👋 Hi, I’m Saad Hasan — Full Stack JavaScript Developer

I build distributed backends and full stack features that prioritize reliability, performance, and cost. Experience spans real time collaboration, search and ranking, job orchestration, notifications, and rate limiting, built with clarity, safety, and growth in mind.

🚀 Featured Projects

🎓 Learn with Sumit – Scalable LMS Platform

A complex learning management system used by 10,000+ students and generating 1 crore+ BDT revenue.

🔧 Key Contributions:

Built the platform using Next.js + Node.js, handling thousands of daily active users.
Integrated Stripe payments, SSO, and DRM-protected video streaming.
Developed watch-time tracking, quiz modules, CV generator, and real-time notifications.
Secured the app with JWT auth, RBAC, and MongoDB with encryption.

🧰 Tech Stack: Node.js, MongoDB, Cloudinary, Stripe, DRM, AWS S3, Next.js

📺 Video Streaming Platform (System Design Practice)

A microservices-based video platform built to explore system design and scalable backend architecture.

🧩 Features:

HLS streaming, chunked uploads, video transcoding with FFmpeg
Queue-based processing with BullMQ + Redis
S3-compatible object storage via MinIO
Fully containerized via Docker

🧰 Tech Stack: Node.js, Express, TypeScript, FFmpeg, BullMQ, Redis, MinIO, Docker

🌍 Open Source Contribution

🧩 React Bits – GitHub Issue #278

Contributed to improving an open-source resource for React patterns and anti-patterns. Helped report and diagnose a broken search UI for better developer experience.