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Gwaz 9

@gwaz9

I build full-stack web applications with React, Express, and PostgreSQL—focused on reliable payments and data integrity.

India

Message

What I'm looking for

I want to join a team where I can build full-stack products with strong backend correctness—server-verified flows, reliable data modeling with PostgreSQL, and clean React UIs—while learning from engineers who care about edge cases.

I build full-stack web applications end to end, with React, Express, and PostgreSQL at the core. I’m especially drawn to problems where correctness matters—like slot scheduling, server-verified payments, and enforcing rules at the database level.

On DocDock, I implemented scratch-built appointment slot booking, preventing double bookings and handling cancellation edge cases. For payments, I integrate Razorpay with server-side verification, so I don’t rely on the frontend to confirm payment. I also designed role-separated user experiences and built a doctor dashboard that computes earnings and unique patient counts safely.

I also like projects that demand practical engineering: I built a session-protected Helmet Detection System using Streamlit, YOLOv5, and OpenCV, with confidence tuning and audit-ready snapshots. And through my Personal Database Management System, I used raw SQL and PL/pgSQL with triggers and views across multiple schemas to ensure business rules always run—no matter which app connects.

Experience

Work history, roles, and key accomplishments

Personal Database Management

Personal Project

Designed a PostgreSQL 16+ multi-schema personal finance and habit tracking database using raw SQL and PL/pgSQL. Enforced business rules with trigger functions (e.g., course status updates, finance validation, todo completion timestamps) and exposed reusable analytics via views.

PostgreSQL PL PgSQL Triggers Database Schema Design Views Aggregation Queries SQL Functions

DocDock Appointment Platform

Personal Project

Built DocDock, a multi-role healthcare appointment and payment platform with separate patient, doctor, and admin React experiences. Implemented 30-minute slot generation across 7 days with double-booking prevention, and verified Razorpay payments server-side before marking appointments as paid.

React Express Razorpay MongoDB Multer Cloudinary

Helmet Detection System

Personal Project

Developed a session-protected video inference tool that detects motorcycle riders without helmets using YOLOv5 and OpenCV. Tuned detection to a 0.92 confidence threshold, ran inference on every 3rd frame for responsiveness, and saved cropped violation snapshots for review.

YOLO V5 Streamlit OpenCV Express Confidence Threshold Tuning Tempfile Handling