Hire the Best BlackBerry App Development Specialists
in Bangladesh

Hi, I'm Al Fahad — a passionate Full Stack Developer with over 5 years of hands-on experience in mobile app development, cross-platform architecture, and smart software systems. I come from an engineering background, currently pursuing my BSc in Electronics and Communication Engineering at KUET, and I’ve turned my love for coding, electronics, and design into a full-time professional journey. 🧰🧰 You can directly check my portfolio items, they are all real life projects and the reviews of all the works are also attached with them. All the people were very satisfied. Take a look without a delay. During the pandemic, I dived deep into Data Structures and Algorithms, building a strong foundation in core computer science concepts and problem solving. Since then, I've worked on countless personal projects to sharpen my skills, then moved on to freelance platforms where I delivered quality solutions and earned great client reviews. ⚙️ What I Do I specialize in cross-platform development across mobile, web, and desktop — ensuring smooth, high-performance user experiences, scalable backends, and efficient system automation. Whether it's a business app, a startup prototype, or an embedded IoT system — I bring both technical depth and creative thinking to the table. 🧠 My Core Skills 🔹 Mobile & Frontend Development: Flutter, React Native, Jetpack Compose Win32 API, .NET, Custom UI systems 🔹 Backend Development: Node.js, Django, Flask Firebase, REST APIs, Websockets 🔹 System & Automation: Linux system administration (Ubuntu, Debian) Advanced scripting and automation in Python Bash scripting, DevOps fundamentals, Docker 🔹 UI/UX & Design: Figma, Penpot, Adobe Illustrator, Photoshop Clean, modern, and responsive interface design 🔹 IoT & Embedded Systems: Arduino, Raspberry Pi, ESP32 Microcontroller programming, sensor integration 🔹 Others: WordPress site development Web scraping, task automation, OpenWRT router customizations 🧰 Notable Projects ✅ Flutter based Event Management app with advanced UI/UX and API integrations ✅ Cross-platform Location Tracking app using React Native + Node.js + Firebase full stack ✅ Automation script in Python for scraping and data processing ✅ OpenWRT-based custom router system testbed development ✅ Branding and logo design for a martial arts company 🌟 Why Work With Me? ✅ Deep Technical Knowledge: I don't just "make it work" — I understand the how and why behind the code. ✅ Full Stack Confidence: I can build your entire system from frontend to backend to deployment. ✅ Passionate and Self-Motivated: I truly love what I do, and it shows in my work and dedication. ✅ Great Communication & Freelance Experience: You’ll find me reliable, easy to collaborate with, and open to feedback. ✅ Try Before You Hire: I’m confident in my skills — feel free to send a small task to test me before committing. 🎯 Let’s Build Something Great If you're looking for a reliable full stack engineer who can confidently deliver across mobile, web, desktop, and IoT — you’re in the right place. I’m open to both short- and long-term projects, and always excited to bring new ideas to life. Feel free to reach out — I’d love to learn about your project and see how I can help!

👋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.

I have been building for the mobile ecosystem for over five years. My journey began here on Upwork in 2020, where I established my foundation as a Top Rated developer. Since then, I have focused on refining my craft, moving from building simple interfaces to architecting complex, high-performance mobile systems for iOS and Android. I specialize in Flutter and Dart, with a deep emphasis on technical discipline and long-term maintainability. I don't just write code, I build apps that are organized, scalable, and easy to manage as they grow. What I bring to your project: Architectural Integrity: I am a firm believer in Clean Architecture and robust state management (using BLoC or Riverpod). I write modular, testable code that ensures your app remains stable long after the initial launch. Senior Technical Expertise: I have extensive experience implementing complex features, including GPS and location services, real-time data processing, and secure payment integrations. Native Integration: With a strong background in Swift and Kotlin, I can handle deep native integrations that standard cross-platform developers often struggle with. Reliability: Having spent years in this industry, I understand that clear communication and technical honesty are just as important as the code itself. If you are looking for a senior developer who values quality, architecture, and a focused approach to problem-solving, I would love to discuss how I can help bring your idea to life.

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.

5 years of experience working on native Android applications for high profile clients and businesses. 🚀 Over a decade honing Android apps for top-notch clients. ⭐ 100% Success Rate | 5-Star Reviews Only From concept to launch, and continuous upkeep of top-tier Android apps. My profile's experience mirrors my dependability. 🔍 Always updated with the latest design trends and coding standards; 🌟 Ensuring top-notch usability, performance, and aesthetics; 💨 Faster, superior products at great value; 🕰️ Flexible availability to meet your needs. A wealth of experience leading global dev teams. For instance, managing a 7-member team . ✅ Mobile Development Leader; ✅ Kotlin and Java Expert; ✅ Flutter Full Stack and FlutterFlow; ✅ Champion of Clean Code, DRY, and KISS principles; ✅ Rigorous unit and automated testing; 📖 Well-documented code; 🎨 UI/UX Best Practices; 🔗 Database Mastery: MySQL, SQLite, PostgreSQL, SQL Server, Firebase; 🌐 API Integration; 🛠️ Web Services Development. 🎨 Sketch Programming with Arduino; 🔧 Microcontroller Programming with ESP8266; 🖥️ Raspberry Pi Programming with Python. Skills encompass MySQL, SQLite, PostgreSQL, SQL Server, Firebase, Java, Kotlin, Android Studio, Android SDK, Android NDK, Device Owner, Sketch Programming, Play Store...