Hire the Best BlackBerry App Development Specialists in Dhaka, BD

Senior Native Android Developer with 9+ years of experience building high-performance Kotlin applications. I specialize in Native Android App Development, Jetpack Compose, and clean MVVM architecture to build scalable, bug-free mobile apps Top Rated on Upwork with 100% Job Success across 48 projects • 9+ years building production Android apps. When clients hire me, it's usually for one of four reasons: - They need a new Native Android app built with Java or Kotlin. - Their existing app has become difficult to maintain, slow, or outdated and requires an app refactor. - They need AI features integrated into an existing mobile app like Gemini or ChatGPT. - They need someone who can take ownership of a complex mobile app codebase. High-Impact Wins: - 𝐒𝐜𝐚𝐥𝐞𝐝 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧 𝐀𝐧𝐝𝐫𝐨𝐢𝐝 𝐚𝐩𝐩𝐬 with 10M+ combined Google Play downloads, focusing on performance, maintainability, and long-term scalability. - 𝐌𝐨𝐝𝐞𝐫𝐧𝐢𝐳𝐞𝐝 𝐚 𝟏𝟓𝟎𝐊+ 𝐋𝐎𝐂 𝐉𝐚𝐯𝐚/𝐗𝐌𝐋 𝐜𝐨𝐝𝐞𝐛𝐚𝐬𝐞 (40+ screens) by migrating it to Jetpack Compose, MVVM, Hilt, Coroutines, and Flow for an app serving 1M+ users. - 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐞𝐝 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐦𝐨𝐛𝐢𝐥𝐞 𝐟𝐞𝐚𝐭𝐮𝐫𝐞𝐬 using LLM APIs, TensorFlow Lite, and MediaPipe, bringing intelligent capabilities directly into Android applications. - 𝐎𝐩𝐭𝐢𝐦𝐢𝐳𝐞𝐝 𝐚𝐩𝐩 𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐛𝐲 𝐫𝐞𝐝𝐮𝐜𝐢𝐧𝐠 𝐬𝐭𝐚𝐫𝐭𝐮𝐩 𝐭𝐢𝐦𝐞 by 15% using Baseline Profiles, Macrobenchmark, and Android performance profiling. - 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐝 𝐡𝐚𝐫𝐝𝐰𝐚𝐫𝐞-𝐜𝐨𝐧𝐧𝐞𝐜𝐭𝐞𝐝 𝐀𝐧𝐝𝐫𝐨𝐢𝐝 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐰𝐢𝐭𝐡 𝐁𝐋𝐄, RFID, and POS device integration, enabling seamless communication with external devices. - 𝐋𝐞𝐝 𝐌𝐨𝐛𝐢𝐥𝐞 𝐞𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐭𝐞𝐚𝐦𝐬, 𝐝𝐫𝐢𝐯𝐢𝐧𝐠 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 𝐝𝐞𝐜𝐢𝐬𝐢𝐨𝐧𝐬, code quality, feature delivery, and production releases for large-scale applications. 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 & 𝐂𝐫𝐨𝐬𝐬-𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦: Flutter is my second specialization alongside Native Android. I build production-ready Flutter applications, modernize existing codebases, implement complex features, and optimize apps for long-term scalability. My deep Android expertise allows me to handle advanced native integrations—including platform channels, custom plugins, third-party SDKs, BLE/hardware connectivity, AI/LLM features, and performance optimization—making me a strong choice for Flutter projects that go beyond standard app development. 💻 MY TECHNICAL STACK • Frameworks & Cross-Platform: Flutter, Jetpack Compose, SwiftUI • Programming Languages: Dart, Kotlin, Swift, Java • Asynchronous Programming & State Management: Bloc, Provider, Coroutines Android & Jetpack: Jetpack Compose, Compose Multiplatform (CMP), Kotlin Multiplatform (KMP), XML Views, Android SDK, Material Design 3, ViewModel, Navigation, Room, DataStore, Paging 3, WorkManager Architecture & Patterns: Clean Architecture, MVVM, MVI (Model-View-Intent), Modularization, SOLID, OOP Asynchronous & Reactive: Kotlin Coroutines, Flow, LiveData, Events AI / ML: TensorFlow Lite, On-Device ML, LLM & AI API Integration Dependency Injection: Hilt, Koin, Dagger Networking: Retrofit, Ktor, OkHttp, REST APIs, WebSockets DevOps & Testing: CI/CD, Jenkins, JUnit, MockK, Espresso Security: SSL Pinning, EncryptedSharedPreferences, ProGuard/R8 (Code Obfuscation), Secure Data Storage APIs & Tools: REST, GraphQL, Mapbox SDK, ExoPlayer, Git, Firebase (Crashlytics, FCM) , Baseline Profiles I’m looking for real engineering tasks and NOT VIBE CODING TASKS. If you need someone who can take ownership of your Android or Flutter app—from architecture and development to optimization and release - let’s talk.

