Available for Full-Stack Roles & Freelance

I build full-stack web apps.

From database design & backend APIs to polished, responsive UIs—I own features end-to-end.

Apps Shipped

sub-300ms

P95 Latency

100%

DB → UI Ownership

Start Exploring Projects View Skill Tree Download Resume

Harsh Bajaj

Level 5 Full-Stack Engineer

2,450 XP · Quest Active

120+ questions solved

on LeetCode

fullstack-quest-cli v2.5

~/harsh-portfolio $ whoami

Full-stack developer building end-to-end web applications with React, TypeScript, Node.js, PostgreSQL, and cloud deployments.

~/harsh-portfolio $ cat stack.json

{ "frontend": ["React", "TypeScript", "Tailwind"], "backend": ["Node.js", "Express", "FastAPI"], "database": ["PostgreSQL", "MongoDB"] }

Level 2 Quest

Technical Skill Tree

Balanced mastery across frontend client architecture, backend server engineering, database design, and cloud deployments.

Frontend Architecture

Client UI & User Flows

Mastery MAX

React.js / Next.js TypeScript Tailwind CSS & CSS3 Responsive UX/UI State Management (Zustand) Component Architecture Chart.js & Visualization

Backend & API Systems

Server Logic & Middleware

Mastery MAX

Node.js & Express.js Python & FastAPI REST & GraphQL APIs JWT Auth & OAuth Redis & BullMQ Queues Secure RBAC Middleware API Testing & Postman

Database & Storage

Schema Design & Queries

Level 5

PostgreSQL MongoDB Prisma ORM MySQL Query Optimization Data Aggregation

DevOps & Cloud Deploy

Hosting & CI/CD Pipelines

Level 5

Docker Vercel & Netlify Render & Railway Linux & Bash Nginx & Reverse Proxy Git & GitHub Actions

Level 3 Quest

Full-Stack Project Showcase

Real-world applications built from schema definition and backend endpoints to polished interactive user interfaces.

FULL-STACK APP 100% End-to-End

Time Tracker

A full-stack time tracking app to log, analyze, and visualize time spent on projects and tasks.

Interactive Timer & Manual Log: Start/stop live stopwatch or submit manual time entries with project tags.
Analytics Dashboard: Visual daily, weekly, and monthly time breakdowns using interactive charts.
Project & Tag Categorization: Granular organization of tasks with custom tags and workspace grouping.
Authentication & Security: JWT user authentication with isolated user data schemas and CSV/PDF export.

React TypeScript Tailwind CSS Node.js Express PostgreSQL JWT Auth Electron

Code Repository

AI FULL-STACK APP Sub-300ms

Advanced Resume ATS & Intelligence

An end-to-end resume evaluation portal pairing an intuitive scoring dashboard with a high-performance vector NLP engine.

UI/UX Flow: Drag-and-drop resume upload, live keyword match breakdown, and visual score gauge dashboard.
Full Stack: React UI frontend, Python FastAPI server, ONNX embedding engine, and PostgreSQL storage.
Performance: Sub-300ms p95 latency under heavy k6 load testing with inflation-resistant penalty scoring.

React Python FastAPI ONNX NLP PostgreSQL Tailwind

GitHub

WEB & DESKTOP APP Live PDF Preview

Invoice Generator Pro

A full-stack client invoice generator featuring dynamic calculation flows, multi-currency support, and instant PDF rendering.

UI/UX Flow: Side-by-side live PDF preview, drag-and-drop logo builder, dynamic tax/discount calculations.
Full Stack: React frontend, Node/Electron backend, schema validation, local storage sync, jsPDF engine.

React Tailwind Node.js Electron jsPDF

GitHub

ENTERPRISE PLATFORM Redis & BullMQ

Task Management System

Production-grade task & team operations system featuring real-time task boards, async background workers, and RBAC security.

UI/UX Flow: Interactive task board, real-time status updates, team assignment workflow, and report downloads.
Full Stack: React frontend dashboard, Node/Express API server, Redis queue, BullMQ async workers, MySQL DB.

React Node.js Express Prisma ORM BullMQ Redis MySQL

Live App

Level 4 Quest

Unlocked Achievement Badges

Earned milestones reflecting engineering impact, full-stack velocity, and production-proven reliability.

Full-Stack Hero

Capable of owning features end-to-end from DB schema & API routes down to responsive UI components.

Unlocked

API Master

Architected high-throughput REST/GraphQL endpoints with sub-300ms p95 latency and Redis caching.

Unlocked

UI Champion

Crafted accessible, visually striking, user-friendly client interfaces with modern state management.

Unlocked

Open Source Contributor

Active open-source builder delivering clean modular repositories and documentation.

Unlocked

Database Architect

Designed normalized relational PostgreSQL schemas and MongoDB document stores with indexing.

Unlocked

Speed Demon

Optimized database pooling and PDF generation pipelines, delivering 10x throughput gains.

Unlocked

Level 5 Quest

Level-Up Experience Roadmap

Chronological record of production engineering roles and academic achievements.

May 2026 — Present Freelance

Self-Employed

Freelance Full-Stack Developer

Architected and delivered full-stack web applications, custom REST/GraphQL APIs, and responsive user interfaces for clients. Managed end-to-end development lifecycles, database design, and cloud deployments.

React.js Node.js TypeScript PostgreSQL Tailwind CSS Freelance Full-Stack

Apr 2025 — Apr 2026 1 yr & 1 mo

Cynox Security LLP

Web Developer — Full Stack & Systems

Architected and delivered production-grade web applications by bridging business requirements into scalable Node.js/TypeScript microservices and polished React frontends. Boosted API throughput by 2x via Redis caching & BullMQ async queues. Redesigned document processing workflows to reduce PDF payload sizes by 10x.

React.js Node.js TypeScript Express MongoDB Prisma ORM Redis

2025 — 2027 In Progress

Indira Gandhi National Open University (IGNOU)

Master of Computer Applications (MCA)

Advanced study of cloud architecture, distributed algorithms, software engineering principles, and enterprise database systems.

2021 — 2025 Completed

Deshbandhu College, Delhi University

Bachelor of Science in Computer Science

Rigorous core computer science education covering data structures & algorithms, operating systems, computer networks, and relational database systems.

Finish Line

Claim Your Reward: Get In Touch

Need a reliable full-stack developer to bring your web app idea to life? Send a message below!

Let's build something reliable.

Whether you need an end-to-end full-stack web app, custom REST/GraphQL APIs, or responsive user interface components, I'm ready to collaborate!

Direct Email

work.harshbajaj@gmail.com

GitHub Profile

github.com/Harsh-Bajajb

LinkedIn Network

linkedin.com/in/harsh--bajaj

LeetCode Profile

leetcode.com/u/I6CifPy1OT