⬡ Backend Engineer // Systems Engineer

Harsh Bajaj

Building the infrastructure the internet runs on

~/harsh-bajaj $ whoami
Backend engineer with ~2 years designing
distributed systems, APIs & data pipelines.
~/harsh-bajaj $ cat expertise.txt
Node.js · PostgreSQL · Redis · React.js
Express.js · RestAPI · GraphQL · GitHub · Python
~/harsh-bajaj $ cat expertise.txt
~2 years of proven expertise in API development, database management, and full-stack development.
~/harsh-bajaj $ █
▶ View Projects → Get in Touch ↓ Resume.pdf
Scroll to explore
01 //

Experience

Apr 2025 — Present Present
Cynox Security LLP
Web Developer — Full Stack & Systems
Streamlined task tracking across teams by developing an internal Task Management System, supporting 200+ concurrent API requests through asynchronous job processing. Implemented secure RBAC, audit logging, and approval workflows. Rebuilt the company website to improve usability and client engagement.
Node.js TypeScript Express.js MongoDB Prisma RBAC
Nov 2023 — Sep 2024 11 mo
North Delhi Public School
Software Engineer — Data & Web
Managed institutional datasets using Excel for cleaning and structuring student records. Supported website development using WordPress and PHP for enquiry and data collection workflows. Utilized SQL for web and data workflow optimizations.
WordPress PHP MySQL Excel HTML/CSS
// Technical Proficiency

Backend & Systems

Node.js TypeScript Express.js FastAPI REST API Auth (JWT/RBAC) Middleware Architecture

Databases & Modeling

PostgreSQL MongoDB MySQL Redis Prisma ORM Query Optimization

Security & Engineering

Secure Backend Logging (Winston) Error Handling Input Validation System Design

Interfacing & Tools

React.js Tailwind Git/GitHub Postman Linux Basics Docker
02 //

Projects

// 001
Task Management System
A backend-centric platform built with Node.js and Express.js, featuring distributed background job processing using BullMQ and Redis for high-concurrency task handling. Implements JWT-based RBAC authentication and scalable MySQL/Prisma data modeling.
Node.js Express.js Prisma BullMQ Redis
200+API req/sec
50+active users
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// 002
Invoice Generator Pro
A high-fidelity React application with live preview, logo support, and automatic GST/VAT calculations. Built for professional speed with one-click PDF export and pixel-perfect HSL design.
React Chakra UI Tailwind jsPDF
LivePreview
PDFExport
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// 003
Advanced Resume ATS & Intelligence
AI-powered resume engine that improved matchmaking scores from 40% to 70% using TF-IDF semantic analysis. Load-tested with k6 to achieve 600+ requests/sec with p95 latency under 300ms for high-volume recruitment pipelines.
Python FastAPI TF-IDF k6 PostgreSQL
600+req/sec
90%match accuracy
↗
Let's build
something reliable.

Whether you need a scalable backend, a secure API, or high-concurrency systems. I'm ready to collaborate. Available for full-time and project-based opportunities.

✉ harshbajaj544@gmail.com → ⌥ github.com/dexten32 → ⚡ linkedin.com/in/harsh-bajajb →
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