EduFlow — E-Learning Platform

Problem context

Building a complete LMS requires handling multiple complex subsystems: video transcoding and adaptive streaming, real-time quiz engines, granular progress tracking (not just started/completed but percentage-based), role-based access control, and real-time collaborative features — all while keeping the UX simple for both instructors and students.

Implementation approach

Designed a React + TypeScript frontend with role-based dashboards: instructors get a drag-and-drop course builder with auto-save; students get a progress-focused learning view.

Implementation approach (2)

Built an Express.js API with JWT authentication, fine-grained RBAC middleware at the route level, and rate limiting to prevent abuse.

Outcome and delivery impact

The platform handles concurrent video streaming, quiz submissions, and real-time chat without performance degradation. MongoDB aggregation pipelines compute course completion percentages across nested structures in under 50ms.

Outcome and delivery impact (2)

The async video transcoding pipeline processes uploads without blocking the API — instructors can continue building courses while videos transcode in the background. Adaptive bitrate streaming serves content smoothly from 3G to fiber connections.

Reported metrics

• Progress Query Time
  Reported value: < 50ms
• Faster Course Creation
  Reported value: 60%
• Question Types
  Reported value: 4
• Collaboration
  Reported value: Real-time

Technologies involved

• React
  Open the technology archive to view related project work.
• TypeScript
  Open the technology archive to view related project work.
• Node.js
  Open the technology archive to view related project work.
• Express
  Open the technology archive to view related project work.
• MongoDB
  Open the technology archive to view related project work.
• Socket.IO
  Open the technology archive to view related project work.
• HLS
  Open the technology archive to view related project work.
• Tailwind CSS
  Open the technology archive to view related project work.