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Parixa

saas

A comprehensive examination platform built to handle large-scale online assessments with AI-powered proctoring, real-time monitoring, automated grading, and detailed analytics dashboards for educational institutions.

The Problem

Educational institutions struggled with secure, scalable online examinations. Existing solutions were either too expensive, lacked proctoring, or couldn't handle concurrent load during peak exam periods.

Tech Stack

Next.jsNode.jsPostgreSQLRedisAWSDockerWebSocket

Key Features

Real-time exam delivery engine
AI-powered proctoring
Automated grading system
Analytics dashboard
Multi-tenant architecture
Question bank management

Architecture

Next.js Frontend
Node.js API
WebSocket Server
PostgreSQL
Redis Cache
AWS S3
Frontend Backend Database External

Challenges

  • Handling thousands of concurrent exam sessions with real-time state sync
  • Implementing browser lockdown and anti-cheating measures
  • Building a reliable proctoring system with anomaly detection
  • Ensuring zero data loss during network interruptions

Results

5,000+

Concurrent Users

99.9%

Uptime

10,000+

Exams Conducted

Lessons Learned

  • Designed for failure — every component has a fallback
  • Real-time systems need careful state management
  • Load testing early saves production headaches
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