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I build SaaS productsand AI-powered applications.

Full-Stack & AI Engineer

I help startups and businesses turn ideas into production-ready software — from full-stack web applications and backend systems to AI agents and workflow automation.

AI AgentsLLM AppsRAG SystemsWorkflow AutomationReactNext.jsNode.jsFastAPITypeScriptPostgreSQLDockerAWS
Applications delivered
70+
Clients served
50+
Faster dashboard execution
83%
Harsh Shah
IIT Madras•Software Developer I•NemX Infotech•AI & LLM Engineer•Full Stack•IIT Madras•Software Developer I•NemX Infotech•AI & LLM Engineer•Full Stack•

01 / About

A blend of engineering & education.

Software Developer I at NemX Infotech, building enterprise financial platforms and scalable backend services using C#, ASP.NET, React, and PostgreSQL. Redesigned database queries to cut dashboard execution time by 83% (5 min to under 50 sec) for systems processing over 1M financial records daily, and reduced backend memory consumption by 62% (32 GB to 12 GB) through optimization and refactoring.

Alongside my full-time role, I am pursuing a B.Sc. in Data Science from IIT Madras (CGPA 8.73), where I mentor 60+ students as a Python Buddy and build AI-powered solutions using LangChain, OpenAI/Claude APIs, RAG pipelines, and agentic workflows.

Languages

JavaScript, TypeScript, Python, SQL, C#

Frontend

React, Next.js, TypeScript, Tailwind CSS, GSAP, Framer Motion

Backend

Node.js, Express.js, FastAPI, Flask, REST APIs, JWT, OAuth

Databases

PostgreSQL, MongoDB, MySQL, Firebase

AI & ML

OpenAI, Gemini, Claude, LangChain, LangGraph, RAG, AI Agents

DevOps

Git, GitHub Actions, Docker, Linux, Postman, Vercel

02 / Career

Professional Experience

Jun 2025 – Present

Software Developer I

NemX Infotech • Surat, Gujarat, India

  • Reduced dashboard execution time by 83% (5 mins to <50 secs) by redesigning PostgreSQL queries using batching, temporary views, and caching for systems processing over 1M financial records daily.
  • Reduced backend memory consumption by 62% (32 GB to 12 GB) through database optimization and backend refactoring.
  • Designed and deployed 17+ REST APIs, 5 payment integrations (Stripe/Razorpay), and 5 JWT/OAuth auth services.
  • Built CI/CD pipelines using GitHub Actions and custom Bash scripts, automating deployments across production servers.
  • Diagnosed and resolved multiple production incidents, improving platform reliability for over 100 banking entities.

Jan 2020 – Present

Full Stack Software Engineer

Freelance • Remote

  • Delivered 70+ production web applications, dashboards, and automation platforms for 50+ clients.
  • Built scalable full-stack applications using React, Next.js, Express.js, PostgreSQL and MongoDB.
  • Managed projects from requirements gathering through architecture and deployment, yielding multiple repeat clients.
  • Integrated third-party APIs, payment gateways, and workflow automation into production applications.

Feb 2026 – Present

Python Buddy (Teaching Assistant)

Indian Institute of Technology Madras • Remote

  • Mentored 60+ students across three batches through Python programming sessions and debugging support.
  • Guided students on software engineering fundamentals, clean coding practices and problem-solving.

03 / Selected Work

Featured Projects

Full-Stack Engineering · Performance Optimization

NDA

Optimizing a High-Volume Enterprise Dashboard • 2025

Reworked the data layer behind a high-volume enterprise financial dashboard, so a report that took about five minutes now runs in under 50 seconds.

Faster execution
83%
Report runtime
5 min → <50 s
PostgreSQLC#ASP.NETReact
Proprietary Project
TraceIQ

AI Engineering · Agentic Workflows

Live Demo

TraceIQ • 2026

Agentic research system that shows its working. Agents plan, research and write evidence-backed reports, streaming every step into a Next.js 16 interface over SSE, and a critic loop runs the research again when the evidence is thin.

Next.jsLangGraphFastAPIPythonSSE

AI Automation · API Integrations

NDA

Automating Lead Qualification with AI • 2025

An agentic pipeline that sources leads, cleans and qualifies them with an LLM, syncs the results to the CRM, and triggers WhatsApp and Email outreach.

Manual qualification automated
~70%
PythonLangChainFastAPI
Proprietary Project

More projects

Offscreen

AI Outdoor Discovery Journal

Live Demo

Offscreen • 2026

Outside, not online. One small real-world challenge, then you put the phone down. Gemma judges the photo you bring back, scores it and writes a reflection. Built as a Hacktoberfest 2026 open-source AI challenge entry, with two LangGraph graphs and 169 offline tests.

Next.jsLangGraphGemmaFastAPIPython
LifeOS

Multimodal AI Life-Admin Assistant

Live Demo

LifeOS • 2026

Turns scattered screenshots into an actionable plan. Reads multiple images together in one multimodal Gemma request, reasons across deadlines, events and dependencies, detects conflicts, and returns a prioritised plan with grounded chat.

Next.jsGemmaFastAPILangChainPython
HirePilot

AI Career Coach & Resume Platform

Live Project

HirePilot • 2026

AI-powered ATS resume checker, personalized career coaching assistant, and AI-generated interview preparation quizzes.

Next.jsAI/LLM
Neurox AI

Neural Intelligence Platform

Live Project

Neurox AI • 2026

Immersive cyberpunk-inspired UI/UX with real-time dashboard visualizations. Built with React, Tailwind CSS, and Framer Motion.

ReactFramer Motion
Velvet Pour

Premium Mojito Experience

Live Project

Velvet Pour • 2026

Elegant product showcase with interactive menu and storytelling sections. Responsive design with smooth animations for a premium brand experience.

ReactNext.jsFramer Motion

CRM & Dashboard

NDA

Custom CRM & Invoice System • 2025

Business management platform for customers, orders, invoices, and workflow tracking. Designed relational Postgres schema and REST APIs with role-based auth.

Node.jsPostgreSQLReact
Proprietary Project
Snapgram Platform

Full Stack Social Media

Live Project

Snapgram Platform • 2024

Full-stack MERN social media app with user auth, media uploads, social feeds, and scalable backend APIs.

ReactNode.jsMongoDB
SoundByte Music Streaming

Music Streaming App

Live Project

SoundByte Music Streaming • 2024

Spotify alternative with zero-friction onboarding. Built performant streaming playback and responsive UX using React and Firebase.

ReactFirebaseREST APIs
Personal Blog Site

Content Platform

Live Project

Personal Blog Site • 2024

A personal blog for sharing knowledge on web development, AI, and technology. Built with modern web technologies for optimal reading experience.

Next.jsMDXTailwind CSS

Data Analytics & ML

NDA

Business Data Analytics System • 2024

End-to-end data analytics pipeline for a textile wholesaler. Applied regression models for demand forecasting and query-optimized reporting.

PythonScikit-learnSQL
Proprietary Project

Backend Automation Services

NDA

AI Workflow Automation Tool • 2024

Modular backend automation services with LLM-assisted workflow orchestration. Implemented structured exception handling and pre-execution verification logic.

PythonC#FastAPI
Proprietary Project
Sumz - The AI Summariser

AI Startup Landing Page

Live Project

Sumz - The AI Summariser • 2022

AI-powered application with serverless API routes and LLM response integration. Increased traffic by 25% and UX metrics by 15%.

Next.jsOpenAI APITailwind CSS

04 / Contact

Have a project in mind?

Tell me what you're building and I'll get back to you within a day.

What do you need help with?

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Available for Full-Time • Contract • Remote