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I am ready to move an existing concept into a fully-featured business application that runs natively on both Android and iOS. The core build needs secure user authentication and real-time push notifications from day one so staff and customers always see the latest account activity as it happens. Clean, maintainable code is a must; I plan to keep evolving the product, and future milestones may add payment integration and other modules, so the architecture should be prepared for that growth. If you prefer Kotlin + Swift, Flutter, or React Native, let me know why your choice fits long-term maintainability and App Store / Google Play compliance. To get started I will share wireframes, API endpoints, and a brief functional spec. You will return: • Complete Android and iOS builds ready for store submission • Source code in a private repo with clear setup instructions • A short hand-off session or video walkthrough so my team can run the project locally Experience publishing production apps, implementing Firebase (or similar) push, and setting up secure login flows will weigh heavily in my decision. If this sounds like a good fit, tell me about a recent project that matches these requirements and your preferred tech stack.
Project ID: 40565983
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342 freelancers are bidding on average $510 USD for this job

Hi, This is a long-term app foundation project: if auth, push notifications, and the code structure are not solid now, future features will become harder to ship. I’d recommend choosing the stack with maintainability, store compliance, and future scalability in mind. My first priority would be core architecture, secure login, and the notification pipeline so the app is stable before additional modules are added. I’d also ensure both Android and iOS builds are set up for a smooth handoff, with clean, locally runnable code your team can maintain easily. Initial work focus: Review wireframes and API flow Set up secure authentication Implement real-time push notifications Build reusable app structure Prepare store-ready release flow I have relevant experience building scalable mobile apps and can help set a strong foundation for payments and future business flows as well. Quick question: do you want a shared codebase for both platforms, or do you prefer a native split for compliance or scaling reasons?
$287 USD in 12 days
9.5
9.5

HELLO, . >>>> Multi languages (English and Arabic)Left-To-Right (LTR) and Right-To-Left (RTL) <<<< We have worked on similar Logistics, Transportation, & Marketplace platforms and can share relevant examples during our discussion. I have carefully reviewed your EEX concept and understand your vision of building a digital freight marketplace that connects verified truck drivers and shippers across Iraq while reducing empty return journeys through intelligent load matching. I have 10+ years of experience in Flutter, Firebase, Node.js, and scalable backend development, I can build a secure cross-platform application with driver and shipper authentication, smart load matching, GPS tracking, real-time notifications, multilingual support, in-app messaging, document management, and an admin dashboard. The architecture will be designed to support future modules such as online payments and additional logistics services without major redevelopment. I WILL PROVIDE 2 YEARS OF FREE ONGOING SUPPORT, COMPLETE SOURCE CODE, AND ASSIST YOU THROUGH THE ENTIRE PROCESS FROM DEVELOPMENT TO SUCCESSFUL PUBLISHING ON THE STORES. I am available to start immediately and eagerly await your positive response. Thanks. Christina
$394 USD in 9 days
8.4
8.4

With over a decade of experience in full-stack architecture and high-scale systems, I understand your goal of developing a cross-platform business app with secure user authentication and real-time push notifications for enhanced user engagement. My background in scaling Telegram Mini Apps for over 1 million users directly applies to the challenges your project may face in terms of scalability and security. A strategic insight for ensuring the long-term success of your project is to prioritize clean and maintainable code from the start, enabling seamless evolution and future module integrations. Drawing from my experience in native and cross-platform mobile development using technologies like Flutter, I am well-equipped to provide you with robust Android and iOS builds that meet App Store and Google Play compliance standards. I invite you to reach out to discuss how I can bring your vision to life and exceed your expectations. Let's collaborate to create a cutting-edge business app that sets new standards in user experience and functionality.
$600 USD in 20 days
8.3
8.3

