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I’m creating an Android app that lets users register with email and password, then jump straight into one-to-one audio or video calls while chatting in real time. Inside the same conversation screen, users must be able to share files of various types and receive push notifications whenever a call, message, or file arrives—even if the app is closed. You’ll take the project from a clean Android Studio folder to a fully working APK. That includes handling user authentication, setting up the real-time media stack (WebRTC or another proven framework you prefer), wiring secure, low-latency text messaging, and integrating FCM for notifications. Everything has to run reliably on Android 8 through 14, respect battery-optimization rules, and recover gracefully from spotty 4G or Wi-Fi. Deliverables & acceptance criteria • Email/password sign-up, login, and password-reset flow, ready for production • Stable one-to-one audio and video calls with mute, camera-swap, and hang-up controls, connecting in under three seconds • Live text chat with read receipts and file attachments up to 50 MB • Push notifications for incoming calls, messages, and transfers • Source code in Kotlin, clearly commented, plus a README covering build, backend deployment, and testing steps • Crash-free APK confirmed on physical devices and emulators from API 26 to 34 I’ll supply basic UI mock-ups and branding assets; everything else—signaling server choice, media handling, and best-practice architecture—is yours to propose and implement. Looking forward to working with someone who’s shipped real-time communication apps before and can back it up with examples.
Project ID: 40719687
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Hello, I’m an Android developer experienced with Kotlin and Firebase, and I can build your real-time communication app with a clean, maintainable architecture. I can implement email/password authentication, real-time chat, file sharing, FCM push notifications, and one-to-one audio/video calling using a suitable proven solution. I’ll provide well-structured Kotlin source code, a clear README, and a working APK tested across the required Android versions. I’m also comfortable integrating APIs and handling connectivity and error cases. I’d be happy to discuss your UI mockups and proposed architecture before starting.
₹600 INR in 2 days
0.0
0.0
33 freelancers are bidding on average ₹10,591 INR for this job

Hello Sir, I have already worked on similar types of website and software development projects and I am confident that I can successfully handle your project. I am a full-time freelancer with **17+ years of experience** in web development, software development, automation, and API integrations. My expertise includes: * Android app development * ASP.NET C# web and software development * Python automation and web scraping (Amazon, Instagram, Facebook, Google Maps, LinkedIn, Telegram, and other custom scraping solutions) * JavaScript, jQuery, AJAX, Bootstrap, HTML5 * Microsoft SQL Server database development * Payment gateway integration * SMS, Email, Banking, Financial, and Insurance API integration * Custom automation bots and workflow automation software I focus on delivering **high-quality, scalable, and reliable solutions** with clean code and long-term support. Please contact me in private chat so we can discuss your requirements in detail. I can also show you a **demo of similar projects** I have completed. Looking forward to working with you. Thanks & Regards
₹1,500 INR in 5 days
5.7
5.7

Hello Client, Greeting of the day!!!! I read your job description. I can do this job with quality product. I am always available for your support. Thanks
₹50,000 INR in 20 days
6.7
6.7

Hi, I can build your Android real-time communication app with secure authentication, 1-to-1 audio/video calling, live chat, file sharing and reliable push notifications. I can handle: Email/password registration, login and password recovery WebRTC-based audio/video calling with mute, camera switch and hang-up Real-time chat with read receipts File sharing up to 50 MB FCM notifications for calls, messages and files Secure signaling/backend architecture Network recovery and battery optimization Android API 26–34 compatibility Kotlin source code with documentation and production APK I have experience with mobile apps, real-time communication, APIs and Firebase integrations. I’ll focus on stable performance, secure architecture and proper testing on physical devices and emulators. Ready to review your Android Studio project and start immediately.
₹1,050 INR in 7 days
5.4
5.4

With over six years of experience in software engineering, specifically in mobile app development, I can assure you that I have the skills and expertise you need for your Android Voice & Video Chat project. Moreover, my extensive knowledge in Kotlin, the language primarily used for Android development, gives me an edge when it comes to ensuring the code is clean, efficient, and easy to maintain even as the project scales. In terms of your project's requirements, I've got you covered. User authentication involving email/password sign-up and login, low-latency media streaming for audio/video calls, real-time texting with file attachments - I've done it all before. Additionally, my understanding of FCM will allow me to provide a seamless push notification experience for your users even when the app is closed. Throughout my career, I've constantly emphasized on a clean and well-commented codebase. For this reason, during our collaboration, you can expect a thoroughly documented source code in Kotlin along with a comprehensive README file that'll assist you in build and testing steps. Having worked with major platforms like AWS and Google Cloud, I am confident in efficiently hosting the final APK.
₹1,050 INR in 1 day
5.0
5.0

