Android App: Auth & Purchases

@eclairios

Hello, I understand you need a robust, new Android application featuring a seamless user authentication flow and engaging core content accessible via integrated Google Play Billing, with all purchases server-validated. Furthermore, I will implement timely, relevant push notifications using Firebase Cloud Messaging for effective user engagement and content delivery. My expertise covers the full spectrum of your requirements, ensuring a stable and policy-compliant application. 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

@kamran2012

Hello, I will deliver the full Android app — Firebase Auth module, Google Play Billing with consumable and subscription products, and FCM push notification integration — all in clean, well-commented Kotlin. For purchase validation, I will set up a lightweight server-side receipt verification endpoint so purchase tokens are validated against Google Play Developer API before unlocking content. This prevents tampered receipts and ensures subscription status stays accurate across sessions. Questions: 1) Do you have a backend already, or should I provision a small Cloud Functions setup for server-side validation? 2) Which auth methods do you want at launch — email/password, Google Sign-In, phone OTP, or all three? Looking forward to discussing further. Best regards, Kamran

@zeeshan5121472

Hi, I can build this Android app from the ground up with secure authentication, expandable paid content, Google Play Billing, server-side purchase validation, and Firebase push notifications. I would recommend Kotlin with Firebase Auth, Google Play Billing, FCM, and a lightweight backend endpoint for validating purchases and tracking notification delivery. You’ll receive clean source code, debug and signed release APKs, README, and Play Console-ready setup. I have experience with Android apps, payments, notifications, APIs, and production release workflows. Best regards, Zeeshan Ali

@Rajoriadares

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

@mahig47

Hello! As per your project post, you are looking to build a clean Android application from scratch with a strong focus on authentication, in app purchases, and push notification delivery. The goal is to have a production ready mobile app with secure login, Google Play Billing integration, and Firebase based messaging fully wired into both backend validation and user facing flows. My focus will be on developing a structured Android application using a scalable architecture that includes secure authentication via Firebase or OAuth, full Google Play Billing implementation for both consumable and subscription products with server side validation, and a push notification system powered by Firebase Cloud Messaging with proper token handling and topic based delivery. The app will also include clean onboarding, modular content structure, and a maintainable codebase prepared for future feature expansion. I specialize in building production grade Android applications with secure payment systems, authentication flows, and Firebase ecosystem integrations, ensuring clean architecture, maintainability, and smooth user experience across devices. Let’s connect to understand your content structure, subscription model, and notification strategy so we can design the system correctly from the start. Best regards, Nikita Gupta.

@UzeeTech

With a proven track record of developing top-notch mobile applications and over 7 years of experience in Android development, I'm highly qualified for your project. I have extensive experience with Android Studio, which is crucial for delivering readable, well-commented Kotlin or Java code - enhancing maintainability in the future. With a comprehensive understanding of Google Play Billing and Firebase Cloud Messaging, I will not only wire them up end-to-end but also ensure that the app meets the rigorous standards set by Google Play policies. In addition, my skillset extends to backend architecture which is essential for delivering a secure auth module on par with OAuth2 and Firebase Auth, which you've preferred. I've successfully built and deployed apps for various scales and industries, which are further enhanced by my skills in eCommerce solutions. Combining this with my latest knowledge on cross-platform development using Flutter and React Native brings the best of both worlds - one codebase, native experience at once deployed to both App Store and Google Play Store. Moreover, I believe in keeping clients informed at all times - relaying daily updates along with realistic timelines; hence prioritizing clear communication. My focus on writing clean documented and testable code ensures anyone can understand it. Lastly, my 98% adherence to project deadlines attests my commitment to time management.

@santoshkumars17

I, Santosh kumar, am a seasoned Mobile App Developer with an arsenal of skills you'll find invaluable for your project. As you require a full Android Studio project built from the ground up, I want to assure you that I've been in the game for over 5 years and have extensive experience, utilizing languages such as Kotlin and Java along the way. I'm confident that I can deliver your desired application with clean, well-commented code and following all current Google Play policies. Regarding specific functionalities, my expertise extends to implementing both Firebase Authentication and Google Play Billing, not to mention my competency in using Firebase Cloud Messaging for push notifications. I'm well-versed in developing secure auth modules (OAuth2 or Firebase Auth) and integrating Payment Gateways into mobile apps. You can trust me to deliver a product that not only meets but exceeds your expectations. Moreover, my attention to detail will ensure that your app runs smoothly on multiple devices. My diligence with testing on various platforms during development guarantees a stable experience post-deployment. Deadline-oriented with keen eye for strong communication,I assure you timely delivery with complete dedication and clear collaboration throughout the process. Let’s connect and construct something astounding together!

@mobasherreza10

As an experienced Android developer with a knack for crafting seamless user experiences, I believe I'm the perfect fit for your project. I possess a deep understanding of the Android ecosystem, which has granted me the expertise to build robust applications and integrate multiple essential features. My extensive experience extends to using OAuth2 or Firebase Auth for secure authentication, implementing Google Play Billing, and setting up Firebase Cloud Messaging for effective push notifications - precisely what you need. Moreover, my proficiency in Kotlin and Java—backed by years of practice—means that you can expect readable, well-commented code that is both maintainable and extensible. Additionally, my past use of various libraries aligns perfectly with your required tech stack - giving you peace of mind that every choice I make would be thoughtful and well-informed. To ensure your complete satisfaction, I commit to thorough testing across multiple devices before final sign-off as per your preference.

@TechWagger2026

As a seasoned Android developer with over 14 years of experience, I have a strong background in building apps precisely like the one you described. My portfolio is packed with over 400 successful projects, covering various industries and technologies. Whether it's crafting clean and efficient code in Kotlin/Java for improved readability or using Firebase Auth for seamless authentication, my approach always prioritizes the end-users' satisfaction while adhering to the Google Play policies. In regards to your app’s revenue process, trust me to handle the integration of Google Play Billing - from the test environment to the production environment ensuring foolproof end-to-end functionality. Being able to validate all purchase events on the server side will ensure optimal security and transparency throughout the process—a critical but often overlooked aspect in such projects. Moreover, my grasp on push notifications (Firebase Cloud Messaging specifically) guarantees swift, reliable message delivery and comprehensive topic or token management for an enhanced user experience. I value your time and will deliver not only a well-working app but also clear documentation explaining build steps, key replacements, and adjusting notification rules. Let's work together towards making an impactful digital product that meets your expectations and stands out in today’s competitive market!