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# React Native / Expo Developer Needed to Build iOS + Android App from Existing PWA We are looking for an experienced **React Native / Expo developer** to build and launch our mobile app for **iOS and Android**. The web/PWA version of the app is already built. The backend APIs already exist. The design, screens, flows, and functionality are already defined in the current PWA. This project is **not** a full app concept from scratch. The job is to rebuild the existing mobile/PWA experience as a proper native mobile app using React Native / Expo, connect it to our existing APIs, and prepare it for launch on the Apple App Store and Google Play Store. ## Project Scope You will be responsible for: * Building the iOS and Android app using **React Native / Expo** * Matching the existing PWA design, layout, screens, and user flows * Connecting the app to our existing backend APIs * Implementing authentication and session handling * Building reusable mobile UI components based on the current app design * Implementing all required forms, validation, navigation, and role-based flows * Ensuring the app works properly on common iPhone and Android screen sizes * Preparing production builds for iOS and Android * Assisting with App Store and Google Play submission * Providing basic handoff documentation ## Important Requirements * Do not redesign the app unless specifically asked. * Do not rebuild the backend. * Do not create new APIs unless approved. * Do not add new features outside the agreed scope. * The goal is to match the current PWA as closely as possible in native mobile form. * Code must be clean, maintainable, and structured for future development. ## Preferred Tech Stack * React Native * Expo * TypeScript * Existing REST APIs * iOS and Android production builds * App Store / Google Play deployment experience ## Ideal Candidate You should have: * Strong React Native / Expo experience * Experience converting an existing web/PWA product into a mobile app * Experience working with existing APIs * Experience publishing apps to Apple App Store and Google Play * Good communication and clean development practices * Ability to work quickly without drifting from the approved scope Please do not apply with a generic response. We are looking for someone who understands that the design, backend, and workflows already exist. This is primarily a mobile rebuild and launch project. ## Application Questions Please include answers to the following: 1. Have you built and launched React Native / Expo apps on both iOS and Android? 2. Have you converted an existing PWA or web app into a native mobile app before? 3. Will you use the existing APIs only, without rebuilding the backend? 4. Can you match an existing UI closely without redesigning it? 5. What is your estimated timeline for the first working beta build? 6. What do you need from us before starting? 7. Please share 2–3 examples of mobile apps you have built or launched. ## Deliverables * Working iOS app * Working Android app * Source code * Production-ready builds * App Store submission support * Google Play submission support * Basic setup and handoff documentation We are ready to move quickly with the right developer.
Project ID: 40550197
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Active 4 days ago
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216 freelancers are bidding on average $6,907 CAD for this job

Hi, The main risk is keeping the mobile rebuild aligned with the existing PWA flow while handling auth, session state, and API behavior cleanly on iPhone and Android. I’ve built apps where a web experience already existed, so I know how to match current screens closely without letting navigation, validation, or device sizing drift from the approved flow. My approach would be to map the current PWA screens and role-based journeys into a reusable Expo structure, then connect the existing REST APIs and login/session handling first. After that, I’d build the core forms, navigation, and responsive UI components, test across common device sizes, and prepare the app for production builds and store submission support. Initial focus: Review current PWA flow and screen structure Set up Expo + TypeScript app architecture Connect auth and session handling Build reusable UI/components Match key user journeys on iOS and Android Timeline: I can start by reviewing the PWA and outlining the mobile build plan immediately, then move into implementation once the scope is confirmed.
$5,087 CAD in 28 days
9.5
9.5

**LET'S TURN YOUR EXISTING PWA INTO A HIGH-PERFORMANCE NATIVE APP—WITHOUT CHANGING YOUR DESIGN OR BACKEND!** I understand this is a mobile rebuild, not a redesign or backend redevelopment. With **12+ years of experience** in React Native, Expo, TypeScript, and mobile app development, I've successfully converted web/PWA platforms into production-ready iOS and Android applications while reusing existing APIs and workflows. Yes, I have built and published React Native/Expo apps on both platforms, integrated existing REST APIs without rebuilding the backend, and accurately matched existing UI/UX with reusable components, authentication, navigation, forms, validation, and role-based flows. I'll deliver clean, maintainable code, production-ready builds, App Store & Google Play submission support, and complete handoff documentation. **Estimated Beta Timeline:** 2–4 weeks, depending on the app size. Let's schedule a quick call to review your PWA, API documentation, and project roadmap. I'm ready to start immediately and deliver a native app that closely matches your existing product.
$5,000 CAD in 25 days
8.3
8.3

