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Struggling with slow applications, unstable APIs, or scalability issues? Or looking for a developer who can take your product from development to deployment and maintenance? I’m Usmael Taju, a Full Stack Developer specializing in React.js, Node.js, PostgreSQL, MongoDB, and Flutter. I build production-ready web and mobile applications that are designed for performance, security, scalability, and long-term maintainability. ➡ Tech Stack: Frontend: React.js, Next.js, JavaScript, TypeScript, Redux, Zustand, Tailwind CSS, CSS, Material UI, Framer Motion, GSAP Backend: Node.js, Express.js, NestJS, REST API Development, Authentication & Authorization, Microservices, RabbitMQ Databases: PostgreSQL, MongoDB, MySQL, Supabase, Firebase, Redis Mobile: Flutter, Bloc, Riverpod, Provider — Cross-Platform iOS & Android Apps Payments: Stripe, PayPal, Payment Gateway Integrations Tools & DevOps: Git, Github, Postman, Docker, pnpm, Turborepo, CI/CD Deployment: AWS, Vercel, Railway, Heroku ➡ Services 1. Full Stack Web Development MERN & PERN stack development from MVPs to scalable production applications. SaaS platforms, admin dashboards, authentication systems, and modern web applications built from architecture to deployment. 2. Mobile App Development Flutter cross-platform mobile applications for iOS and Android with responsive UI, push notifications, and smooth user experience. 3. Modern Frontend Development React.js and TypeScript development with responsive layouts, interactive UI, modern animations, and performance-focused design optimized for all devices. 4. Backend & API Development Node.js and Express.js secure REST API development with JWT authentication, role-based authorization, WebSockets, and scalable backend architecture. 5. Database Development PostgreSQL, MongoDB, and Supabase database design with optimized queries, scalable architecture, migrations, and efficient data management. 6. Payment & Third-Party Integrations Stripe and PayPal payment gateway integration, subscription systems, CRM integrations, and external API integrations. ➡ Results: ✔ SaaS Platforms → MVPs, dashboards, authentication systems ✔ Mobile Apps → Flutter cross-platform applications ✔ E-commerce → Payment systems and inventory management ✔ Real-Time Apps → WebSocket chat and live notifications ✔ REST APIs → Secure and scalable backend services ➡ Why Hire Me? ✅ Versatile Full Stack Development - Web and mobile application solutions ✅ Clean & Scalable Code - Maintainable, documented, secure, and performance-focused development ✅ Security-Focused Development - Authentication, authorization, API security, and best practices ✅ Fast Delivery - Agile workflow, organized development process, and regular progress updates ✅ Clear Communication - Fluent English, responsive, and client-focused collaboration ✅ Problem-Solving Mindset - Focused on building reliable and business-oriented solutions ✅ Modern Development Stack - React.js, Node.js, PostgreSQL, MongoDB, and Flutter expertise 📩 Ready to start? Share your project idea for a clear development plan and timeline. Keywords: Full Stack Developer | PERN Developer | MERN Developer | React Developer | React.js Developer | Node.js Developer | Express.js Developer | PostgreSQL Developer | MongoDB Developer | JavaScript Developer | TypeScript Developer | Backend Developer | Frontend Developer | REST API Developer | Full Stack Web Developer | MERN Stack Developer | PERN Stack Developer | Flutter Developer | Mobile App Developer | Cross-Platform App Developer | SaaS Developer | Admin Dashboard Developer | Authentication System Developer | Web Application Developer | Responsive Web Developer | API Integration | Payment Gateway Integration | Stripe Integration | PayPal Integration | WebSocket Developer | Real-Time Application Developer | Redux Developer | Zustand Developer | Tailwind CSS Developer | Material UI Developer | Docker Developer | CI/CD | AWS Developer | Vercel Deployment | Supabase Developer | Firebase Developer | MySQL Developer | Redis Developer | Git | GitHub | Postman | Scalable Web Applications | Secure API Development.

I am a skilled full-stack developer with over 3 years of experience in mobile and web development, as well as database design. I have worked on innovative projects for startups and diverse teams, specializing in frontend, backend, database management, and machine learning. I am passionate about building scalable, efficient, and visually appealing applications, leveraging web automation and AI-driven solutions to solve complex challenges. 🔹 Technical Expertise: ✅ Mobile & Frontend Development: React Native | React.js | Nuxt.js | HTML | CSS | Tailwind CSS ✅ Backend Development: Node.js | Express.js | REST APIs | Flask ✅ Machine Learning: Python | TensorFlow ✅ Database Management: MySQL | PostgreSQL | MongoDB ✅ Programming Languages: Java | Python | C++ ✅ Web Automation: Efficient scripting for automated workflows 🚀 Why Work With Me? 🌟 Innovative Problem-Solving – Skilled in creating practical and effective solutions. 🔧 Scalable & Performant Code – Focused on efficiency and maintainability. 📱 Cross-Platform Expertise – Experience in both web and mobile app development. 🤝 Startup & Team Collaboration – Adapting to dynamic environments with ease. 💡 Passion for Cutting-Edge Tech – Always exploring the latest tools and frameworks. Let’s connect and build something amazing together! 🚀

