Cross-Platform Mobile App & Backend Development

@digitalaptech

Hello, At Digital Aptech Pvt. Ltd., we specialize in building production-ready, cross-platform mobile apps with robust, secure backends and real-time capabilities. Your project’s requirements for React Native (bare CLI), Node.js, PostgreSQL, and WebSocket-driven updates align perfectly with our technical expertise. Our High-Level Approach: 1. Mobile App (React Native – Bare CLI): Develop a performant, intuitive UI for both Android & iOS, with offline caching and reconnection handling for unstable networks. 2. Backend (Node.js + PostgreSQL): Implement a scalable API with server-authoritative WebSockets for real-time updates, Redis caching for hot data, and subscription validations via webhooks. 3. Payments & Subscription: Integrate Razorpay (or preferred gateway) with secure receipt verification, webhook handling, and subscription management. 4. Push Notifications: Configure FCM/OneSignal for transactional and real-time event alerts. 5. Marketplace & Admin Dashboard: Build a React-based admin panel for CRUD operations, product/order management, and event oversight. 6. DevOps & Delivery: Set up CI/CD pipelines, handle app store builds, and manage one iteration of submission feedback. With proven expertise in real-time, high-traffic apps, we can deliver a secure, scalable, and user-friendly solution on time and within budget. Please send me the NDA and lets connect to discuss further. Regards, Rajiv K

@MQamar123

With over seven years of experience in software development, I possess the robust skill set required for your Cross-Platform Mobile App & Backend Development project. Fluent in Java, C#, Python, and more, I am a versatile problem-solver ready to take on any challenge your project might present. As a tech enthusiast, I am always eager to explore and master new languages and frameworks - exactly what you need for this React Native, Node.js, and PostgreSQL-based project. My specialities lie not only in the individual domains but also in their collaborative brilliance. Seamlessly blending app and web development, and leveraging my understanding of cloud computing, I am well-equipped to create a cohesive system for your consumer app. From real-time event creation with server-authoritative updates through WebSocket to implementing secure payment systems like Razorpay or Stripe with webhook integration, my capabilities align perfectly with your needs. Moreover, I have extensive experience with mobile application store submissions on both Google Playstore & Apple AppStore ensuring your app will be production-ready and successfully launched into the market. I provide comprehensive solutions that include high-level architecture proposals, clear milestones, as well as keeping costs within firm estimates - all ensuring top-quality output while owning full source code strict-checking. Let's collaborate to bring your vision to life; rest assured!

@FreeLancers360

As a small but capable team of three, we have honed our craft in establishing multi-faceted digital solutions. With a primary focus on full-stack development, and proficient use of HTML, CSS, JavaScript, Node.js, React.js (including React Native), PHP and Laravel, we offer a broad range of skills across the entire tech stack you seek for your cross-platform mobile app project. We understand the unique intricacies and challenges of developing an application like yours that aims to provide real-time updates via websockets and relies on seamless payment gateways. Our experience with Razorpay (and other payment integrations) as well as webhooks ensures robust subscription models with validated experiences for improved user experience. Moreover, our expertise in handling offline resilience and caching (using Redis for hot reads) addresses intermittent network issues. We are not just skilled in delivering necessary features but also go the extra mile to ensure your app is submitted to stores without any glitches or hindrances. We have handled several successful submissions before and a similar level of accountability and diligence would be delivered in your case too.

@CodeniaTechno

Hello Jonathan1stokes, We are Codenia Technologies LLP, with over 10 years of experience in JavaScript, React Native, Mobile App Development, and Node.js. We have carefully reviewed your project requirements for a feature-rich cross-platform mobile app and secure backend. Our proposed solution includes leveraging React Native for the mobile app, Node.js with Postgres for the backend, and a React-based admin dashboard. We will implement real-time event updates via WebSockets, a subscription model with server-side validation, secure payment integration, push notifications, marketplace functionalities, offline resilience, and CI/CD support. We would like to discuss your project further to ensure a successful collaboration. Thanks, Rupesh Kumar

