
Sayhan Ahmed
Expert Full Stack Developer, React, Next js, Node js
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Full Stack Web Developer
Freelancer.com • Freelance
Dec 2024 - Present • 1 yr 10 mos
I operate as a professional Full Stack Web Developer specializing in the MERN Stack (MongoDB, Express.js, React.js, Node.js) and Next.js. I design, develop, and deploy scalable web applications that solve real-world business problems. My focus is on writing clean, maintainable code and delivering pixel-perfect, responsive user interfaces. ➤Key Projects & Responsibilities: 1. Health & Social Impact Platform (Project: Vein) ✔ Architected a full-stack blood donation platform using React 19 and Tailwind CSS. ✔ Implemented secure Role-Based Access Control using Firebase Authentication to protect user dashboards. ✔ Built high-performance RESTful APIs with Node.js and Express to handle donation tracking and payments. ✔ Optimized MongoDB database queries to enable real-time donor filtering and analytics. 2. E-Commerce & Marketplace Development (Project: Crafty) ✔ Architected a full-stack artisan marketplace using Next.js and Tailwind CSS. ✔ Implemented security using Firebase Authentication to protect user data and admin routes. ✔ Built high-performance RESTful APIs with Node.js and Express to handle complex CRUD operations for products and orders. ✔ Optimized MongoDB database queries to enable real-time product filtering and full-text search capabilities. 3. Fintech & Utility Solutions (Project: BillEase) ✔ Developed a digital bill management platform that streamlines monthly payments. ✔ Integrated automated workflows for generating dynamic PDF reports and payment summaries. ✔ Ensured 100% responsive design across mobile, tablet, and desktop devices using modern CSS frameworks. ➤Technical Stack Expertise: ✔ Frontend: React.js, Next.js, JavaScript (ES6+), HTML5, CSS3, Tailwind CSS, Responsive UI, Component Architecture, Context API, Custom Hooks, Performance Optimization ✔ Backend & API: REST APIs, Node.js, Express.js, Firebase Auth, MongoDB ✔ Developer Tools: Git, GitHub, npm, Vercel, Netlify, Firebase, VS Code ✔ Design Tools: Figma, Adobe Photoshop, Canva
Information Systems Intern
Dhaka University Library • Part time
Jun 2024 - Jul 2024 • 1 mo
Managed the administration of Open Source Integrated Library Systems (KOHA). Handled complex data entry workflows, digitized university resources, and ensured data integrity within the DULIS system.
Technical Intern
BANSDOC (Ministry of Science & Technology) • Part time
Feb 2024 - Mar 2024 • 1 mo
Assisted in the organization and digitization of national scientific documentation. Supported the technical team in information retrieval protocols and database management workflows.