Senior Mobile App Developer -- 2

@eclairios

Hello, Your search for a Senior Mobile App Developer focused on real-time messaging, secure payments, and robust referral systems for a 1-month contract is a perfect match for my expertise. I specialize in building and optimizing consumer-facing applications, ensuring high performance, scalability, and an excellent UI/UX. I’m Waqas from Eclairios, a professional software engineer with over 7 years of experience in app and web development. I have successfully completed 128 projects, earning a 5.0 rating from satisfied clients. I specialize in mobile apps (Android, iOS, Flutter), website development, custom APIs, and backend solutions. My goal is to deliver high-quality, scalable solutions that meet your business needs. Why hire me? ★ 100+ Projects Completed with 5-star rating. ★ 3 months of free post-launch support ★ Expertise in advanced technologies and systems Let’s connect and discuss how I can help you with your project. Best regards, Waqas

@mrresearcher99

Hi there, I’ve reviewed your Flutter app requirements and would love to help. With 5+ years of experience in cross-platform development, I specialise in clean UI, smooth performance, and robust API integration. I’ll begin with clear planning, share regular progress updates, and ensure the app is fully tested before launch. Let’s connect to discuss your vision — I’m ready to get started! Best, Bhargav Flutter Developer | Android & iOS Expert

@InterconnectBPO

Hi, We can support your team on this 1-month sprint and deliver high-performance messaging + payments features with production-ready quality. We’ll: Enhance real-time messaging (1:1, group chat, media, call handling) using scalable architectures (WebSockets / WebRTC) Implement audio/video calling and optimize reliability under load Integrate secure payments and referral/reward flows Deliver pixel-perfect UI from your designs with smooth 60fps performance Use AI-assisted tools like GitHub Copilot and ChatGPT to accelerate development Ensure clean, maintainable code and fast iteration with your team We’ve worked on real-time systems and high-traffic apps, focusing on stability, scalability, and user experience. We’re available to start immediately and commit full-time for the duration. Let’s align on priorities and begin. Regards Interconnect Team

@rbtech1984

Hello There!!! ★★★★ ( Scalable messaging + payments app with real-time performance & clean UX ) ★★★★ I understand you need a senior developer to enhance a messaging + payments app with real-time chat, calls, referrals, and scalable performance, while improving UI and adding new features quickly. ⚜ 1:1 & group chat with Socket/WebRTC ⚜ Audio/video call integration & handling ⚜ Secure payment & referral system ⚜ Scalable architecture & performance tuning ⚜ Pixel-perfect UI/UX implementation ⚜ API integrations & backend sync ⚜ AI-assisted dev workflow I have experince building real-time apps with chat systems, API integrations and smooth UI. Worked on features like messaging, push notifications and scalable flows. My approach is to optimize existing system, implement features using socket/WebRTC, and ensure stability under load with clean modular code. Available to start immediatly and dedicate fully. Warm Regards, Farhin B.

@durgesh8527

Throughout my extensive 12+ year career in full stack development, my specialty has always been building robust, scalable, and high-performing web and mobile applications. I have a deep understanding of real-time messaging systems and have successfully implemented this functionality in several of the apps I've developed, including chat, media/file sharing, audio/video calling and even group audio/video calls. My experience extends to creating secure payment integrations and implementing referral/reward systems; features that align directly with your project requirements. In past projects, I have built apps that have scaled to large user bases which demonstrates my capacity for optimizing app performance and ensuring scalability when faced with high user traffic. To enhance my productivity and code quality, I am familiar with AI-assisted coding tools such as GitHub Copilot and Cursor which further cement my qualification for your task. My large repository of skills spans mobile app development (Android / iOS), React Native, Flutter, Android, iOS among others and I'm comfortable working with different API integrations as well as backend communication – so regardless of the frameworks you are using I will be able to work efficiently within your technology stack.

@kishanbwts

I’ve worked on messaging apps with 1:1 and group chat, including media sharing and real-time call handling using WebRTC and socket communication. In one project, I helped improve app performance under heavy user load by optimizing network calls and UI responsiveness, which should be directly useful here. To ensure smooth payments and referral rewards, I suggest integrating secure, tested payment SDKs combined with efficient backend event handling to keep the user experience seamless and scalable. Have you already chosen the payment providers, or should I recommend ones that have worked well in my past projects? Also, for call handling (busy, disconnected, or other call state detection), I’m curious about the current backend setup—is it fully in-house or using third-party signaling? Optimizing that will greatly reduce dropped calls and improve UX. I’m ready to jump in full-time and quickly enhance your messaging and payments features while making sure everything scales smoothly. Just let me know when you want to start.

@Riasatali78

Hi, I’m a Senior Mobile App Developer with 7+ years of experience building scalable Android apps, including real-time chat systems using WebSockets/Firebase and secure payment integrations. I’ve worked on high-performance apps with clean architecture (MVVM, Retrofit, WebRTC) and optimized them for large user bases. I can quickly enhance your messaging, payments, and referral system while maintaining smooth UI/UX and scalability. Available to start immediately and work dedicated for this 1-month contract.