Hi — Elias here from Miami. I see you're looking to transform an existing concept into a robust business application. The goal is to create a seamless experience across platforms, ensuring users find it intuitive and reliable. The real technical challenge often lies in maintaining consistent performance while integrating diverse functionalities. What usually matters most here is ensuring scalability and the ability to adapt to future needs. The tricky part is usually managing state across devices while keeping the user experience fluid. My approach would involve structuring the app with a clear separation of concerns, focusing on modularity. This way, we can enhance maintainability and easily integrate new features down the line. I've worked on similar projects where we prioritized stability and user feedback, which proved invaluable. A few questions to better understand the scope: Q1 – What specific user roles and permissions are you envisioning for the app? Q2 – Do you have any existing backend or API services that the app needs to integrate with? Q3 – What are your expectations regarding scaling, both in terms of user base and features? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
$500 USD in 5 days
8.1
8.1

With over six years of successful mobile application development experience under my belt, I am confident that I am the best choice to build your cross-platform business app. Not only have I led numerous projects similar to yours in both iOS and Android with a strong focus on security and real-time notifications, but I've also ensured they are ready for future expansion. In fact, fluent in Kotlin, Swift, Flutter, and React Native - I can tailor the best technological solution that guarantees both long-term maintainability and App Store/Google Play compliance. One area of my specialization aligns impressively with your needs - implementing push notifications through Firebase (or similar platform) alongside robust secure login flows. My recent project for a major retail brand demanded exactly this; I built their successful app that processed thousands of real-time activities while securely handling user accounts. Plus, my constant preference for clean, maintainable code ensures smooth iterations and scalability as per the evolving business requirements.
$500 USD in 7 days
7.2
7.2

Hello, I am highly interested in transforming your concept into a robust business application that operates seamlessly on both Android and iOS platforms. With expertise in Flutter, iOS Development, Android, React Native, and Kotlin, I am confident in delivering secure user authentication and real-time push notifications. My approach involves clean and maintainable code to accommodate future enhancements like payment integration. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I look forward to discussing this project further to ensure a successful collaboration. Best regards, Warda Haider
$250 USD in 4 days
7.0
7.0

This looks like a great fit, I will deliver store-ready Android and iOS builds using a single Flutter codebase, with Firebase Auth for secure login and Firebase Cloud Messaging for real-time push notifications. Flutter is my recommendation here because it gives you native performance on both platforms while keeping one codebase to maintain as you add payment modules and future features. On a recent business app, structuring the architecture with clean separation of concerns from the start made adding a payment layer later a straightforward plug-in rather than a rewrite. I will apply that same approach here. Questions: 1) Do you have existing backend APIs ready, or will I be building those as well? 2) Any preference on state management (Riverpod, Bloc) for the Flutter side? Looking forward to potentially working together. Thanks, Kamran
$276 USD in 10 days
7.5
7.5

| Mobile Application | Flutter | React | iOS | Android | Web Application EXPERT Hi, Thanks for sharing this opportunity! I have read your project requirements. Over the past 10+ years, I've built a strong foundation in full-stack development, specializing in mobile app development using iOS, Android, React Native, and Flutter. My proficiency in these languages would allow me to do so with great efficiency. Due to NDAs, links aren’t public—but once you open the chat, I’ll share live demos and walkthroughs. Why you should move forward with me : More than a decade experience in mobile and web app development. Full-time availability as well as daily updates and open to long-term engagements NOTE: Please pan the budget for now, we will discuss over chat. Thanks & Regards, Srishti
$500 USD in 7 days
7.0
7.0

Hello, I have 10 years of experience developing production-ready mobile applications for Android and iOS with scalable backend architectures. For your project, I recommend React Native, as it delivers a single, maintainable codebase while ensuring excellent performance, easier future enhancements, and compliance with App Store and Google Play requirements. I can implement secure user authentication, real-time push notifications using Firebase, REST API integration, and a clean architecture designed to support future modules such as payments and additional business features. My approach focuses on responsive UI, secure coding practices, performance optimization, and maintainable code, along with complete source code, deployment guidance, and a smooth handover process. I would be glad to discuss your wireframes and recommend the best implementation strategy. Best regards
$250 USD in 7 days
7.0
7.0

