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Build a full-featured voice chat application that runs smoothly on Android and ships with the complete source code. Core features to implement • Phone-number verification as the only login method, followed by secure session handling. • User profiles that can be expanded later (start with photo, name, bio, interests). • Public chat rooms with high-quality, low-latency voice. • One-to-one private voice calls plus real-time text messaging. • Push notifications for invites, messages, follow requests, wallet events, and admin broadcasts. • In-app wallet able to hold balances, process top-ups, and trigger withdrawal requests; history must be visible to the user and editable from the back office. • Web-based admin panel to manage users, rooms, transactions, and content reports. • Clean, modern UI that matches current Material Design guidelines. Technical expectations • Android Studio project written in Kotlin (Java is acceptable if you have strong reasons). • Scalable real-time backend (Firebase, Agora, WebRTC, or a proven alternative) with REST/GraphQL endpoints for non-RTC data. • Push via FCM or OneSignal. • Secure storage of media and profile assets on AWS S3, Firebase Storage, or a comparable solution. • Source code must be well-documented and delivered in a private Git repository at project hand-off. Deliverables 1. Signed APK for testing. 2. Production-ready APK. 3. Complete source code (mobile, backend, admin panel) with build instructions. 4. Brief deployment guide covering server setup, domain, SSL, and notification keys. 5. One-week bug-fix window after final delivery. Acceptance criteria • Phone verification works end-to-end using OTP. • Voice quality remains clear with <300 ms latency under normal 4G conditions. • No crash or memory leak after 1-hour stress test on mid-range devices. • Wallet balances remain consistent across concurrent sessions. • All features demonstrated on a live staging server prior to sign-off. That covers the scope; please keep the architecture modular so future social logins or extra profile customization can be added without rewriting core modules.
Project ID: 40551926
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143 freelancers are bidding on average $492 USD for this job

Hi there, Jas this side from Logictrix and I am ready to work on your app with my team and with a promise for long term support in fairly low cost. Please just give me your few minutes for the chat so that we can discuss all the important points about project as well as we can clarify any queries from both side to go ahead further for final agreement. We are expert in AI development and we used many AI platforms like openAI, Freepik, Antigravity, Cursor etc for App development and other AI work. We have developed around 400+ Android and iOS apps using Native and Flutter SDK in the past 15 years, Many apps are Live in Google play and App store. We will share our detailed portfolio over the Chat once we connect. Looking forward to your reply... Thanks and Regards Jas
$500 USD in 7 days
9.7
9.7

Hi, I can help with your "Android Voice Chat App - 01/07/2026 01:13 EDT" project. I build clean, maintainable PHP backends — core PHP and Laravel/Symfony, MySQL schema design, and well-structured REST APIs. For work involving php, java, mobile app development, android, kotlin, agora, android app development, webrtc, I pay close attention to validation, security, and readable code, delivering in small, testable milestones. You'll get clean commits and clear documentation. Could we discuss the specifics before I firm up the timeline? ⭐ 5.0/5 from a recent client: "Very Professional and On time delivery of the project" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
$600 USD in 12 days
8.0
8.0

Hello, I've reviewed your requirements and understand that you're looking to build a production-ready Android voice chat platform with a scalable backend, real-time communication, secure wallet functionality, and a comprehensive web-based admin panel. Android Mobile App Authentication ➜ Phone Number Login with OTP Verification ➜ Secure Session Management ➜ JWT Authentication & Token Refresh User Profiles ➜ Profile Photo ➜ Name & Bio ➜ Interests ➜ Future-Ready Profile Expansion Voice Communication ➜ Public Voice Chat Rooms ➜ High-Quality Low-Latency Audio ➜ One-to-One Private Voice Calls ➜ Real-Time Connection Management Messaging ➜ Private Text Chat ➜ Message Delivery Status ➜ Conversation History Wallet System ➜ Wallet Balance ➜ Top-Up Requests ➜ Withdrawal Requests ➜ Transaction History ➜ Real-Time Balance Updates Notifications ➜ Push Notifications (FCM/OneSignal) ➜ Voice Room Invites ➜ Messages ➜ Follow Requests ➜ Wallet Updates ➜ Admin Announcements Web Admin Panel User Management ➜ User Profiles ➜ Account Verification ➜ User Status Management Voice Room Management ➜ Create & Moderate Rooms ➜ Room Monitoring Wallet Management ➜ Top-Up Approval ➜ Withdrawal Management ➜ Transaction Monitoring ➜ Balance Adjustments Let's chat to discuss your preferred RTC provider, wallet workflow, moderation requirements, and backend infrastructure so we can build a robust, scalable voice chat platform that meets your performance and business goals. Thanks!
$320 USD in 7 days
8.2
8.2

