Hire the Best Rapid Application Development Freelancers
in Bangladesh

🏆 ✅ UPWORK TOP RATED PLUS FULL STACK DEVELOPER (MOBILE AND WEB)!! Hello, my name is Md Naim Chowdhury, an expert mobile app developer with 7+ years of experience in the industry. I am proficient in a range of technologies such as React Native, and Flutter, among others. Additionally, I am experienced in integrating third-party SDKs, APIs, working with cloud services, and ensuring the security of mobile apps. I take pride in delivering top-notch work on time and within budget. I am committed to providing exceptional customer service, listening to your needs, and collaborating with you to create the best possible mobile app solution for your business. I have a strong understanding of the latest mobile app development technologies and tools. My expertise lies in designing, developing, and deploying custom mobile applications that meet the unique requirements of clients across various industries. I am specialized in developing apps that are easy to use, visually appealing, and deliver exceptional user experiences. From concept to launch, I can help you turn your vision into a reality. If you are looking for an experienced mobile app developer who can help you bring your ideas to life, look no further. Let's work together to build an innovative mobile app that will set you apart from the competition.

Top Rated on Upwork - 97% Job Success, $50K+ earned, 1,200+ hours, 100+ projects delivered. Senior full-stack developer / Principal Software Engineer with 14+ years building production business software. Now focused on AI-integrated and automation-powered applications. Recent work: • AI/ML loan prediction system (FastAPI + Vue.js + PostgreSQL) for a finance client • Production CRM with AI-assisted workflows (NestJS, React, PostgreSQL, Docker) • Security hardening on a live API — closed SQL injection vectors flagged by OWASP ZAP • Media asset management platform with on-demand HLS video transcoding • Hierarchical Redis caching layer delivering ~100x performance improvement • Multi-tenant SaaS platforms, ERP modules, BI dashboards, and mobile apps (Ionic/Capacitor) Core stack: Python/FastAPI, Node.js/NestJS, Vue.js/React, PostgreSQL, Docker, AWS/GCP. I integrate LLMs (OpenAI, Claude, open-source models), build custom automation workflows beyond no-code (n8n, Python/Node services), and add AI features into existing applications. Comfortable with Laravel/PHP for legacy modernization. Beyond code, I bring architecture, technical leadership, and team experience — useful for founders who want a senior partner, not just a contractor. I'm a good fit if you need: • AI features added to your existing app (chat, classification, automation, analysis) • A new CRM, internal tool, dashboard, or SaaS platform built end-to-end • Custom automation that goes beyond no-code - real Python/Node services • A Laravel/PHP system modernized, refactored, or extended • A legacy system modernized, refactored, or migrated • A senior developer who can own backend, frontend, database, and deployment

𝐈 𝐛𝐮𝐢𝐥𝐝 𝐚𝐩𝐩𝐬 𝐭𝐡𝐚𝐭 𝐚𝐜𝐭𝐮𝐚𝐥𝐥𝐲 𝐠𝐞𝐭 𝐮𝐬𝐞𝐝 — 𝐧𝐨𝐭 𝐣𝐮𝐬𝐭 𝐥𝐚𝐮𝐧𝐜𝐡𝐞𝐝. 𝐈’𝐦 𝐚 𝐌𝐨𝐛𝐢𝐥𝐞 & 𝐖𝐞𝐛 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫 with a data-focused mindset, helping startups and businesses turn ideas into reliable products. Whether it’s a mobile app, a web platform, or backend systems, I focus on making things work smoothly in real-world conditions — not just in development. Over time, I’ve worked across different stacks and stages of products — 𝐟𝐫𝐨𝐦 𝐞𝐚𝐫𝐥𝐲 𝐌𝐕𝐏𝐬 𝐭𝐨 𝐬𝐜𝐚𝐥𝐢𝐧𝐠 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐮𝐬𝐞𝐝 𝐛𝐲 𝐫𝐞𝐚𝐥 𝐮𝐬𝐞𝐫𝐬. 💻 𝐖𝐡𝐚𝐭 𝐈 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡: • Mobile: Swift (iOS), Flutter • Web: MERN stack (MongoDB, Express, React, Node.js) • Backend & automation: Python, n8n • Data & databases: SQL, data analysis, reporting • Infrastructure: AWS, VPS, web hosting • Tools: Figma, Vercel, Netlify 🚀 𝐖𝐡𝐚𝐭 𝐲𝐨𝐮 𝐜𝐚𝐧 𝐞𝐱𝐩𝐞𝐜𝐭 𝐰𝐨𝐫𝐤𝐢𝐧𝐠 𝐰𝐢𝐭𝐡 𝐦𝐞: • I keep things clear and straightforward — no overcomplicated processes • I care about performance, structure, and long-term maintainability • I handle end-to-end development, so you don’t need to juggle multiple people • I communicate regularly, so you’re never left guessing 🛠️ 𝐌𝐨𝐬𝐭 𝐨𝐟 𝐦𝐲 𝐰𝐨𝐫𝐤 𝐫𝐞𝐯𝐨𝐥𝐯𝐞𝐬 𝐚𝐫𝐨𝐮𝐧𝐝: • Building mobile apps from scratch or improving existing ones • Developing full-stack web applications • Setting up backend systems and APIs • Automating workflows and integrations • Turning designs into clean, responsive interfaces • Helping make sense of data when needed If you already have something in progress or just an idea, that’s fine — I can jump in at any stage and help move it forward. 𝐒𝐞𝐧𝐝 𝐦𝐞 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐚𝐧𝐝 𝐥𝐞𝐭’𝐬 𝐭𝐚𝐥𝐤 𝐭𝐡𝐫𝐨𝐮𝐠𝐡 𝐢𝐭.