@bholakumar2298

Hi there, I’m senior mobile app developer, I have good experience in chat messaging and video calling apps development, I can optimise your existing apps in short time. Period. Let’s connect to get started. Thank you.

@abhishek060

Hi, Your requirement for a Messaging + Payments + Referral app is exactly the type of system I’ve worked on recently. I specialize in real-time messaging, WebRTC calling, and scalable consumer apps, and I can join immediately for your 1-month contract. I can quickly help with: • 1:1 & Group Chat • Audio/Video Calls (WebRTC) • Media/File Sharing • Payment Integration • Referral & Reward System • Performance & Scalability Improvements I’ve worked on real-time messaging and payment apps with high concurrent users, focusing on low latency, call reliability, and production-scale performance. Since this is a short contract, I’ll: • Quickly understand your existing code • Prioritize high-impact improvements • Deliver fast within the 1-month timeline ✔ Full-time availability ✔ Immediate start ✔ Daily updates If you share your current tech stack or app link, I can quickly review and suggest the first improvements within a few hours. I’m ready to start right away. Best regards, Abhishek

@mobiwebsolutions

✋ Hi There!!! ✋ The Goal of the project:- Enhance and scale a real time messaging and payments mobile app with secure, high performance features. I have carefully read your requirement for improving a messaging and payments based app including chat, calls, referrals, and scalable performance, and I understand the need for reliability and smooth user experience under high load. I am the right fit because I have strong experience building real time mobile apps with secure integrations and scalable architecture. • Real time messaging implementation using sockets or WebRTC with chat, media, and calling features • Secure payment integration with referral and reward system logic • Pixel perfect UI/UX with performance optimization and stable API integration I will also provide UI design, database management, testing, deployment support, and full source code delivery with documentation. I bring 9+ years experience as a full stack developer and have completed similar chat and payment apps handling large user traffic. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!

@webnsoftindia

***** Senior Mobile App Developer | Messaging, Payments & Referral Systems ***** Hi, I checked your JD and you need a developer to enhance a real-time messaging and payments app with scalable, high-performance architecture within a 1-month timeline. I have strong experience building chat systems (1:1, group), media sharing, and audio/video calling using WebRTC and socket-based architectures. I’ve also implemented secure payment integrations and referral/reward systems with reliable tracking and scalability. I focus on pixel-perfect UI, performance optimization, and clean, maintainable code using modern tools and AI-assisted development. Thanks

@santoshkumars17

Drawing from a decade of experience in mobile app development with a focus on both Android and iOS platforms, I'm confident I have the right skillset to excel in this role. I have designed and built highly successful messaging apps with real-time capabilities and efficient payment systems that aligned beautifully with desired designs and scales. This project piques my interest because it combines several elements that I'm passionate about: messaging, payments, and referral/reward structures - all of which I have personally implemented before. Not only do I have a deep understanding of scalable architecture, performance optimization; but I am also conversant with AI-assisted coding tools such as GitHub Copilot and ChatGPT, which can certainly enhance my productivity efficiency further. My experiences with WebRTC, socket-based messaging, and real-time communication frameworks are valuable for developing an app that operates seamlessly under heavy traffic. But what separates me from the rest is not just my technical capabilities. It's the way I approach any project - with immense dedication to high-quality codes that are easily maintainable or scalable. With me on your team, you can be confident of on-time delivery, clear communication and end-to-end development support. Together, let's build an exceptional mobile app experience!

@safalbhatia786

Hello Sir/Ma’am, I hope you are doing well. I’ve carefully reviewed your requirements and understand that you need support in enhancing a real-time messaging and payments-based mobile application with a strong focus on performance, scalability, and user experience. I have hands-on experience with mobile application development concepts, API integrations, and building responsive, user-friendly interfaces. I am familiar with real-time communication patterns (such as socket-based systems), structured workflows, and integrating third-party services. I can contribute to improving existing features, implementing UI updates, and ensuring smooth app performance. I am comfortable working with modern development tools and AI-assisted coding platforms like GitHub Copilot and ChatGPT to enhance productivity and maintain clean, scalable code. I can collaborate effectively with backend and product teams to deliver features efficiently within the given timeline. I am available to start immediately and can dedicate full-time effort to this 1-month engagement. I’m highly adaptable, quick to learn, and focused on delivering reliable results. A few questions to better understand the project: I’d be glad to contribute to your project and support your team in delivering a high-quality application. Thank you. Best regards, Safal Bhatia