Hey I'm Tasnuva Tavasum Oshin , Mobile Application Developer (Android+IOS) . I have been doing Mobile Application Development Since 2017 . I have offered more than 300+ Mobile Application in my career . I have developed Enterprise , E-Commerce , Service Based Mobile Application with best Architecture and Design .I'm Passionate About My Job and I have published 100+ Android App in Play Store and 40+ in Apple Store . From Development to Deployment I know Every Step Clearly & every project is a challenge for me . I give 100 percent effort for my apps development . I have clear vision & mission in this App Development Sector .I do Project Management for this I use scrum technology . I can complete the project within deadline by using project management tools like JIRA,Trello , CI-CD , Github , Gitlab etc . I have good communication skill too . For More you can check my GitHub profile username : TasnuvaOshin

Hi there! I’m an enthusiastic Flutter Developer with 5+ years of experience building high-quality iOS & Android apps. I bring a full-stack mindset, handling everything from UI design to backend APIs, server deployment, and app publishing. I specialize in: • Flutter & Dart – Cross-platform apps with clean architecture and performance optimization • Backend & APIs – Node.js / TypeScript / JavaScript for custom APIs and integrations • Databases – Firebase, Firestore, MongoDB, MySQL (real-time & relational) • App Deployment – Play Store & App Store releases, app signing, version updates • UI/UX Implementation – Modern, intuitive interfaces following Material & iOS guidelines • CI/CD & Automation – Streamlined pipelines for testing and deployment • Server & Cloud Management – VPS/Cloud maintenance, API hosting, SSL setups I take full ownership of projects, writing maintainable code and ensuring smooth delivery. Whether you need: • A new app from scratch • Existing app upgrades & enhancements • Backend systems integration I can help bring your product to life. Let’s connect and discuss how I can help turn your idea into a scalable, production-ready app.

I am a Senior Software Architect and Mobile Engineer with over 7 years of experience and a track record of 70+ successful project deployments. I specialize in building, scaling, and optimizing enterprise-grade mobile applications. My core focus is native and cross-platform mobile development, supported by deep expertise in full-stack infrastructure, high-performance networking, and modern AI integration. Whether you need to architect a complex application from scratch or optimize, polish, and extend an existing platform, I provide end-to-end technical execution. By leveraging multi-modular Clean Architecture, I ensure your codebase remains highly testable, maintainable, and scalable under massive user loads. Furthermore, I utilize AI-driven development workflows, including Cursor and GitHub Copilot, to accelerate development timelines. This allows me to rapidly audit legacy code, safely refactor, and deliver premium results significantly faster than traditional workflows while strictly maintaining code quality. Core Technical Expertise: 1. Mobile Architecture & UI: Native Android (Kotlin, Jetpack Compose), iOS, Flutter, and Kotlin Multiplatform Mobile (KMM). 2. Enterprise System Design: Multi-modular Clean Architecture, MVVM, MVI, and strict adherence to SOLID principles. 3. Full-Stack & Advanced Networking: End-to-end backend and responsive front-end development, integrated with high-performance gRPC communication and REST APIs. 4. AI Integration & Automation: Implementing LLMs, building custom intelligent workflows, and leveraging AI coding assistants for rapid iteration. 5. Niche Hardware/OS Capabilities: Custom AOSP ROM development and OS-level modifications for specialized enterprise devices. The Strategic Value I Bring: 1. Rapid Codebase Auditing & Optimization: I excel at diving into existing projects, identifying bottlenecks, and implementing immediate performance improvements without disrupting active users. 2. End-to-End Ownership: Because my skills span from the backend network layer (gRPC) to the mobile user interface, I can architect, build, and optimize your entire stack. 3. Consultative Approach: I operate as a strategic technical partner, prioritizing proactive communication, transparency, and precise alignment with your business goals. Please reach out to discuss your project requirements, and we can map out a robust technical strategy for your application.