@yuriik14

Hello, High-Level Architecture: Frontend: React Native (bare workflow) for Android and iOS with offline resilience and push notifications (FCM / OneSignal). Backend: Node.js (NestJS or Express) API server with WebSocket support for real-time event updates. Database: PostgreSQL for persistent data storage, Redis for caching hot reads and session management. Payments: Razorpay/Stripe integration with server-side subscription validation and webhook handling. Admin Dashboard: React-based lightweight panel for CRUD operations and marketplace management. CI/CD: Automated pipelines for building, testing, and deployment; support for app store submission. Milestones & Timeline: Architecture & Setup – Backend, database schema, WebSocket server (1 weeks) Core Mobile App Development – Event creation, live updates, offline mode (2 weeks) Payment & Subscription Module – Razorpay/Stripe integration, webhooks (1 weeks) Admin Dashboard & Marketplace Features – CRUD, order management (2 weeks) Testing, CI/CD & Store Submission Support – Bug fixes and store compliance (1 weeks) I’ll ensure full ownership of source code on complete payment. NDA is ready to sign. Relevant experience includes building scalable React Native apps, complex Node.js backends, real-time WebSocket apps, and secure payment integrations. Looking forward to discussing this in detail. Thank you for your time

@dhaval070

Hello, ✅ Ready to sign the NDA. ✅ Ownership of source code upon full payment. I’m an experienced full-stack developer with 5 years of expertise, ready to deliver your production-ready cross-platform mobile app (React Native bare workflow), secure Node.js backend with PostgreSQL, real-time WebSocket updates, subscription/payment integration, push notifications, and an admin dashboard in React. I’ll ensure offline resilience, caching with Redis, smooth CI/CD, and assist with app store submission for both Android and iOS. ✅ Looking forward to the project documentation for the timeline and estimation. Let’s chat further to clarify all details and ensure the plan perfectly fits your vision and deadlines. Warm regards, Dhaval B.

@Associative

Project Understanding: We'll develop a production-ready cross-platform mobile app (React Native) with a secure backend (Node.js, PostgreSQL) and a React-based admin dashboard. Our solution will cover real-time updates, a subscription model, secure payments, push notifications, marketplace functionality, and offline resilience. Proposed Solution: Our team will build this project from scratch, ensuring a robust and scalable architecture. We won't use third-party code for the core product, guaranteeing you exclusive ownership of the entire source code. We'll leverage our expertise in React Native, Node.js, and PostgreSQL to deliver a high-quality, feature-rich application. High-Level Architecture: Frontend: React Native (bare CLI) for a native-feel mobile app on Android and iOS. Backend: Node.js (Express) with PostgreSQL for a secure, scalable server. Real-time: WebSockets for live updates and communication. Data: Redis for caching to ensure offline resilience and fast data access. Payments: Integration with Razorpay or similar for secure transactions and subscription management via webhooks. Notifications: FCM/OneSignal for push notifications. Admin: A lightweight React-based dashboard for CRUD operations. A detailed project plan with milestones and a firm cost estimate will be provided upon review of the requirements and signing of the NDA. Warm regards, Associative, Pune

@EchoHaven

"I see a great alignment between the project needs and my capabilities! Your project requires expertise in React Native for cross-platform mobile app development, Node.js for backend, and Postgres for database - all skills I possess. I specialize in building user-friendly, secure, and seamless applications. I may be new to Freelancer, but I have a strong background and a proven track record off-platform." "I'd really love to hear more about your project! I'm happy to offer a free initial consultation to help get things started and see how I can best support your goals." Kind Regards, Juan K

@ralphyh

Hi, I am a full-stack developer with 10 years of experience. I have acted as software architect and technical lead on a number of projects. I'm willing to sign an NDA. My primary skill set includes React + Redux on the client and Node.js on the backend. I can develop mobile applications using React Native and Cordova (Ionic/PhoneGap). I have worked with SQL and NoSQL databases, including PostgreSQL, and also with cloud solutions such as Firebase. I worked with push notifications technology, websockets, so they are not new for me. I have knowledge and experience with CI/CD. Almost all of my projects have involved the development of a CMS/admin dashboard. I have developed various payment solutions. I have experience with payment providers such as PayPal and Stripe. I have also integrated crypto payment methods. I have experience with cross-platform applications. For example, RentalClub - an application for suppliers of construction and specialised equipment for rental. One of my video chat projects is web a platform where users search for experts in various areas and buy online consultations. You can find it in my Upwork portfolio. Here are some other examples of my past projects: - ScopeSports - NFT-marketplace and social network with paid access to exclusive content and direct communication with sports athletes. The non-blockchain functionality is a hybrid of Facebook and Discord. Chats, posts with videos or pictures, comments, each athlete and his audience have their own private fan club. - Jamble - a German Tinder-like dating app. The service has a sophisticated matching algorithm based on profile preferences and matching quizzes. Voice/video chats and personal content sharing are available for the premium membership plan. I have a pretty decent amount of projects in my portfolio. I am happy to tell more during a video call.