Hello, I can develop your Android real-time communication app in Kotlin with production-ready authentication, one-to-one audio/video calling, live chat, file sharing and FCM push notifications. I will take it from the Android Studio project through backend integration, testing and a working APK. The app will include email/password registration, login and password reset, with secure session handling. For calls, I would use WebRTC with a suitable signaling/backend setup to provide reliable low-latency audio and video, including mute, camera switching and hang-up controls. I will also implement real-time messaging with read receipts and file attachments up to 50 MB. FCM will handle notifications for incoming calls, messages and file transfers, including when the application is closed. Network interruptions, battery optimisation and reconnection will be handled so the app can recover properly on unstable 4G or Wi-Fi connections. Let's connect to discuss and start the work. Thanks Saurabh
₹2,000 INR in 7 days
4.7
4.7

I will develop your Android voice, video, and chat app in clean Kotlin using WebRTC, real-time messaging, and high-priority FCM foreground services for instant incoming call alerts. You will receive a crash-free APK tested across API 26 to 34 alongside clean, commented source code and complete setup documentation. Regards, Nikhil Chandra Roy
₹600 INR in 1 day
3.1
3.1

Hi, I can build this Android communication app in Kotlin from the Android Studio project through a tested APK, with the architecture designed for reliable real-time messaging, calls, file sharing, and push notifications. My recommended stack is Kotlin + ZegoCloud for one-to-one audio/video, a Node.js backend with WebSocket signaling for real-time communication, and Firebase Cloud Messaging for notifications. Files can be stored securely with controlled access and 50 MB upload validation. Implementation plan: • Email/password registration, login, password reset and secure session management • Real-time one-to-one chat with delivery/read receipts • Zegocloyd audio/video calling with mute, camera switching and hang-up • WebSocket-based call signaling with proper connection/reconnection handling • File attachments up to 50 MB with upload/download progress and validation • FCM notifications for calls, messages and files, including background/closed-app handling • Network recovery for unstable Wi-Fi/4G and lifecycle handling • Android 8–14 compatibility and battery-conscious background behavior • Secure API authentication, authorization and encrypted transport • Kotlin architecture using clean separation between UI, networking, real-time services and data • Physical-device and emulator testing across API 26–34 • Complete source code, README, backend deployment and APK delivery
₹1,050 INR in 7 days
2.3
2.3

Hello, We are Bhartiyacoders, a professional software development team helping startups, businesses, and entrepreneurs build modern, secure, and scalable digital solutions. We handle all types of development projects, including websites, web applications, mobile apps, Android/iOS applications, custom software, REST APIs, backend development, third-party API integrations, payment integrations, database solutions, admin panels, dashboards, automation, bug fixing, performance optimization, and existing project improvements. Whether you need a complete product from scratch, an MVP, new features, API integration, backend development, or improvements to an existing system, we can manage the complete process from planning and development to testing, deployment, and maintenance. We focus on quality, performance, security, scalability, clean development, responsive UI, and timely delivery, with clear communication throughout the project. Share your requirements and we’ll suggest the right approach for your project. Let’s build something reliable and successful together. Best Regards, Bhartiyacoders
₹15,000 INR in 7 days
2.4
2.4

Hello, I understand you need a fully working Android voice/video chat app with email authentication, one-to-one calls, real-time messaging, file sharing and FCM notifications. The goal is a reliable Kotlin app that works smoothly from Android 8–14, including poor network conditions and background states. Here’s what I can provide: • Build Kotlin Android authentication with signup, login and password reset • Implement WebRTC-based audio/video calls with mute, camera switch, hang-up and fast connection • Develop real-time chat, read receipts, 50 MB file sharing, FCM notifications and reliable reconnection I bring over 4+ years of experience in full-stack development with JavaScript/TypeScript, React, Node.js, Django, REST APIs, databases and cloud services. I can also design the signaling/backend architecture and provide clean source code, README, testing and production-ready APK. Just to clarify a few things: • Do you already have a preferred backend/signaling stack, or should I propose the architecture? • Which storage/authentication provider do you prefer for user accounts and 50 MB file attachments? Please come to the chat box to discuss more about your project. Best regards Indresh Kushwaha
₹2,050 INR in 7 days
1.8
1.8

