Engineering Case Studies

Problem

Manual campus vehicle monitoring left security gaps — no audit trail, no real-time detection, no spatial camera coverage analysis.

Architecture

Live Feed → YOLOv11 ALPR → LCS Geospatial Mapping → PostgreSQL Audit → Flask Web Dashboard

Key Engineering

• Custom-trained YOLOv11 ANPR model on Roboflow dataset
• LCS pairwise camera coverage analysis algorithm
• Geospatial campus map (Leaflet.js, extracted GPS points)
• Snapshot archiving with detection CSV log

Result

95%+ plate detection accuracy. 237KB main.py — largest single-file system in this portfolio.

Problem

Agricultural terrain monitoring requires real-time multi-sensor telemetry with obstacle detection and 6-axis orientation tracking over wireless links.

Architecture

ESP8266 FW → I2C MPU-6050 (IMU) + 4× HC-SR04 Ultrasonic → WebSocket → Mission Control Dashboard

Key Engineering

• 6-axis IMU orientation & motion tracking
• 4-sensor ultrasonic proximity array
• Real-time telemetry visualization (WebSocket)
• Autonomous hazard detection logic in firmware

Result

🥈 2nd Place — VIT TetherX 2026 National IoT Innovation Hackathon.

Problem

A portable payroll engine with zero runtime dependencies, verifiable security, and PDF payslip generation — no Node, no Python, no JVM.

Architecture

C++17 HTTP Server (httplib) → BCrypt Auth → SQLite → Static HTML/JS Dashboard → wkhtmltopdf PDF Engine

Key Engineering

• Full REST API in raw C++17, zero frameworks
• 3-tier RBAC: Admin / Manager / Employee
• BCrypt password hashing + bearer token auth
• PDF payslip gen + CSV bulk import + session audit

Why It Stands Out

One of the few student projects with a full REST API in systems-level C++17.

Problem

70M+ deaf individuals rely on interpreters for daily communication. A portable, real-time device that converts hand gestures to spoken audio addresses a critical accessibility gap.

Architecture

Webcam → MediaPipe Landmark Detection → Custom Gesture DB (SQLite) → gTTS / pyttsx3 → Speaker / Virtual Audio Device

Key Engineering

• 10+ named gesture presets + custom sign capture
• Dual TTS: gTTS (online) + pyttsx3 (offline fallback)
• Audio loopback routing to virtual microphone
• Debounced gesture detection, custom SQLite template DB

Result

Real-time ISL/ASL recognition with 26KB app.py — accessibility-focused AI.

Problem

Connected vehicle platforms needed a digital gatekeeper ensuring only legally compliant, insured commercial vehicles can operate.

Architecture

React + Vite Frontend → Express REST API (JWT middleware) → Supabase PostgreSQL (RLS policies) + Auth

Key Engineering

• 5-step authorization chain (existence → status → insurance)
• Row Level Security in PostgreSQL
• Admin / Captain RBAC with JWT middleware
• Full audit log on every authorization attempt

Result

Production-quality SaaS architecture with complete API documentation (15 endpoints).

Problem

Online code execution platforms lack real-time output streaming, proper sandboxing, and admin-side session observability.

Architecture

Flask Backend → Secure Executor → WebSocket Event Stream → Admin Live Monitor → Phase-Based Execution Model

Key Engineering

• Multi-language code execution with sandboxing
• Live output streaming over WebSocket
• Admin dashboard with live session monitoring
• Rate limiting, security layer, phase-based events

Scale

87KB Flask app with 34 source files and comprehensive test suite.

Problem

Universities lack integrated digital systems covering student applications, hostel allocation, fee management, and exam records under a single platform.

Architecture

Flask + SQLAlchemy → PostgreSQL → Jinja2 Templates → ReportLab PDF → Role-Based Dashboards

Key Engineering

• 3-tier RBAC: Student / Staff / Admin
• Hostel allocation and occupancy management
• Fee payment tracking + PDF receipt generation
• Multi-module reporting (course, hostel, payments)

Scale

181KB app.py — Smart India Hackathon submission with production-grade feature coverage.

Problem

SMEs lacked real-time visibility into stock transitions, leading to inventory discrepancies and operational bottlenecks.

Architecture

React Frontend → Node.js Express → Prisma ORM → PostgreSQL — deployed on Vercel

Key Features

• Dynamic stock sync with analytics dashboard
• Secure authentication system
• Real-time inventory updates

Result

Live on Vercel with zero-latency synchronization.

Problem

Manual attendance systems are vulnerable to proxies and produce unreliable reports — no audit trail, no automated enforcement.

Architecture

MERN Stack with institution-specific anti-proxy logic and automated report generation

Key Features

• Faculty report generation automation
• Anti-proxy detection protocols
• CSV export engine for records

Result

Handles concurrent data requests for 500+ users. Live on Render.

Problem

Volunteer organizations and volunteers lacked a unified platform for opportunity discovery, application management, and communication.

Architecture

Express MVC → MongoDB (mongoose) → bcryptjs Auth → EJS views → Session management with MongoDB store

Key Features

• Dual-role: Volunteer & Organization accounts
• Application system with approve/reject workflow
• Messaging system between roles
• Reviews & ratings per volunteer

Architecture Quality

Clean MVC structure: controllers / models / routes / middleware / views.