Hello, I understand you want a full Android voice chat application with OTP login, user profiles, public voice rooms, private calls, chat, push notifications, wallet system, and a complete admin panel with scalable backend. The app will be built in Kotlin with a modern architecture using WebRTC, Agora, or Firebase based real time communication. It will support low latency voice, secure authentication, and smooth messaging with a clean Material Design UI. The system will include a secure backend, cloud storage, push notifications, and a modular structure so features like social login or advanced profiles can be added easily in future. I have recently built similar real time chat and voice applications with backend and admin panel and can deliver a stable, production ready system with clean architecture. Which real time technology do you prefer for voice chat WebRTC, Agora, or Firebase based solution? Review my projects and portfolio: https://www.freelancer.com/u/Hammadhassan21 Ready to begin right away ping me to connect. Kind Regards. Hammad Hassan
$350 USD in 10 days
7.9
7.9

Timeline and budget are just placeholders until we discuss the exact scope. We understand you’re building a production-grade Android voice chat platform, not just a prototype. The core challenge here is combining low-latency real-time voice, secure phone-based authentication, and a scalable backend that can also support wallets, messaging, and moderation without breaking performance or architecture over time. Our approach would be to build the Android app in Kotlin using a modular MVVM architecture, integrating a proven RTC solution like Agora or WebRTC for <300ms low-latency voice in both public rooms and private calls. Phone OTP authentication would be handled via Firebase Auth or a secure SMS gateway, with sessions managed server-side for reliability. For backend services (wallet, chat, profiles, admin), we’d implement a scalable REST API layer with proper database design and transaction safety to ensure wallet consistency across concurrent sessions. Push notifications would be handled via FCM, and media stored securely on AWS S3 or Firebase Storage. We’d also deliver a web-based admin panel for full system control, along with clean documentation, deployment setup, and both signed and production APK builds. Have you already decided between Agora and a WebRTC-based custom setup, or would you like us to recommend the best option based on cost and scale? Best regards, Redstone
$750 USD in 20 days
7.8
7.8

Hello, I have recently built a voice and video chat app and i can customize or built a new one for you as well. Your voice chat platform requires a modular architecture, and I can deliver a production-ready solution that is easy to extend with future features. You'll receive the complete source code, deployment documentation, production-ready builds, and post-delivery bug-fix support as requested. Best regards
$250 USD in 7 days
7.1
7.1

Your voice chat app will fail at scale if you hardcode Agora room limits without implementing dynamic channel sharding. Most developers miss this - when you hit 50+ concurrent users per room, latency spikes above 500ms and voice quality degrades. This kills retention. Quick question - are you planning regional deployment (US-only vs global), and what's your target concurrent user load in month 3? This determines whether we architect for Firebase Realtime Database or a custom Node.js backend with Redis pub/sub for session management. Here is the architectural approach: - KOTLIN + JETPACK COMPOSE: Build reactive UI with ViewModel architecture that survives configuration changes and prevents memory leaks during long voice sessions. - AGORA SDK + WEBRTC FALLBACK: Implement adaptive bitrate codec switching (OPUS) with automatic fallback to ensure sub-200ms latency even on 3G networks. - FIREBASE AUTH + TWILIO VERIFY: Handle phone OTP with rate limiting and fraud detection; store JWT tokens in EncryptedSharedPreferences to prevent session hijacking. - WALLET ARCHITECTURE: Design double-entry ledger system with PostgreSQL transactions and idempotency keys to prevent race conditions during concurrent top-ups. - FCM + ONESIGNAL: Set up topic-based push routing so admin broadcasts don't trigger 10K individual API calls. - AWS S3 + CLOUDFRONT CDN: Serve profile images through edge locations with signed URLs expiring in 1 hour to block unauthorized access. I've built 4 real-time communication platforms that scaled from beta to 100K+ users without architectural rewrites. Let's schedule a 20-minute technical call to walk through your infrastructure budget and compliance requirements before we lock the stack.
$450 USD in 10 days
6.7
6.7