With over a decade of experience in React Native and mobile app development, I understand your goal of transforming your existing PWA into a native mobile experience for iOS and Android. My background in building high-performance systems, such as scaling apps for over a million users, directly applies to the challenges of your project, ensuring a seamless transition and robust mobile application. A strategic insight for this project involves leveraging existing APIs efficiently to maintain consistency and streamline development. My success in launching complex mobile applications, like the one with over 1 million users, showcases my ability to handle projects of this scale with precision and expertise. I am eager to discuss your project further and outline a roadmap to bring your vision to life successfully. Feel free to reach out to me to schedule a conversation about how we can collaborate to meet and exceed your expectations for this mobile app development project.
$8,000 CAD in 60 days
8.3
8.3

Hi — Elias here from Miami. I see you're looking to develop a mobile app from your existing PWA using React Native and Expo. This is a solid approach, but the real challenge often lies in ensuring a smooth transition from web to mobile. Many projects run into issues like performance hiccups or UI inconsistencies across platforms. My approach would involve a careful review of your current PWA to identify key features that need to be optimized for mobile. I would prioritize maintaining a consistent user experience while leveraging the strengths of React Native. This way, we can ensure that the app feels native and responsive on both iOS and Android. A couple of questions to consider: How complex is your current PWA in terms of features? Are there specific functionalities that are crucial for the mobile experience? Looking forward to discussing this further.
$7,500 CAD in 26 days
8.1
8.1

Dear , We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in Mobile App Development, iPhone, Android, PhoneGap, iOS Development, React Native, Mobile Development, Expo and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
$7,446 CAD in 5 days
7.2
7.2

Hello, I'm interested in your project. I understand that the backend, APIs, design, and user flows are already complete, and the goal is to build a React Native/Expo app that closely matches the existing PWA without changing the functionality. Answers to your questions: 1. Yes. I have developed and deployed React Native/Expo apps for both iOS and Android, including App Store and Google Play submissions. 2. Yes. I have converted web applications into React Native apps while reusing existing APIs and maintaining the same user experience. 3.Yes. I will integrate with your existing REST APIs and won't modify the backend unless specifically requested. 4. Absolutely. My focus will be on creating a pixel-perfect mobile version that follows your current design and user flows. 5. Approximately 3–4 weeks, depending on the number of screens and features. 6. Access to the PWA, Figma (if available), API documentation, app assets, test accounts, and Apple/Google developer accounts. 7. I can share relevant React Native/Expo project examples and portfolio links during our discussion. A few questions: Approximately how many screens does the current PWA have? Are push notifications or offline support required in this phase? Which authentication method is currently used (JWT, OAuth, Firebase, etc.)? Will the app use Expo EAS Build for deployment? I'm available to start immediately and would be happy to discuss the project further. Best Regards, Dinesh L
$7,500 CAD in 20 days
7.1
7.1

This is a good fit for a focused React Native/Expo rebuild because the PWA already defines the screens, flows, and API behavior. I would start by auditing the current PWA routes, auth/session logic, forms, and API contracts, then reproduce the mobile experience as native iOS/Android screens rather than redesigning the product. My focus would be: - Expo/React Native app structure with reusable components matching the PWA - API integration, authentication, validation, role-based flows, and navigation - iPhone/Android responsive behavior, loading/error/empty states, and regression checks against the PWA - Production builds for App Store / Google Play, env setup, and release checklist - Clean repo handover with setup notes and build instructions I can deliver this in milestones: PWA audit, core navigation/auth, feature screens/API wiring, QA, then store-ready builds.
$10,000 CAD in 21 days
7.2
7.2

Hi there, I will take your existing PWA, rebuild it screen by screen in React Native with Expo and TypeScript, connect every flow to your current REST APIs, and get both the iOS and Android apps submitted to the stores. Since the design, backend, and user flows are already defined, I will treat the PWA as the single source of truth. No redesigns, no new APIs, no scope drift. On a recent project where I converted a web app into a native mobile build, structuring shared UI components early cut the total build time significantly and kept the codebase easy to maintain afterward. I will follow the same approach here. Questions: 1) Does the PWA use any browser-specific features (like Web Push or local storage) that need a native equivalent? Looking forward to talking through the details. Kamran
$5,547 CAD in 30 days
7.4
7.4

With an extensive background in mobile app development, especially with regards to **React Native and Expo**, I am confident that I am the perfect fit for this project. I have previously built and launched numerous React Native/Expo apps on both iOS and Android platforms which have garnered great user feedback. Moreover, I understand the crucial importance of using the existing backend, APIs, and adhering rigorously to the provided design, given that this a mobile rebuild project. My experience involves transforming web/PWA applications into native mobile apps while closely mimicking their original UI/UX design. Hence, I appreciate your emphasis on not drifting from the project scope or redesigning unnecessarily. With proven competencies in creating neat, maintainable code that aligns seamlessly with existing APIs and backend systems, rest assured I won't disrupt your established workflows. Given my solid track record of deploying projects on App Store and Google Play, I guarantee a smooth ride throughout the submission process. Lastly, my ability to work within agreed timelines without straying from the established scope will ensure we complete your app promptly. Let me offer you a highly-professional yet personalized mobile app solution crafted according to your vision.
$10,000 CAD in 90 days
6.9
6.9