Hello, *** I am cross platform expert ****I can help you turn your existing concept into a production-ready Android and iOS application with secure authentication, real-time push notifications, and a clean architecture built for future growth. I recommend Flutter because it offers a single, maintainable codebase, consistent performance, and makes long-term updates and store compliance easier. What I will deliver: Flutter app for Android and iOS Secure user authentication Firebase push notifications API integration Scalable, clean architecture Store-ready release builds Source code with setup guide Handover session I have experience developing Flutter applications with Firebase, secure login flows, API integration, and production deployment. I focus on writing clean, maintainable code that is easy to extend as your product grows. Let us discuss your wireframes and functional requirements so we can start right away. Warm regards, Meera -A Mobil app expert
$500 USD in 7 days
6.8
6.8

I specialize in developing cross-platform business applications that meet your requirements. With expertise in creating secure user authentication and real-time push notifications, I ensure your app stays ahead in delivering the latest account activities. Your preference for Kotlin + Swift, Flutter, or React Native aligns perfectly with my skills. I have 20+ 5-star reviews on similar projects! I excel in publishing production apps, integrating Firebase push notifications, and implementing secure login flows. The worst that can happen is you walk away with a free consultation! Regards, InterconnectBPO
$400 USD in 7 days
6.8
6.8

Hello, I will develop your BUSINESS MOBILE APPLICATION for Android and IOS both platforms with Web admin panel. I am Tulsiram. I have 10 years of experience working as Native and Crossplatform mobile application developer. I am understood your requirements. I am glad if we are working together. If you interested then let's connect. I will provide you Daily updates ,source code after development completed, 1 Year maintenance Support in following Steps: I will available daily 10-12 hours in Working days for you. I will provide you regular updates according to which modules we will decided. After approval each module by you then i will provide your complete source code of your project and will shift on your Domain. Thanks
$250 USD in 22 days
6.6
6.6

Hello, I see you're looking to transform an existing concept into a robust cross-platform business application that supports both Android and iOS. To achieve a seamless experience, secure user authentication and real-time push notifications are crucial right from the start. For your needs, leveraging Flutter could be an excellent choice, allowing for a unified codebase while maintaining the native performance your app requires. I have extensive experience in building applications with Flutter, Kotlin, and React Native, which ensures both reliability and user engagement through an intuitive design. I will integrate a secure authentication system with OAuth2.0 to protect users' data and implement Firebase Cloud Messaging to handle push notifications effectively. Streamlining the app for both Android and iOS, including tablets like iPads, ensures your staff and customers have uninterrupted access to the latest account updates wherever they are. This approach not only aligns with your project's requirements but also facilitates easier maintenance and future scalability. Best Regards, Khorshed Alam, RS Software
$600 USD in 20 days
6.7
6.7

Hello, I understand that you are looking to develop a cross-platform business application for Android and iOS with secure user authentication and real-time push notifications. I have expertise in Mobile App Development, Android, iOS Development, Flutter, Kotlin, React Native, and iPhone. I will ensure clean, maintainable code to accommodate future growth and milestones such as payment integration. I have experience in publishing production apps, implementing Firebase push notifications, and setting up secure login flows. Please review my portfolio https://www.freelancer.com/u/Curveballsol for similar projects. I am committed to effective communication and delivering high-quality results. Best regards, Curveball Solutions
$250 USD in 2 days
6.3
6.3

Hello There!!! ★★★★ (Develop a scalable cross-platform business app with secure authentication and real-time notifications.) ★★★★ I understand you need a production-ready mobile application for both Android and iOS with secure login, push notifications, clean architecture, and future expansion capabilities. The app should be maintainable, store-compliant, and delivered with complete source code and documentation. ⚜ Cross-platform mobile app development ⚜ Secure user authentication ⚜ Firebase push notifications ⚜ API integration & data handling ⚜ iOS & Android store preparation ⚜ Clean scalable architecture ⚜ Source code & handover support I have experience building mobile applications using React Native and Flutter with secure authentication, API integrations, and notification systems. I’ll choose the best stack based on your long-term goals, focusing on performance, maintainability, and smooth App Store/Google Play approval. I’ll review your wireframes and APIs, develop the app carefully, test all flows, and provide proper documentation for your team. I am excited to help turn your concept into a reliable business solution. Lets discuss the next steps. Warm Regards, Farhin B.
$256 USD in 10 days
6.6
6.6

