Sagar P.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

💎🏅7+ years of experience💎🏅5-star service💎🏅Upwork verified💎🏅100% customer satisfaction ➤ Native app development using Kotlin/Java and Flutter. ➤ Skilled in Firebase, SQL, Facebook API, Google API, hybrid app development, Kotlin, C++, and Android. ➤ Knowledge of Android libraries and frameworks such as Jetpack Compose, RxJava and Dagger 2, Retrofit. ➤ Clean code using MVVM or MVP. ➤ Client-server using REST API via JSON. ➤ Familiarity with Git, GitHub, and good version control practices. ➤ Integration for Firebase services like Firestore, Realtime Database, Cloud Messaging, Crashalitycs, or custom events(useful for App store optimization). ➤ Material design in accordance with Google material guidelines. ➤ Proficient with Google Play developer console - production or open/closed testing publishing; ➤ Familiar with Google Play Privacy Policy (sometimes a simple disparity can lead to the app. rejection/suspension or even banned account). ➤ Experienced in working on chatting applications with XMPP connections. I have good experience in writing the unit test for better and speedy diagnosis and better development testing with following good java doc comments, which is very useful while working with a team and better documentation. I do have experience of SQL databases and NO-SQL databases and having used both client and server-side, so I better know the advantages/disadvantages and how to deal with the limitations. I have developed quality applications with CI/CD and automation build and publishing tools. I managed all the concerns about security, battery consumption, memory management, notification management in Chinese products. Most of my chat applications have implemented E2E Encryption with OMEMO for better privacy control for chat messages. Thanks, Sagar Poshiya ---------------------------------------------------------------------------------------------------------- Native Android App Development, Native iOS App Development, Flutter Cross-Platform App Development, App Development, Phone, Firebase, UI/UX Design, Prototype, RESTful API, In-app purchases, Location, Payment Gateway Integration, Apple Xcode, Android Studio, Push notifications, User authentication, User profile creation, Phone, API Development, API Integration, Front End Development, Back End Development, QA, Unit Testing, Regression Testing, Dating App Development, Ecommerce App Development, Ride Booking App Development, 3rd Party SDK Integration, Realm Database, SQLite, MySQL, Firebase Cloud Firestore, Firebase Realtime Database, Kotlin, Swift, Java, Dart, SwiftUI, Twilio API, Mapbox, HealthKit, Alamofire, Google Analytics, Amazon Web Services, Butter Knife, Core Data, UIKit, MapKit, XMPP.