I am a results-driven Senior Software Engineer, Full-Stack Developer, and AI/ML Engineer dedicated to architecting, building, and deploying scalable digital solutions that drive business transformation. Operating at the intersection of robust backend engineering, advanced artificial intelligence, and modern user-centric interfaces, I help global enterprises, high-growth startups, and specialized brands convert complex concepts into production-ready software. With deep technical domain expertise across modern web architectures, native and cross-platform mobile ecosystems, and cloud automation, my core mission is to engineer high-performance systems designed for long-term scalability, exceptional user retention, and measurable business impact. Core Areas of Specialization 1. Full-Stack Web Application Engineering I build modular, secure, and lightning-fast web applications utilizing industry-standard frameworks and strict architectural patterns. My engineering approach ensures that applications are not only visually compelling but also highly performant under heavy traffic loads. Frontend Architecture: Developing sophisticated single-page applications (SPAs) and server-side rendered (SSR) platforms using React, React Router, Next.js, and highly optimized, clean Tailwind CSS structures. State & Data Management: Designing highly predictable state management flows, seamless RESTful API and GraphQL layers, and data-dense dashboards tailored for enterprise-level operations. Design Aesthetics: Strong emphasis on minimal, elegant, flat user interfaces, specializing in dark background layouts accented with gold or neon highlights for premium corporate branding. 2. Artificial Intelligence & Machine Learning Integration I specialize in bridging the gap between cutting-edge AI research and practical, revenue-generating commercial software. I build and integrate smart workflows, predictive data modeling, and intelligent automation systems that optimize operations. LLM & Generative AI Solutions: Designing context-aware AI tools, complex automation pipelines, and custom agentic frameworks (such as AI-driven management and diagnostic software tailored for specialized verticals like dental professionals). Predictive Analytics & Automation: Embedding tailored ML models directly into SaaS ecosystems to automate manual administrative burdens, predict user trends, and generate structured data insights. 3. Cross-Platform & Native Mobile Development I manage the entire mobile application lifecycle—from initial codebase architecture and native API integrations to secure testing workflows and successful deployments across public marketplaces. Production-Grade Deployments: Extensive experience managing updates, compliance, and screenshot optimization pipelines for premium mobile platforms like Apple App Store Connect and Google Play Developer Console. Proven Mobile Portfolio: Successfully engineered, managed, and optimized live commercial applications spanning specialized utility apps, transit mapping networks, transit logs, and productivity software—including projects such as TFL SERU, Madaripur Express, ShiftSpan, and TaskAI. 4. Enterprise SaaS, CRM, & ERP Architecture I design and develop comprehensive, data-secure enterprise platforms engineered to unify fragmented business processes. B2B Tools & Custom CRMs: Building multi-tenant Software-as-a-Service (SaaS) customer relationship tools featuring complex permission tiers, real-time webhooks, and secure user data management. Enterprise Resource Planning (ERP): Integrating and developing robust backend systems designed to synchronize logistics, track workforce management metrics, handle invoicing, and support data-heavy corporate compliance modules. 5. Technical SEO & Performance Optimization Beautiful software is only valuable if your audience can find it. I combine rigorous backend engineering with advanced search-engine visibility practices. Performance Engineering: Structuring clean, semantic codebases that achieve flawless Core Web Vitals scores, minimizing initial page load times, and designing highly crawlable technical SPA structures. Search Optimization Architecture: Implementing advanced schema markup, proper meta environments, and localized SEO technical layouts designed specifically to capture competitive enterprise markets in regions like the United States and the United Kingdom. Technical Toolkit & Ecosystem Expertise Languages & Core Tech: JavaScript, TypeScript, HTML5, CSS3, Modern ES6+, Node.js Frontend Frameworks: React, React Router, Next.js, Tailwind CSS. Backend & Serverless Infrastructure: Firebase (Authentication, Firestore, Cloud Functions), Supabase (PostgreSQL, Realtime, Edge Functions), Google Cloud Platform (GCP) Console. Mobile Frameworks & Developer Tools: Android Studio (SDK Configuration, Emulator Environments), iOS Xcode Environment, Play Store & App Store Developer Toolkits.

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!

8+ years I am working as a Software Engineer. I make useful solutions through comprehensive research and logical thinking to the project at my expertise area. I have experience in performance troubleshooting and fine-tuning of client-side system involving SQL queries analysis, analysis of PHP, C#, JavaScript, and C/C++ applications behavior. Good understanding of all software levels, from business requirements and project specifics to IO/memory/CPU usage of each application. My expertise fields are as follows: ⦿ Web Service Development ⦿ Web Application Development ⦿ API with requirement and Integration to system ⦿ Any third party system integration ⦿ Different types of frameworks - Laravel, Condigniter and Asp.net ⦿ Desktop Application based on C#(WPF, Winform) and Visual Basic ⦿ POS application for POS device in C/C++ and Android. ⦿ Working in Wordpress ⦿ Experience in creating mobile app in Android Studio and Xamarin ⦿ Quick learning of any new technology Currently, I am continuing my work on my expertise area. It's important to me to build long term relationships with clients, so I'm looking for long term projects. Thanks for viewing my profile and I look forward to hearing from you!