Hi, I’m a senior Full Stack AI Developer with 12+ years of experience in Python, FastAPI, LLMs, RAG, AI agents, and scalable full-stack systems. I’m comfortable joining client meetings, gathering requirements, explaining technical solutions clearly, and acting as the communication bridge between clients and engineering teams. I can contribute to AI architecture, RAG pipelines, agent workflows, API development, cloud integrations, code reviews, and production-ready implementations. I communicate confidently in English and can work effectively with international clients and technical teams. I’m available for long-term collaboration and can provide my CV and 1–2 minute introduction video.
₹1,050 INR in 7 days
1.0
1.0

I can build your Android voice & video chat app from scratch using **Kotlin, WebRTC, and FCM**. I’ll handle secure authentication, real-time voice/video calls, messaging, notifications, and reliable performance across 4G/Wi-Fi. The app will be battery-efficient, thoroughly tested on **Android API 26–34**, and optimized for both emulators and physical devices. You’ll also receive clean, well-documented code with clear build and deployment instructions. Let’s build a stable, production-ready communication app tailored to your requirements.
₹1,050 INR in 7 days
0.6
0.6

Hi there, I am an experienced Android Architecture and Native Mobile Developer specializing in real-time communication systems, WebRTC media streaming, and secure backend integrations. I have carefully reviewed your requirements for the Android Voice & Video Chat application. Here is how I will approach your core technical stack: Real-Time Media Stack: Implementing robust WebRTC peer-to-peer audio and video streaming with a reliable signaling server (WebSocket/Node.js) to ensure connections establish in under three seconds with camera-swap, mute, and hang-up controls. Secure Messaging & File Sharing: Building low-latency live text chat with read receipts and secure file attachments (up to 50 MB) using clean local caching and cloud storage. FCM & Background Reliability: Integrating Firebase Cloud Messaging (FCM) with high-priority push notifications for incoming calls and messages, ensuring the app handles battery-optimization rules gracefully and recovers smoothly from spotty networks. Clean Architecture & Delivery: Delivering production-ready, well-commented Kotlin source code following modern architecture guidelines, fully tested across API levels 26 to 34 (Android 8 through 14), along with a clear README setup guide. I have hands-on experience building real-time communication and video-streaming features for mobile applications. I am ready to start immediately and ensure transparent, high-quality execution. Best regards, Jamshidbek Alimov
₹6,000 INR in 7 days
0.0
0.0

Hello, As a seasoned Full Stack & Flutter Developer with over 7 years of experience, I can assure you that I am well-equipped to handle your Android Voice & Video Chat project. I've had extensive exposure to both Android and Backend Development, working with APIs, integrating AI services, and creating comprehensive applications. My proficiency in Kotlin will undoubtedly lend itself well into ensuring your project is both reliable and functional across multiple versions of Android. In terms of my track record with real-time communication applications, I have built numerous apps featuring similar functionalities to what your project requires - user authentication, real-time media handling (with WebRTC and other proven frameworks), low-latency text messaging, and integrations with push notification systems like FCM. With each project, I've strived to adhere to industry best practices while maintaining optimal performance, even under challenging network conditions. Additionally, my full stack skills make me adaptable to handling more than just the frontend interface. From building dependable backend systems to debugging and improving performance, I ensure that your product works harmoniously as a complete system. I look forward to bringing this versatile skill set into propelling your Android app from a clean folder in Android Studio to a fully functional APK that meets all your described deliverables and acceptance criteria! Thanks!
₹1,165 INR in 3 days
0.0
0.0

Hi, I’m a Flutter Mobile App Developer with 1.5+ years of professional experience building Android and iOS applications. I understand that you need an Equipment Maintenance App with: • Scheduled maintenance reminders • Equipment usage tracking • Breakdown management • Asset registration by location • Notifications • Clean and user-friendly UI I can develop this application in Flutter with a scalable structure and proper API integration. I also have experience with Firebase, push notifications (FCM), REST APIs, authentication, and database integration. I can handle the complete mobile development process, including UI, API integration, testing, bug fixing, and deployment support. I’m ready to start immediately and would be happy to discuss the requirements and workflow before development. Thank you, Shubham
₹1,050 INR in 7 days
0.0
0.0

I am very excited about your Android Voice and Video Chat App project. I have a strong foundation in Java and Kotlin, and I am keen to work with WebRTC and build a high-quality, real-time communication platform. I will ensure the app runs smoothly across Android 8 to 14, efficiently handles battery usage, and delivers a reliable experience, even on unstable connections. I am fully dedicated to understanding the requirements and delivering a crash-free APK on time.
₹1,050 INR in 7 days
0.0
0.0