@abdulmuteenkhan2

I will build a production-ready cross-platform app (React Native bare CLI) with a secure backend (Node.js + PostgreSQL) and React admin panel, featuring real-time updates via WebSockets, offline support with Redis, secure payments (Razorpay/Stripe) with webhook validation, push notifications (FCM/OneSignal), marketplace, and admin CRUD. Why me: • 4+ years in full-stack development with proven delivery in React Native, Node.js, Postgres, WebSockets, and payment gateway integrations. • Experience in server-authoritative real-time systems and offline-first architectures for mobile apps. • Prior success in app store submissions for both iOS and Android, including handling rejection fixes. • Strong focus on security, performance, and maintainable code with full source code ownership. High-Level Architecture: • Frontend (Mobile): React Native (Bare CLI) + Offline-first storage (SQLite/AsyncStorage) • Backend: Node.js (NestJS/Fastify), PostgreSQL, Redis, WebSockets, REST API • Admin Panel: React + Secure JWT-based • Payments: Razorpay/Stripe with webhook-based subscription validation • Hosting: Dockerized deployment (AWS/GCP/Azure) with CI/CD • Notifications: FCM / OneSignal integration Milestones: 1. Project Setup & Architecture Finalization (1 week) 2. Backend API & WebSocket Implementation (2–3 weeks) 3. Mobile App Core Features (3–4 weeks) 4. Payment & Subscription Integration (1 week) 5. Admin Panel & CRUD Features (1 week) 6. Testing, CI/CD, Store Submission (1–2 weeks)

@ananthulskumar

Glad to connect! I’m Ananthu from Coderspace Solutions. We build custom mobile & web apps with: UI/UX design Flutter frontend Backend + Admin panel + APIs WebSocket real-time features Testing & Deployment Happy to discuss your project ideas anytime. Best, Ananthu LS Kumar Coderspace Solutions

@varun2887

We’ve reviewed your requirements and have strong experience in all the technologies mentioned — React Native (Bare CLI), React, Node.js (Express/Fastify/NestJS), PostgreSQL, WebSockets, Redis, Stripe/Razorpay, push notifications, and CI/CD. We’ve built and deployed similar production-ready apps before and can share live examples over chat. Ownership: You get full source code on final payment. NDA is ready. Cost & Timeline: Will provide a firm quote and milestone plan after a short discussion to finalize details.

@jagjuot

Hello, I have 2 years of experience in full-stack development and have delivered production-ready mobile apps and backend systems using: 1. React Native (bare workflow) 2. React.js 3. Node.js (Express/NestJS) 4. PostgreSQL 5. WebSockets 6. Redis I can help you build your cross-platform app (Android & iOS) with a secure backend and lightweight admin dashboard. **Architecture & Features:** - React Native bare CLI app with offline support, caching, and WebSocket client for real-time updates - Node.js + PostgreSQL backend with WebSocket server, subscription validation, and payment webhooks (Razorpay/Stripe) - React.js admin panel with marketplace CRUD and role-based access control - Push notifications (OneSignal/FCM), JWT authentication, and CI/CD setup - Offline resilience + Redis caching for hot reads **Why Me?** - 2 years’ experience in scalable mobile + backend systems - Past work includes payments, subscriptions, and WebSocket-driven features - Can deliver within your $1500 budget while ensuring clean, production-ready code - Ready to start immediately and work full-time till completion I’m happy to sign an NDA and provide a detailed breakdown with timelines. Let’s connect to get started. Best regards, Jagjot Singh Ajmani

@islamlarabi02

I am an experienced full-stack developer with strong expertise in React Native (bare CLI), React, Node.js, PostgreSQL, WebSockets, and payment integrations (Razorpay/Stripe). I can deliver your cross-platform mobile app, secure backend, and lightweight admin dashboard with features including real-time event updates, subscription management, push notifications, marketplace basics, offline support with Redis caching, and CI/CD setup. I will provide a clear architecture plan, defined milestones, and a fixed cost under NDA, with full source code ownership upon completion.

@harshdogney7766

Full-stack dev with 1yr+ exp. in RN, Node, Postgres. Can deliver secure, scalable app with all features .