VidyaSethu – High-Concurrency EdTech Platform
High-concurrency digital learning and nationwide examination platform engineered to handle simultaneous test deliveries, asynchronous submission evaluations for 1M+ student records, sub-50ms question streaming, and AI-assisted anti-cheat telemetry.
Processing 1M+ Records Asynchronously
Engineered asynchronous submission evaluation pipelines using AWS SQS and Node.js worker threads, handling surges of tens of thousands of concurrent exam submissions without dropping a single payload.
Database Indexing & Redis Caching
Implemented Redis cache-aside layers for active exam sessions and optimized MongoDB aggregation pipelines, cutting backend latency by 40% under peak mock-test traffic.
Anti-Cheating & Session Verification
Built client focus tracking, IP verification, and encrypted heartbeat sync to maintain examination integrity across remote test-takers.
Instant Scorecard & Granular Analytics Engine
Built an automated reporting engine generating comprehensive subject-wise percentile curves, weak-topic heatmaps, and downloadable verified certificates. Optimized MongoDB compound aggregation indices to generate comprehensive class-wide rankings in seconds.
Asynchronous Evaluation Pipeline with AWS SQS & Worker Pools
Decoupled the assessment submission ingestion layer from the grading engine using AWS SQS FIFO queues and elastic Node.js worker pools. Test responses are immediately acknowledged with sub-50ms latency, queued for parallel grading, automated percentile computation, and scorecard generation, processing over 1,000,000+ records seamlessly during nationwide mock tests.