Hello, Your vision of transforming your concept into a scalable cross-platform business application aligns perfectly with the expertise of Doomshell Software Pvt. Ltd. We specialize in building secure, high-performance mobile applications with scalable architectures, real-time notifications, and seamless backend integrations that support long-term product growth. Our Approach • Develop a cross-platform app using Flutter for faster delivery and easier maintenance. • Implement secure authentication, Firebase push notifications, and scalable architecture. • Build clean, modular code ready for future payment and business modules. Our Delivery • Production-ready Android & iOS apps with complete source code. • Store submission support, documentation, and deployment assistance. • Handover session with setup guidance and post-launch support. Quick Questions • Are the backend APIs already complete, or will API development be part of the project? • Do you have a preferred authentication method (Email/Password, OTP, or Social Login)? Regards.
$730 USD in 7 days
6.3
6.3

Hi there, Hope you are doing well I'd love to help turn your business app concept into a production-ready cross-platform application for both iOS and Android. With extensive experience in mobile app development, I can deliver a scalable, secure, and high-performance solution that's built for future growth. Recommended Tech Stack Flutter for a single, maintainable codebase with near-native performance Node.js (NestJS) for a scalable backend PostgreSQL/Firebase for secure data management Firebase Authentication & Cloud Messaging for secure login and real-time push notifications What I'll Deliver Fully functional Android & iOS applications Secure user authentication and real-time push notifications Clean, modular, and well-documented code Source code in a private Git repository Deployment support for the App Store & Google Play Setup documentation and a hand-off walkthrough for your team I have experience building and publishing business applications with secure authentication, API integrations, push notifications, and scalable architectures. My focus is on clean code, excellent UI/UX, long-term maintainability, and timely delivery. I'm ready to start immediately and would be happy to discuss your wireframes, APIs, and project roadmap. Best Regards, Dheeraj K.
$250 USD in 5 days
7.0
7.0

Hi client I have read the project details. I am a professional mobile app developer and I can start work immediately. I ensure high quality work and good communication. I look forward to hearing from you. Best regards ! Jaffer Alfahdawi
$320 USD in 5 days
6.3
6.3

Hi, As a leader in the web service provider industry, we've built a strong reputation for designing top-notch mobile applications for clients worldwide. Our team is experienced in leveraging the power of Android and Kotlin to produce robust and efficient solutions. We understand the need for clean, maintainable code which is why our projects, even at their most complex, remain scalable, future-friendly and always ready for the next phase of development. We use the latest technologies and methods to customize our solutions to fit each unique project. In your case, we believe that Flutter would be a perfect fit for this cross-platform business app build due to its superior flexibility, fast performance, and ease of maintaining and updating codebases. With Flutter, you can rest assured that you'll have a nimble application that meets both App Store and Google Play's stringent compliance requirements. In terms of securing user authentication and implementing real-time push notifications via Firebase or similar services, we are more than capable of executing those tasks seamlessly so that you can receive valuable feedback on time. I would love to share more about our recent project where we successfully integrated Firebase's real-time push notifications and secure login flows if you're interested. Let's connect and discuss how my team and I can turn your vision into a reality with this business app! Regards
$700 USD in 10 days
6.2
6.2

Hello Client, Greeting of the day!!!! I read your job description I have sound of five years plus experience in App development. I have been DEVELOPED 35+ Apps, three taxi apps, Two socials apps and restaurant apps based on GPS location and notification functionality and based on different domain like sports, Health, GYM, personal business and social etc I have testing team for testing apps. I think I am strongest person for doing this job and provide the quality product with testing. I am always available for your support. Thanks Sr. Mobile Developer
$250 USD in 1 day
6.7
6.7

Derby, Iraq
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Member since Mar 26, 2021
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