Hello There!!! ★★★★ (I can develop a scalable Android voice chat app with OTP login, low-latency voice, wallet integration, and a complete admin panel.) ★★★★ I’ve carefully reviewed your project. You need a production-ready Android voice chat application with phone verification, public and private voice communication, messaging, wallet management, push notifications, and a scalable backend with full source code. ⚜ Android app development (Kotlin) ⚜ OTP authentication & user profiles ⚜ Agora/WebRTC voice integration ⚜ Real-time chat & notifications ⚜ Wallet & transaction management ⚜ Admin panel & backend APIs ⚜ Deployment, testing & documentation I have experience building real-time mobile applications with secure authentication, scalable backends, and cloud integrations. I'll use Kotlin with Agora/WebRTC, Firebase/FCM, and a modular backend architecture to ensure smooth performance, maintainability, and future expansion. Every module will be thoroughly tested, well documented, and delivered with deployment guidance and post-launch support. I'd love to discuss your roadmap and start planning the development milestones. Warm Regards, Farhin B.
$256 USD in 10 days
6.8
6.8

Hi sir, Thank you for giving opportunity for biding... we have gone through your requirements and we can build your Android Voice Chat App according to your exact requirements. Why You Need To Go With Us? And What Special you get with us. • Your vision = Our mission • Your idea + Our expertise = Winner on Web • Cutting edge web technology & design • Innovative, Cost effective & Customized service • Pragmatic Approach • Constant communication with clients • Consistent performance • On-time delivery • Maintenance of global quality standards • Your online business + Our experience = Your success Python, Data Analytics, Data Science, AI/ML, AI Automation, AI AGENT Portfolio IoT Data Analysis for Dairy Refrigerator Temperature Monitoring Real-time Object Detection using OpenCV and YOLO Supply Chain Management System Enterprise Data Warehouse Implementation Cloud Data Lake Migration Web Application Development for Wind Turbine Performance Prediction Data Analytics Platform for Supply Chain Optimization AI Bill System AI Try Dress
$250 USD in 7 days
6.7
6.7

Hello, I have thoroughly reviewed your requirements for the development of a full-featured voice chat application for Android. I will utilize my expertise in PHP, Mobile App Development, Android, and Kotlin to ensure the successful completion of this project. I plan to implement all the core features you have outlined, including phone-number verification, user profiles, public chat rooms, private voice calls, push notifications, in-app wallet functionality, and a web-based admin panel. I will ensure a clean and modern UI that adheres to Material Design guidelines. Throughout the project, I will maintain effective communication to keep you updated on the progress. You can view my portfolio https://www.freelancer.com/u/Curveballsol to see examples of my previous work in similar projects. Best regards, Curveball Solutions
$250 USD in 2 days
6.3
6.3

Hi, I am excited about building your Android voice chat app with all the core features you outlined. I have extensive experience developing scalable real-time communication apps using Firebase, Agora, and WebRTC, ensuring high-quality voice and low latency. My expertise in Kotlin and Java allows me to create clean, maintainable code aligned with Material Design. I am familiar with integrating phone verification via OTP, secure session handling, and implementing in-app wallets with transaction histories. I can develop the web-based admin panel to manage users, rooms, and transactions, and incorporate push notifications with FCM or OneSignal. I understand the importance of modular architecture to facilitate future updates like social logins or profile enhancements. I will ensure the app is well-documented, tested thoroughly, and delivered with complete build instructions and deployment guides. I am confident I can meet your requirements within your budget and timeframe, providing a robust, scalable solution that performs well on mid-range devices. Let’s discuss the project details further to tailor the solution perfectly to your needs. Best, Justin
$500 USD in 5 days
6.3
6.3

Hi, We went through your project description and it seems like our team is a great fit for this job. We are an expert team which have many years of experience on PHP, Java, Mobile App Development, Android, Kotlin, Agora, Android App Development, WebRTC Lets connect in chat so that We discuss further. Regards
$250 USD in 3 days
6.3
6.3

Having spent over a decade in the digital solutions space, my technical expertise aligns excellently with your project's requirements. Having worked extensively in Android Development, I'm comfortable in both Java or Kotlin and understand their advantages and disadvantages within the realm of your project. Furthermore, my proficiency extends to mobile backend development along with GraphQL, real-time databases, and push notifications using popular platforms like Firebase and OneSignal. In addition, my understanding of user authentication and session management can ensure secure phone-number verification as well as smooth handling of sessions. Lastly, my Full Stack background empowers me to not just develop mobile applications but also implement essential backend features such as an in-app wallet, REST/GraphQL endpoints, and the web-based admin panel you need. My proven ability to deliver complex projects on time while maintaining clean code practices showcases the disciplined approach I'll bring to your project. Let's collaborate and turn your vision into reality!
$500 USD in 7 days
6.4
6.4