Full-stack SaaS engineer specializing in scalable web platforms using Next.js, NestJS, Node.js, TypeScript, and PostgreSQL. I build modern business-critical systems including multi-tenant SaaS platforms, booking and reservation systems, admin dashboards, internal operational tools, and high-performance customer-facing applications. My focus is not just shipping features, I design systems that are maintainable, scalable, and production-ready from day one. I care deeply about clean architecture, security, performance, and long-term reliability. Over the years, I’ve worked on projects ranging from enterprise platforms and government systems to custom business automation tools and modern web applications. My experience includes: • Next.js / React applications with modern frontend architecture • NestJS and Node.js backend systems • PostgreSQL database design and optimization • Authentication & authorization (JWT, RBAC, multi-role systems) • REST APIs and real-time systems • Docker-based development and deployment workflows • Payment integrations and booking systems • Scalable admin dashboards and internal platforms I’m comfortable owning both frontend and backend architecture, collaborating with teams, and translating business requirements into clean technical solutions. I value clear communication, structured development processes, and delivering reliable software that solves real operational problems. Tech Stack: Next.js, React, NestJS, Node.js, TypeScript, PostgreSQL, Docker, Tailwind CSS, GraphQL, Redis, REST APIs, AWS

A passionate and detail-oriented Software Developer dedicated to building clean, functional, and scalable applications. Skilled at transforming ideas into reliable solutions that improve performance, usability, and overall business efficiency. 🛠️ Problems I Solve Optimizing websites for speed, performance, and responsiveness Fixing UI/UX issues, broken layouts, and front-end bugs Developing backend features that automate tasks and streamline workflows Cleaning, organizing, and refactoring codebases for better maintainability Building secure and scalable web applications Integrating APIs and connecting systems for seamless data flow Driven by continuous learning, I enhance my skills through real-world freelance projects and hands-on development work. I enjoy analyzing challenges, identifying root causes, and delivering high-quality solutions tailored to client needs. ✅ Why Work With Me? Strong commitment to deadlines and quality execution Clear communication with fast response times Problem-solving mindset with strong attention to detail Quickly adapts to new technologies and project requirements 🚀 Ready to bring clarity, efficiency, and clean engineering to your next project.

Feedback from Upwork Client ⭐⭐⭐⭐⭐ 5.00 "Liban demonstrated exceptional attention to detail and delivered the job on time. I highly appreciate his professionalism and dedication. " 👋🏼🙂Hi there! I am a full-stack developer (Backend-heavy) with 5 years of experience in Python (Django, FastAPI) and Node.js. Skilled in frontend frameworks like React and Next.js, I build scalable and efficient web applications. Expert in AI engineering, including RAG, agents, automation, and intelligent integrations. Proficient in scripting, system design, and end-to-end solution development. Passionate about merging full-stack engineering with cutting-edge AI innovation to create impactful products. Programming Languages: ✅ Python | Java | JavaScript | TypeScript Full Stack Development Expertise: ✅ Front End Development: React | Next | Redux | TypeScript | JavaScript | Tailwind CSS ✅ Back End Development: 𝘿𝙟𝙖𝙣𝙜𝙤, 𝙁𝙡𝙖𝙨𝙠, 𝙁𝙖𝙨𝙩𝘼𝙋𝙄, and 𝙀𝙭𝙥𝙧𝙚𝙨𝙨 ✅ Databases: MySQL | PostgreSQL | MongoDB ✅ Architecture: Clean Architecture | Model-View-Controller (MVC) Web Scraping Expertise: ✅ Selenium, Scrapy, Beautiful Soup Machine Learning & Data Science : ✅ Python, Scikit-learn, Pandas ✅ TensorFlow, PyTorch, Numpy ✅ Skilled in implementing neural networks, convolutional neural networks (CNNs), recurrent neural networks (RNNs), and other deep learning architectures ✅ Experience in natural language processing (NLP), and computer vision Why Me? ✔️ Timely and high-quality project delivery. ✔️ Strong emphasis on clean and maintainable code. ✔️ Effective communication and prompt responses. ✔️ Dedicated and hardworking approach for successful outcomes. ✔️ Passion for exploring new technologies and innovative solutions. ✔️ Expertise in a wide range of technologies. ✔️ Committed to providing value and ensuring client satisfaction. Thank you for taking the time to review my profile!

Need a custom software solution that helps your business run more efficiently? I develop reliable desktop and web applications that automate business processes, organize data, and improve productivity. Whether you need a new system built from scratch or want to improve an existing application, I focus on delivering secure, maintainable, and user-friendly software. I specialize in building business management systems for small and medium-sized businesses, including inventory management, pharmacy management, clinic management, project management, billing, reporting, and other database-driven applications. My Services • Custom Desktop Application Development (C#, VB.NET, Windows Forms) • Web Application Development (PHP, ASP.NET, HTML, CSS, Bootstrap, JavaScript) • Database Design & Development (MySQL, SQL Server, PostgreSQL, Microsoft Access) • Business Process Automation • CRUD Applications • Reporting & Dashboard Development • Bug Fixing & Performance Optimization • Database Design, Optimization & Maintenance • Existing System Enhancements Technologies Languages & Frameworks - PHP - C# - VB.NET - ASP.NET - JavaScript - HTML5 - CSS3 - Bootstrap Databases - MySQL - Microsoft SQL Server - PostgreSQL - Microsoft Access Projects I Have Built • Inventory Management System • Pharmacy Management System • Clinic Management System • Project Management System • Business Database Applications Why Work With Me? ✔ Clean, well-structured, and maintainable code ✔ Strong database design for scalable applications ✔ Solutions tailored to your business requirements ✔ Clear communication throughout the project ✔ Reliable, professional, and committed to meeting deadlines My goal is to build software that solves real business problems—not just write code. I take the time to understand your requirements and deliver solutions that are practical, efficient, and easy to use. If you're looking for a dependable developer to build a custom desktop application, web application, or database solution, I'd be happy to discuss your project and help bring your ideas to life.