Hire the Best BlackBerry App Development Specialists in Dhaka, BD

👋Hi, I’m Fazle Lohany Khan, With 5+ years of experience in mobile app development, I build high-performance, scalable, and user-friendly applications tailored to your needs. From telecom apps with 5M+ active users to healthcare, e-commerce, social media, school, finance, blogging, logistics and travel apps, I focus on creating solutions that drive growth and enhance user experience. What I Bring to the Table: ✅ Proven Success with e-commerce, social media, school management, finance, blogging, logistics, and travel apps ✅ Team Collaboration with skilled engineers from various countries ✅ Modern Development Practices using version control (Git) and issue tracking (Jira, Trello) for seamless teamwork ✅ Bug-Free Code is my top priority to ensure smooth app performance ✅ Scalable & High-Performance Apps built for growth and user engagement ✅ Expertise in Cross-Platform Development with Flutter (iOS & Android) ✅ Extensive Experience with third-party libraries like Firebase, Google Maps, Payment Gateways, Audio/Video Calling ✅ Clear & Effective Communication throughout the project lifecycle ✅ Focused on User-Centered Design to enhance user experience ✅ Code Optimization to ensure speed, efficiency, and maintainability ✅ Timely Delivery while maintaining high-quality standards ✅ Well-Documented Projects to make future updates seamless and easy If you're wondering whether I'm experienced with the features you need for your project, here's a (brief) list of key areas I've worked with: ✔ State Management: Bloc, Provider, GetX ✔ Maps, location, geocoding ✔ Login with Email, Google, Facebook, Apple, Phone number ✔ Camera, Gallery ✔ Audio, Video ✔ Charts ✔ Firebase, Firestore, Crashlytics, Analytics, Cloud Messaging ✔ Push notifications ✔ REST APIs, OAuth 2.0 ✔ QR codes ✔ Contacts ✔ Support and maintenance Your Vision, My Code — Building Future-Ready Mobile Apps with Trust and Excellence. Let’s build something amazing together! 🚀

Hi, I’m Saiful Alam Rifan — a Mobile Application Developer with 12+ years of building apps that actually work (and yes, I’ve seen things… like legacy code that should legally count as a crime scene). I specialize in turning ideas into polished, scalable, and user-friendly mobile experiences. Over the years, I’ve worked across industries that range from quiet and serious (banking, payment gateways) to loud and chaotic (ride sharing, food delivery, BLE contact tracing — the pandemic was… fun). What I Do I build mobile applications from the ground up, refine existing ones, and solve those “nobody knows why this is happening” bugs that every team eventually faces. I work closely with analysts, designers, and QA to make sure the final product feels smooth, reliable, and easy for real humans to use. My Experience Includes 1. EdTech apps that help people learn without falling asleep 2. Ride sharing and delivery apps that move things (and people) from A to B without drama 3. Telemedicine and video calling platforms that make distance irrelevant 4. FinTech solutions like agent banking, crypto wallets, and payment gateway integration 5. Complex Google Maps–based tracking and on-demand systems 6. Ticketing, booking, and other “please don’t crash when 10k users join at once” apps If it lives on a phone and needs to be fast, stable, and thoughtfully designed, I’ve probably built something like it. How I Work I take a straightforward, engineering-first approach: 1. Clean architecture, scalable design, and maintainable code 2. Clear communication (no disappearing acts) 3. Realistic timelines and honest expectations 4. A collaborative style where we solve problems together, not in silos 5. A calm, senior-level presence when things get complicated 6. Why Clients Enjoy Working With Me Because I treat every project like it matters — not like another ticket in a sprint. I’m here to make the product better, the process smoother, and your life easier. And yes, I write documentation. The useful kind. Let’s Work Together If you're looking for a senior mobile developer who brings technical depth, reliability, and a bit of personality, feel free to reach out. I’d be glad to learn about your project and help you build something that users will enjoy and that your team will be proud of.

Senior Android Developer specializing in Kotlin, Jetpack Compose, Flutter, and AI-powered mobile apps. Built Android apps with 10,00,000 Google Play downloads • 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 Android or Flutter app built correctly from the beginning. - Their existing app has become difficult to maintain, slow, or outdated. - They need AI features integrated into an existing mobile product. - They need someone who can take ownership of a complex mobile 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 • Local Storage & Security: Room Database, SQLite, Secure Storage (Privacy-First Apps) I’m looking for partners, not just 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.

I'm a Mobile Application Developer offering more than four years of experience building, integrating, testing and supporting apps using various front-end frameworks. I am looking for a challenge and an interesting project to work on. I will be happy to help you with: • Cross-platform mobile development for iOS & Android using Flutter/Dart • Design patterns (GET X,BLOC, Provider) • Native mobile development for Android using Java/Kotlin • Back-end development: Firebase Cloud Firestore, Firebase Storage,Graphql • App Store Submission (published more than 10 apps to Google Play/App Store.) • Creation of a project specification Looking forward to working with you to create high-quality products. Rizvy Ahmed.

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.

I bring 20 years of experience in Web and Mobile Application Development, with strong expertise in Java, Node.js, iOS, Android, and Appcelerator Titanium. I specialize in building robust, scalable, and high-performance applications across multiple platforms. ✅ Top Rated Developer ✅ Over 2,800 Hours Logged on Upwork ✅ 100% Job Success Score ✅ Excellent Client Feedback ✅ High Performer on Upwork Skill Tests Expertise in Programming Languages, Tools, and Technologies: - Appcelerator Titanium – 12+ years of experience - Android Development – 10+ years - Xcode / Objective-C – 10+ years - Swift – 7+ years - Flutter – 3 years - Node.js – 8+ years - Java – 18+ years - Spring Framework – 17+ years - Hibernate – 17+ years - MySQL – 17+ years (Advanced proficiency) - MongoDB – 5+ years (Basic knowledge) - JasperReports – 12+ years - Amazon Web Services (AWS) – 4+ years