Hi I will be able to help you. Please message me so that we will have detail technical discussion. I have 9+ years of combined experience in Mobile Application development, Website development, Desktop application development, 3rd party Artificial Intelligence api, AR/ VR, Chatbot, Blockchain- Cryptocurrency, CRM & ERP, Game Development and any other Software development. I am having expertise in Native on Android Java, kotlin and IOS Swift, and For Hybrid Cross platform on Flutter Dart & React- Native and for web and backend on react js and node js, Python Django and php CodeIgniter mvc and Laravel. Please consider me and initiate a chat for further detailed discussion. Regards, Anju
$400 USD in 14 days
6.6
6.6

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 10 days
6.7
6.7

I have read your job post and understand that you need a production-ready Android voice chat application with real-time communication, wallet functionality, and a complete admin panel. I have experience building scalable mobile applications with Kotlin, Firebase, WebRTC/Agora, REST APIs, and secure backend systems. I would develop the app with a modular architecture so future features like social logins, advanced profiles, or additional monetization can be added without major changes. The solution will include OTP phone authentication, public voice rooms, private voice calls, real-time messaging, wallet management, push notifications, a secure admin dashboard, and well-documented source code. I will thoroughly test voice performance, wallet consistency, and application stability before deployment, and provide complete setup and deployment documentation along with post-delivery bug support.
$500 USD in 20 days
6.1
6.1

Hi, I reviewed **Android Voice Chat App - 01/07/2026 01:13 EDT** and I'm confident I can deliver exactly what you're looking for. With hands-on experience in **PHP, Java, Mobile App Development, Android, Android App Development, WebRTC**, I build professional, scalable, and user-focused solutions that are designed for performance and growth. I believe in clear communication, quality work, and on-time delivery. I'd love to discuss your project and share ideas that can add even more value. View some of my previous work: Looking forward to hearing from you.
$600 USD in 14 days
5.8
5.8

Greetings, I have a clear understanding of the project requirements for developing a full-featured Android voice chat application. The core features include phone-number verification, user profiles, public chat rooms, private voice calls, push notifications, in-app wallet, and a web-based admin panel, all designed with a clean and modern UI following Material Design guidelines. My expertise in Android app development, Kotlin, and experience with Firebase, Agora, and WebRTC positions me as a strong fit for this project. You can view my portfolio here: ⭐⭐ https://www.freelancer.com/u/CodeAnchors ⭐⭐ My approach involves structured requirement confirmation, controlled planning, clean implementation, testing & validation checkpoints, and milestone-based transparency to ensure reliable execution and long-term results. Could you share your top priority or key business goal for this voice chat app project? Let's discuss further in an open chat to finalize the scope smoothly. Best regards, Muhammad Anas Khan
$250 USD in 4 days
5.8
5.8

Hello there, Building a voice chat app with seamless phone verification and superb voice quality under 300 ms latency is challenging but absolutely doable. Your need for scalable backend with React/GraphQL endpoints and an admin panel fits well with my expertise in Android app development and real-time communication. I've delivered complex Android apps featuring real-time messaging and secure user authentication. My approach: 1) Implement robust phone-number login and session management. 2) Integrate Agora for low-latency, high-quality voice and messaging. 3) Develop a modular, Material Design UI with a secure, scalable backend using Firebase and AWS. I propose to deliver the first milestone, a signed APK supporting phone verification and voice chat prototype, within two weeks. We can sync via a quick call or message to confirm specs. How do you envision scaling user load while maintaining ultra-low voice latency in public chat rooms? Thanks, Anatolie
$500 USD in 7 days
5.6
5.6

Hello, Your project is a great fit for my experience with Android development, real time communication, secure authentication, payment features, and admin systems. I have worked on applications where performance, reliability, and a smooth user experience were essential from the first release. I would love to discuss your requirements, review the complete workflow, and recommend the best approach for the mobile app, backend, and admin panel. I can also share relevant projects and explain how we can complete everything successfully. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira
$500 USD in 7 days
5.6
5.6

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