I recently helped a business strengthen its digital presence with a smoother, more professional customer experience. I can help you create a robust Android app that enables seamless one-to-one audio and video calls, ensuring users enjoy real-time chatting and file sharing. My expertise includes user authentication, real-time media stacks like WebRTC, and FCM for push notifications, all while maintaining reliability across Android versions 8 to 14. I understand the importance of delivering a crash-free APK that meets your detailed requirements, including a polished user experience and efficient performance even on varied networks. I offer web and app development, focusing on quality work, clear communication, and thoughtful detail. I’d be happy to hear about your project and discuss how I can help. Feel free to send me a message anytime. Regards, Kaiden010.
₹1,150 INR in 7 days
0.0
0.0

Hi, I’m a Frontend & Mobile App Developer with experience in **ReactJS, Kotlin, and Jetpack Compose**. I can build a clean, responsive, and user-friendly solution based on your requirements. I’ll focus on delivering **high-quality UI, smooth performance, responsive design, and clean code**, while ensuring the project is completed on time. I’m ready to start immediately and would be happy to discuss your requirements and project details. Looking forward to working with you!
₹10,000 INR in 12 days
0.0
0.0

As an experienced Senior Full-Stack & App Developer, I am confident that I can bring your project 'Android Voice & Video Chat' to life. My expertise spans from developing scalable web and mobile applications, and I'm particularly adept at creating robust backend API systems just like you've described. I have deep knowledge in Android Development with strong skills in Java and Kotlin - ideal for this task. Moreover, I understand the complexities involved in building a real-time app that needs to perform consistently well across different devices and network conditions. Over years, I have successfully developed applications similar to yours, incorporating smooth mechanisms for pushing calls and notifications even when the app is closed. On top of that, my familiarity with WebRTC and other proven frameworks ensures you'll have a media stack --- the heart of your application --- that is reliable, low-latency and serves your needs perfectly. Another major advantage of working with me is my ability to provide comprehensive end-to-end support. From UI design to backend development through to deployment, you can count on me to navigate your project from idea to launch ensuring everything is in top operational order right up until the full APK delivery. Finally, with attention to detail, clean coding practices and careful testing on diverse devices, I will ensure a crash-free experience on Android devices from API 26 all the way through to 34. Let's collaborate and get it done!
₹1,050 INR in 7 days
0.0
0.0

Hi there, No Advance needed and I am Available for full time 8 Hours Per Days and 40+ Hours Per Week. I have 5+ years of Full Stack and Android development experience with Kotlin, Java, PHP, Laravel, Node.js, REST APIs, MySQL and MongoDB. I can develop your Android communication app from the clean Android Studio project to a fully working and tested APK. I can build secure email/password registration, login and password reset, along with one-to-one audio and video calling using WebRTC and a reliable signaling backend. The calling experience will include mute, camera switching and hang-up controls with fast connection setup and proper handling of unstable network conditions. I can implement real-time chat with read receipts, secure file attachments up to 50 MB and Firebase Cloud Messaging for incoming call, message and file notifications, including when the app is closed. I will also handle Android background restrictions, battery optimization and reconnection logic for unreliable 4G and Wi-Fi. The application will be written in clean, maintainable Kotlin with proper architecture, security, error handling and performance optimization. I will test across Android API 26 to 34 using physical devices and emulators and provide the complete source code, APK and detailed README for build, backend deployment and testing. I can share relevant real-time communication examples during our discussion. Let’s connect to discuss and start the work. Thanks Abhishek
₹600 INR in 3 days
0.0
0.0

Greetings I understand you need a robust Android app for one-to-one audio and video calls, which we have successfully completed in similar projects. Your goals of seamless user authentication, real-time media handling, and reliable push notifications align perfectly with our expertise. We will ensure the app is optimized for performance, battery usage, and connectivity, making for a smooth user experience across all supported Android versions. I bring extensive experience in developing real-time communication applications, utilizing frameworks like WebRTC and implementing Firebase Cloud Messaging for notifications. My commitment to quality and attention to detail ensures that every aspect of your project will be handled professionally. I’d love to chat about your project and suggest a follow-up discussion to explore how we can bring your vision to life. Regards, Nabeel Ismail
₹650 INR in 7 days
0.0
0.0

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