Hi I have strong experience building and launching React Native / Expo apps for both iOS and Android using TypeScript, REST APIs, authentication, navigation, reusable components, and production build workflows. The main technical challenge is accurately converting the existing PWA into a native mobile app without redesigning, changing backend logic, or drifting from the approved workflows. I can rebuild the current PWA screens, layouts, forms, validation, role-based flows, and user experience closely in React Native / Expo. I can connect only to your existing APIs, implement secure session handling, structure clean reusable components, and make the app work smoothly across common iPhone and Android screen sizes. For launch readiness, I can prepare iOS and Android production builds, configure app assets, handle platform settings, and assist with App Store and Google Play submission. I will keep the code maintainable, scoped, and aligned with the current product instead of adding unnecessary features or backend changes. This fits my background in PWA-to-mobile rebuilds, Expo development, API integration, and mobile app deployment. Thanks, Hercules
$10,000 CAD in 7 days
6.6
6.6

Hello, I understand that you are looking for an experienced React Native / Expo developer to build and launch a mobile app for iOS and Android based on an existing PWA. As an expert in Mobile App Development with a specialization in Android, iOS Development, and React Native, I am well-equipped to handle this project. I have a proven track record of successfully converting existing web/PWA products into mobile apps, connecting them to backend APIs, and ensuring seamless functionality. I prioritize effective communication throughout the project to ensure your requirements are met. Please find examples of my previous work in my portfolio: https://www.freelancer.com/u/Curveballsol I am confident in my ability to deliver a high-quality mobile app that aligns with your existing PWA. Best regards, Curveball Solutions
$5,000 CAD in 10 days
6.3
6.3

Hi! Yes, I have experience building and launching React Native/Expo applications for both iOS and Android, including projects that consume existing REST APIs and follow established UI/UX designs. I understand this is not a redesign or backend rebuild—the goal is to faithfully recreate your existing PWA as a native mobile app while maintaining the same workflows and user experience. Answers to your questions: Yes, I've built and deployed React Native/Expo apps for both platforms. Yes, I've migrated web/PWA experiences into native mobile apps. Yes, I'll use your existing APIs only. Yes, I can closely match your current UI without unnecessary changes. Beta: 2–3 weeks (depending on app complexity and API readiness). I'll need Figma/design assets, API documentation, app icons/splash assets, and App Store/Play Console access. I'd be happy to share relevant portfolio examples during our discussion. A couple of questions: Have you finalized the API documentation and design assets? Are there any native features (camera, push notifications, biometrics, offline support, etc.) that the current PWA doesn't include but the mobile app should support? I'm ready to get started immediately and help deliver production-ready apps for both platforms. Regards Praggya
$5,000 CAD in 16 days
6.4
6.4

Hi there, Hope you are doing well Your project is a great fit for my experience. I understand that the backend, APIs, UI/UX, and workflows are already complete, and the objective is to rebuild the existing PWA into a high-quality React Native/Expo application without changing the current functionality. Develop the app using React Native, Expo, and TypeScript Match your existing PWA design and user flows closely Integrate with your existing REST APIs only (no backend changes) Implement secure authentication and session management Ensure compatibility across iOS and Android devices Deliver production-ready builds and assist with App Store & Google Play submission Provide clean, maintainable source code and handoff documentation Thanks & Regards Dheeraj K.
$5,000 CAD in 25 days
7.0
7.0

As an experienced AI & Embedded Systems Engineer, I have a broad skill set that makes me an outstanding fit for your project. While my core experience lies in designing and developing complete intelligent systems, my expertise also extends to mobile app development for both iOS and Android. Having built AI-powered mobile apps that connect seamlessly with various hardware and firmware devices, I am highly skilled in the nuances of building robust systems that communicate effectively between different components. Having converted PWAs into native apps before, I understand the intricacies of aligning the design, layout, screens, and user flows while connecting them seamlessly to existing APIs – all without compromising on code quality or veering off from the agreed scope. Moreover, my prowess in handling large-scale projects is evident through my prior work, where I've placed a strong emphasis on clean code structure, maintainability, and thorough documentation to ensure future development. Not only can I build your app using React Native / Expo, but I can also assist you with App Store and Google Play submission thanks to having successfully launched numerous apps on both platforms before. Moreover, my proficiency in TypeScript will provide additional benefits in terms of type safety and better code maintenance.
$9,000 CAD in 60 days
6.4
6.4

