries, and mobile performance to target the required sub-2.5-second Lighthouse load time on 4G. At the same time, we will preserve your existing logo and brand colours while creating a crisp, modern and conversion-focused interface. You do not need to worry about managing separate teams for web, mobile, backend, deployment, and store submission. We can handle the complete development cycle under one team with clear communication and proactive problem solving throughout the project. Thanks, Rahul

@techplusintl

★★★ REACT NATIVE & NODE.JS SPECIALIST ★★★ Hi, I can build a modern, responsive website and cross-platform mobile app to level up your business, including a secure backend, user authentication, and a robust payment gateway. What I'll do: - Design a fast-loading, device-agnostic website that ranks well. - Develop companion iOS and Android apps from a single codebase. - Implement a secure backend with real-time push notifications. - Ensure UI matches your existing logo and color scheme perfectly. - Deploy to production and submit to app stores with documentation. What tech stack would you prefer for the backend? Looking forward to your reply. Thanks!

@ozbas

As a full-stack software engineer with over 10 years in the industry, I possess a wealth of experience and a versatile skill set that makes me the ideal fit for your project. I've had hands-on experience with both web and mobile (iOS and Android) applications, making me well-versed with React Native and Flutter, the two frontrunners you're considering. When it comes to the backend, my proficiency extends to secure user authentication, payment gateways and real-time push notifications, courtesy of working extensively with APIs and services like Firebase/FCM. Not only can I ensure fluid communication between your platforms but my solutions are built to scale for long-term growth, which aligns perfectly with your vision. I understand the importance of staying connected during development. Based on my meticulously crafted timeline, you can expect key milestones like loading times under 2.5s on 4G and near-perfect adherence to brand guidelines. For verification purposes, here are two live web+app projects I've deployed: [Link A], [Link B]. I'm updated on the latest practices and deliverables needed for successful submissions of apps to respective stores and rest assured when our project ends, you'll have all source code in a Git repository along with concise documentation. Let’s build something phenomenal together!

@shivmirthyusl

Hi, As an industry leader with over 19 years of experience, our dedicated team at IT Flex Solutions has perfected the art of building transformative web and mobile applications tailor-made for businesses, like yours, to flourish on a digital playing field. We resonate with your project's demand for a rich, and equally fast cross-platform experience. Our proposed tech-stack would include React Native for the apps providing your users seamless experience independent of device choice alongside Node.js at the backend facilitating robust handling of authentication, payment gateway and real-time notifications. We're confident in delivering stylish, pixel-perfect UI aligning with your existing logo and color scheme sans any clutter. To ensure you feel in control post-launch we promise to deploy our work successfully on both the app stores under stringent guidelines while ensuring satisfactory handover of source code in a Git repository plus thoughtful documentation. Thanks, SBM

@webbookstudio

Hi there, We understand you're looking to elevate your business with a fully responsive website and a cross-platform mobile app that provides a seamless user experience. You need a modern website that's fast, ranks well, and is easy to navigate, along with companion iOS and Android apps that match the web experience feature for feature. At Webbook Studio, we've successfully delivered similar projects, such as a music voting mobile app built with React Native, React.js, and Node.js, and a furniture store mobile shopping app developed with Flutter and Node.js. We propose using a tech stack that includes React Native for the mobile apps, Node.js for the backend, and a modern frontend framework like React.js for the website, ensuring a clean API layer for secure user authentication, payment gateway, and real-time push notifications. We'd be happy to discuss the estimated timeline and major milestones with you. One question: Are there any specific third-party integrations or services you'd like us to incorporate into the project? Feel free to message us to discuss the details! — Webbook Studio

@kabirchy

Hi there, I understand you need a complete overhaul of your custom-built website with a fully responsive design and cross-platform mobile app that feels seamlessly connected. My approach would focus on building a modern web application using React Native for the mobile app and Node.js backend to ensure smooth data synchronization between platforms. I'll implement responsive design principles with mobile-first approach ensuring optimal user experience across all devices. For the frontend, I'll utilize AngularJS and JavaScript frameworks to create dynamic interfaces that work flawlessly on both web and mobile platforms. The development will follow agile methodology with regular checkpoints to ensure alignment with your vision. All code will be well-documented and scalable for future enhancements. Best Regards, Khorshed Alam, RS Software

@nikhilgarg96

Hello Greetings, After reviewing your project description, I feel confident and excited to work on this project for you. But I have some crucial things and queries to clear up. Please leave a message on chat so we can discuss this, and I can share my recent work similar to your requirements. Thanks for your time! I look forward to hearing from you soon. Best Regards.

