⬡ Backend Engineer // Systems Engineer

Harsh Bajaj

Building the infrastructure the internet runs on

~/harsh-bajaj $ whoami
Backend engineer with ~2 years experience designing distributed systems, APIs & data pipelines.
~/harsh-bajaj $ cat expertise.txt
Node.js · PostgreSQL · Redis · React.js · Express.js · REST APIs · GraphQL · Python · FastAPI
~/harsh-bajaj $ cat contact.txt
harshbajaj544@gmail.com · github.com/dexten32 · linkedin.com/in/harsh-bajajb
~/harsh-bajaj $ █
▶ View Projects → Get in Touch ↓ Resume.pdf
Scroll to explore
01 //

Experience

Apr 2025 — Apr 2026 1 yr
Cynox Security LLP
Web Developer — Full Stack & Systems
Architected and delivered a production-grade Task Management System by converting loosely defined stakeholder requirements into scalable backend services and APIs. Improved system throughput by ~2x through load testing, optimized database pooling, and asynchronous processing using Redis and BullMQ. Diagnosed malicious resource consumption to stabilize VPS infrastructure and redesigned PDF report generation workflows, reducing size by ~10x.
Node.js TypeScript Express.js MongoDB Prisma Redis BullMQ RBAC
Nov 2023 — Sep 2024 11 mo
North Delhi Public School
Software Engineer — Data & Web
Processed and structured institutional datasets using advanced Excel workflows to support student records management, administrative reporting, and data-driven insights. Developed and optimized PHP and WordPress workflows for inquiry collection, admissions management, and database synchronization.
WordPress PHP MySQL Excel HTML/CSS
// Technical Proficiency

Backend & Systems

Node.js TypeScript Express.js Python FastAPI REST APIs Redis & BullMQ PostgreSQL & MongoDB Prisma ORM

AI & NLP Engineering

Semantic Search Vector Embeddings ONNX Runtime TF-IDF Fallbacks Cosine Similarity Domain Weighting NLP Pipelines

Infrastructure & Scale

Docker Linux / Bash Nginx Reverse Proxy PM2 Process Manager Load Testing (k6) Asynchronous Processing VPS Stabilization

Security & Tools

JWT Auth Secure RBAC Rate Limiting Winston Logging Git / GitHub Postman API Testing Puppeteer Scraping
02 //

Projects

// 001 · Desktop Application
Advanced Resume ATS & Intelligence
AI-powered resume evaluation desktop and backend engine utilizing ONNX Runtime text embeddings (all-MiniLM-L6-v2) and inflation-resistant scoring weights (domain weighting & penalty engines to combat keyword stuffing). Load-tested with k6 to achieve sub-300ms p95 latency.
Python FastAPI ONNX NLP k6 PostgreSQL PyQt / CustomTkinter
600+req/sec
90%match accuracy
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// 002 · Desktop Application
Invoice Generator Pro
A high-fidelity desktop and web application with live real-time PDF previewing, multi-currency support, custom logo uploading, and automated tax calculations. Features pixel-perfect brutalist aesthetics with optimized one-click local file exports.
React Chakra UI Tailwind jsPDF Electron
LocalSave & Print
PDFExport
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// 003 · Web Application
Task Management System
A production-grade task management platform featuring modular backend architecture, JWT authentication, secure RBAC middleware, and optimized SQL schemas. Integrates Redis and BullMQ to run background tasks asynchronously, heavily improving concurrent throughput.
Node.js Express.js Prisma BullMQ Redis MySQL
200+API req/sec
50+active users
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03 //

Education

2025 — 2027 In Progress
Indira Gandhi National Open University (IGNOU)
Master of Computer Applications (MCA)
Advanced study of systems programming, algorithms, database models, cloud computing, and distributed networks.
2021 — 2025 Completed
Deshbandhu College, Delhi University
Bachelor of Science in Computer Science
Rigorous foundation in structural computing, database management, software engineering, OS kernels, and network architectures.
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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