Hi, I understand this project involves transforming your existing PWA into a native mobile app for both iOS and Android using React Native and Expo. With extensive experience in building and launching React Native apps on both platforms, I am confident I can replicate your current PWA design, flows, and functionalities accurately. I have previously converted PWAs to mobile apps and have a solid track record working with existing APIs, ensuring seamless integration without backend modifications. I will focus on creating clean, maintainable code that aligns with your current design and user experience. My approach includes thorough testing across various device sizes and preparing the apps for quick deployment on App Store and Google Play. To start, I need access to your existing API documentation, design files, and any specific instructions for authentication and role-based flows. I will aim to deliver a beta version within 3 to 4 weeks, with ongoing support for submission processes. I look forward to collaborating and ensuring your app launch is smooth and efficient. Best, Justin
$7,500 CAD in 5 days
6.1
6.1

Hi there, We understand you're looking to rebuild your existing Progressive Web App (PWA) into native mobile apps for iOS and Android using React Native / Expo, leveraging your already defined design, screens, flows, and functionality, and connecting it to your existing backend APIs. With our strong experience in React Native, Expo, and mobile app development, including projects like a music voting mobile app built with React Native and a furniture store mobile shopping app using Flutter, we're confident in delivering a high-quality mobile app that matches your PWA's design and functionality. Our team has a proven track record of successfully converting web applications into mobile apps and publishing them on the Apple App Store and Google Play. We will ensure the app works seamlessly on common iPhone and Android screen sizes, implement authentication and session handling, and provide production-ready builds for both platforms. We're committed to clean, maintainable code and structured development for future enhancements. To confirm, we will use your existing APIs without rebuilding the backend, match the UI closely without redesigning it, and work efficiently to meet the project's timeline. One question: Are there any specific metrics or Key Performance Indicators (KPIs) you'd like us to focus on during the development and launch process to ensure the app's
$7,200 CAD in 30 days
6.1
6.1

Greetings, I am a skilled Mobile App Developer with expertise in React Native, iOS, and Android development, specializing in transforming existing PWAs into native mobile applications. My portfolio includes successful projects in this exact domain, ensuring a seamless transition and optimal user experience. My approach involves structured requirement confirmation, controlled planning, clean implementation, rigorous testing, and transparent milestone-based progress updates. By focusing on reliable execution and long-term results, I guarantee a high-quality outcome aligned with your business objectives. To better understand your priorities, could you please share your main goal for this project? Let's discuss further in an open chat to finalize the project scope smoothly. Best regards, Muhammad Anas Khan
$5,000 CAD in 12 days
5.8
5.8

Hi there, Transitioning an existing PWA to a native mobile app can be challenging, especially when maintaining design and functionality consistency. With my extensive experience in React Native and Expo, I offer a seamless conversion of your app, ensuring it aligns perfectly with your PWA's design and flows while preparing it for successful deployment on both app stores. Here are my questions to dive deeper: Will there be any need for integration with third-party services not mentioned? What is the expected timeline for the app store submissions? Drop me a message so we can get started right away!
$5,000 CAD in 25 days
5.8
5.8

As a seasoned React Native/Expo developer with a strong track record, I'm confident about my ability to rebuild your existing PWA into a native mobile app. I've converted PWAs to mobile apps before, and I recognize the importance of maintaining consistency, your designs and flows will be mirrored meticulously. Drawing from my extensive experience working in both iOS and Android environments, your project is in good hands as I've successfully launched several React Native/Expo apps on both platforms. Additionally, my team's ability to develop clean, maintainable code ensures future-proofing which aligns perfectly with your requirements. We understand the value of adhering to the agreed scope and have proven our knack for delivering projects efficiently without drifting away from the established plan.
$7,500 CAD in 7 days
5.9
5.9

Hello, You need to convert your existing PWA into a production-ready React Native/Expo mobile application, and I can deliver this with my 9+ years of experience in React Native, Expo, TypeScript, and cross-platform mobile development. I understand that your backend, APIs, UI, and workflows are already in place, so my focus will be on building a high-quality native app that closely matches your existing product without unnecessary changes. Answers to your questions: Yes, I have built and launched React Native/Expo apps for both iOS and Android. Yes, I have experience converting existing web/PWA platforms into native mobile applications. I will use your existing APIs without rebuilding the backend. I can closely match your current UI without redesigning it. The first working beta can typically be delivered within 3–4 weeks, depending on the app size. Before starting, I will need access to the PWA, API documentation, design assets, and developer accounts. Let’s discuss in chat as I have some queries to ask regarding the project to proceed further. Thanks
$5,000 CAD in 7 days
5.6
5.6

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