@kisothjhc

Hello there. i will develop this web plus mobile responsive. I am mobile app developer with 10 years experience and having 4 years experience in flutter. Please reach out me to brainstorm this project Thanks S Kisoth

@Hammadhassan21

Hey, I’ve carefully reviewed your project, and I understand you need a connected web and mobile ecosystem built from the ground up, with consistent UX, strong performance, and a backend that can scale as the business grows. I can help structure the platform around a shared API and maintainable architecture. I will build the responsive website and cross-platform mobile app, implement secure authentication, payment processing, real-time push notifications, and the supporting API layer. I’ll also handle performance optimization, production deployment, app-store submission, Git handover, and documentation while keeping your branding consistent across every platform. I have hands-on experience with similar projects and would be happy to share relevant examples during our discussion. One quick question: Which payment gateway and notification provider are you currently considering, if any? Portfolio: https://www.freelancer.com/u/Hammadhassan21 Best Regards, Hammad Hassan

@mahig47

Hello! As per your project post, you are looking to rebuild your business presence with a modern responsive website and companion iOS and Android applications that share the same functionality and user experience. The goal is to create a connected ecosystem with a scalable backend, secure authentication, payments, push notifications, and a smooth path from development through production deployment. I can help build the platform using a suitable cross platform approach such as Flutter for the mobile applications, with a modern web frontend and a reliable API driven backend. The implementation will include responsive web pages, authentication, payment workflows, push notifications, API integration, performance optimization. I specialize in Flutter, React, Node.js, Django, REST APIs, payment integrations, Firebase services, responsive web development, and application deployment. I will also structure the project for maintainability and provide the complete source code through your Git repository along with concise documentation and deployment support. Let’s connect to review the existing platform and define the core workflows so we can build a fast, consistent web and mobile ecosystem that is ready to scale. Best regards, Nikita Gupta.

@giaphung2k1

Hello I can build your platform using a robust React and React Native stack to ensure your website and mobile app share a seamless codebase. I have extensive experience architecting scalable, performance-focused systems from the ground up that prioritize long-term maintainability. Do you have a specific feature roadmap in mind for this? Giáp Văn Hưng

@vishal1145

Your 2.5-second Lighthouse target on 4G will fail if you serve unoptimized images or skip lazy loading—most cross-platform apps ship 40% heavier than they need to because developers ignore bundle size until launch week. Quick questions - are you planning server-side rendering for SEO, or is this a client-heavy SPA? And what's your expected concurrent user load at month six so I can size the backend correctly? Here is the architectural approach: - REACT NATIVE + NODE.JS: Single codebase for iOS/Android with shared business logic, Node backend handling Stripe webhooks and JWT auth, Redis caching to keep API response under 200ms even during payment spikes. - REAL-TIME NOTIFICATIONS: Firebase Cloud Messaging integrated with your Node API so push delivery stays consistent across platforms without maintaining separate APNs/FCM pipelines. - LIGHTHOUSE OPTIMIZATION: Image compression pipeline using Sharp, code-splitting at route level, CDN distribution through Cloudflare to guarantee sub-2.5s loads even on throttled 4G connections. I've launched similar web-to-app ecosystems for two SaaS platforms that scaled from beta to 30K active users without performance degradation. Let's schedule a 20-minute architecture review so you see the deployment roadmap before committing to build.

@naminghn

Hi there, I see you're looking for a fully responsive website and a cross-platform mobile app that are seamlessly integrated. For this project, I recommend using React Native for the mobile app and Node.js for the backend to ensure efficient performance and scalability. This stack allows for a single codebase while maintaining a secure API for user authentication and payment gateway integrations. I estimate a timeline of approximately 14 days, with milestones for the website's initial launch, mobile app submissions, and thorough testing for performance on the latest OS versions. Let's discuss how we can meet your goals with clear communication and problem-solving at every step. Your satisfaction is my priority and I guarantee that I will deliver you a high-quality result. Regards, Ali

@rbtech1984

Hello!! A fast, responsive website and matching iOS and Android application can be built with a shared React Native and Node.js architecture, including secure authentication, payments, notifications, and production deployment. * Do you already have the complete feature list for the website and application? * Which payment gateway do you prefer? * Do you have the existing logo and brand guidelines ready? The solution will focus on clean user experience, strong performance, secure APIs, real-time notifications, and consistent functionality across web and mobile. Relevant web and mobile projects have been completed with reliable deployment and store submission. A quick chat will help finalize the roadmap, milestones, and timeline. Best regards Farhin B

@doomshellsl

Hello, A website and mobile app should feel like one seamless product—not separate experiences. We can build your platform from the ground up with consistent UI, secure APIs, payments, notifications, and smooth performance across devices. At Doomshell Software Pvt. Ltd., we have 20+ years of experience developing responsive web and cross-platform mobile applications. Our Approach: • Responsive website with fast loading and SEO-friendly architecture • Cross-platform iOS & Android app development • Secure APIs, authentication, payments and push notifications • Shared design system matching your branding • Cross-device testing, deployment and app-store submission Our Suggestion: We recommend a shared API architecture and design system so the website and apps remain consistent and easy to scale. Let’s schedule a quick 10–15 minute call to discuss your features, roadmap and technology.