@NextTechs

I’m interested in this opportunity and can contribute effectively to your messaging and payments-based application. I have 11+ years of experience in mobile and full-stack development, with strong expertise in real-time systems, scalable architecture, and high-performance apps. Relevant Experience: • Built real-time features including 1:1 chat, group chat, media sharing, and notifications • Experience with WebRTC, socket-based communication, and live systems • Developed consumer-facing apps handling high user traffic and performance optimization • Strong focus on clean, pixel-perfect UI/UX implementation Payments & Monetization Expertise: • Strong experience in Carrier Billing, In-App Purchases, and Subscriptions • Integration of third-party payment gateways (including recurring billing and webhooks) • Secure transaction handling and scalable payment architecture What I bring: • Ability to quickly understand and improve existing systems • Clean, maintainable, and scalable code • Fast delivery with AI-assisted development tools • Experience working across mobile, backend APIs, and cloud systems I am available to start immediately and can work dedicatedly for this 1-month engagement. I’d be happy to share relevant apps and discuss your requirements in detail.

@RajAbhisek

Hello, I saw your post for a Senior Mobile App Developer for your messaging and payments app. This sounds like a project we can definitely help with. I have strong experience building real-time messaging features, including 1:1, group chat, media sharing, and audio/video calls, just like you need. I've also worked on secure payment integrations and referral systems, ensuring both performance and a great UI/UX. We know how important scalability is for consumer-facing apps. We are comfortable using AI-assisted tools to speed things up and maintain code quality. We understand the need for a dedicated developer for this 1-month contract. We are ready to jump in and start improving features and adding new capabilities quickly. We are confident we can deliver a high-quality, reliable app for you. Please ping us on chat so we can discuss this further. I can share relevant app links and details there. Raj Abhisek Panda

@himanshus642

Hi, This is a strong real-time system build — messaging + payments + scalability. I’ve worked on backend-heavy systems and understand socket-based communication, API integrations, and performance optimization. I can contribute across: * Real-time messaging (1:1, group chat, media sharing) * Call handling flows (state sync, edge cases) * Secure payment integrations * Referral/reward logic with tracking My approach: * Scalable architecture (API + real-time layer) * Efficient state handling for messaging/calls * Clean, responsive UI integration * Performance optimization for high user load ✔ Tech I’m comfortable with: * Node.js / Python (FastAPI) for backend * WebSockets / real-time APIs * Mobile integration (React Native / Flutter support) ✔ Experience: * Built API-driven systems with high data flow * Worked with real-time updates, event-based systems * Focus on clean, maintainable, scalable code Quick question: What’s your current messaging stack (WebSockets, Firebase, or third-party SDK)? I can join immediately and work dedicated for the 1-month timeline. Let’s discuss

@GobindSawarn

As an experienced Senior Mobile App Developer with a history of building consumer-facing apps, including those with messaging and payments functionalities, I am confident that I am the best fit for your project. My strong focus on clean code, scalable architecture, and high-quality UI/UX implementation aligns perfectly with your project's requirements. Over the years, I've gathered substantial experience working on real-time messaging platforms, secure payment integrations, as well as implementing user-friendly referral/reward systems. One aspect that sets me apart is my proficiency in AI-assisted development tools like GitHub Copilot; I constantly seek efficient, innovative ways to improve productivity and code quality while maintaining the highest standards. Furthermore, my familiarity with WebRTC and socket-based messaging will be invaluable in establishing a robust and reliable messaging system for your app. Lastly, my work has demonstrated successful scalability. I have previously built applications that scaled gracefully to large numbers of users without compromising performance or user experience. With me as part of your team, you can rest assured knowing that not only will your app will be built on solid foundations but it’ll also perform at scale—delivering a flawless experience for each user.

@mahads31

As a seasoned Mobile App Developer with a deep understanding of Messaging, Payments, and Referral/Reward Systems, I can confidently say that I'm the right fit for your project. My extensive experience includes creating high-performing real-time messaging platforms to accommodate features like 1:1 chats, media/file sharing, audio/video calling, group chats, and more. Additionally, I've successfully scaled applications to handle massive user traffic, making me adept at optimizing app performance. In terms of design implementation, I prioritize building pixel-perfect UI/UX as per the provided designs which is essential for an app's success among consumers. Moreover, I'm well-versed in API integrations and backend communication - vital for incorporating secure payment systems into your app. I also have experience using AI-assisted coding tools for improved productivity and code quality. Most importantly, my work is always focused on scalability and future-readiness, ensuring that the digital solution remains efficient and impactful even as your business scales. With this skill set and mindset in mind, I humbly offer my services to meet your project requirements and guarantee a deliverable that ퟦs stable, scalable, and tailored to your visions.

@Mayurisharma7619

Dear client, I can handle your requirement for messaging app, payments, and referral system with full features and good performance. I have 6+ years of experience in mobile app development (Android/iOS). I have already worked on similar apps with chat, payments, and real-time features. I can help with: * 1:1 chat and group chat * Audio/video calling and group calls * File and media sharing * Payment integration and referral system * Clean and responsive UI design * Fast and scalable app performance I will deliver clean, secure, and high-quality code within timeline. Thanks.