Portfolio Gagan Arora

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Gagan Arora

Full Stack Software Engineer building AI-powered, real-time, and cloud applications.

I ship RAG and AI-powered features, OTT platforms, payments and e-commerce systems end to end.

  • LLM APIs
  • RAG
  • Node.js
  • Next.js
  • AWS
  • Azure
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Gagan Arora, Full Stack Software Engineer, in Noida
Currently Software Engineer at OnGraph Technologies

About Me

I'm a Full Stack Software Engineer with 3+ years of experience building AI-powered, real-time and cloud applications.

My work covers the whole stack: Node.js and Express APIs, React and Next.js interfaces, MongoDB and MySQL data, and deployments on AWS and Azure. Along the way I've delivered RAG, OTT, advertising, e-commerce, CRM and workflow systems, and published Android apps of my own.

I like owning a product end to end, from the first API to the final deployment, and I care about software that is efficient, scalable and built around the people who use it.

  • End-to-end delivery

    APIs, data, interfaces and deployment, owned as one product.

  • AI in real products

    RAG, embeddings and AI-powered features that ship.

  • Real-time at scale

    Live platforms, analytics and payments built to keep running.

  • 3+

    Years of experience

  • 25

    Projects built

  • 20+

    Technologies used

  • 4

    Companies worked with

Expertise

What I Build

  • AI & LLM applications

    RAG systems with embeddings and vector search, prompt engineering and streaming responses from LLM APIs, and AI video avatars with Tavus AI.

    LLM APIs RAG Vector Search Tavus AI

  • Real-time & OTT platforms

    Live TV with parental controls and scheduled playback, real-time analytics and event tracking.

  • Payments & monetization

    Stripe subscriptions with region-based pricing, Razorpay, webhook validation and ad operations.

  • E-commerce, CRM & internal tools

    Storefronts with a custom CMS for catalog, inventory, orders and fulfilment, plus admin dashboards, CRMs and workflow automation that keep a business running.

    MERN Next.js REST APIs Admin Dashboards

  • Cloud & deployment

    Shipping to AWS with EC2, S3, Amplify and Lightsail, working with Azure, and delivering push notifications through Firebase Cloud Messaging.

    AWS Azure Firebase (FCM)

  • Mobile apps

    Android apps of my own, built with React Native, Kotlin and Flutter.

    See my apps

Technologies

My Skills

Languages
JavaScript TypeScript Python
Frameworks / Libraries
Node.js Express.js React.js Next.js Tailwind CSS
AI / LLM
LLM APIs RAG Embeddings Vector Search Prompt Engineering Streaming Responses Tavus AI
Databases
MongoDB MySQL
Cloud / Tools
AWS Azure Firebase (FCM) Stripe Webhooks Git

Involvement

My Experience

Four companies since February 2023. Two internships, then two full-time roles.

  1. Software Engineer

    OnGraph Technologies, Noida

    Current

    November 2025 – Present

    • Owned end-to-end delivery of AI-enabled, OTT, advertising, payment, and admin features across web and mobile products.
    • Designed and shipped live TV capabilities, including parental controls, content restrictions, and scheduled playback.
    • Architected monetization workflows for ad operations, subscriptions, region-based pricing, and push notifications.
    • Built and maintained admin and content-management systems for analytics, user management, and ticketing, supporting 10,000+ daily active users.

  2. Full Stack Developer

    Prem Industries India Limited, Greater Noida

    January 2024 – November 2025

    • Delivered 5+ MERN and Next.js applications serving 1,000+ internal users and streamlining business workflows.
    • Owned development of an image-tracking system processing 50,000+ user-uploaded images monthly with real-time operational updates.
    • Developed e-commerce and internal applications with secure REST APIs, React interfaces, workflow automation, and AWS deployment using EC2, S3, and Amplify.

  3. Backend Developer Intern

    BelleGirl Lifestyles Private Limited

    August 2023 – January 2024

    • Customized Shopify storefronts with tailored themes, apps, and automation.
    • Scraped and structured web data using AI tools and Python.
    • Collaborated with teams to prepare reports and improve workflows.

  4. Frontend Developer Intern

    Seiko Media (DIGIXOM SOLUTIONS)

    February 2023 – April 2023

    • Built responsive user interfaces using HTML, CSS, and JavaScript frameworks.
    • Improved website design for enhanced user experience and performance.
    • Collaborated with backend teams to integrate APIs into the frontend.

Selected Work

My Projects

Three projects up close, each with its own page. More are in the grid below.

18 projects

Case studies

  • AI Clinical Interview Assistant

    Psych-GPT

    An AI video avatar that takes a patient's medical history before the consultation begins.

    Project details

    What's inside

    Psych-GPT

    • For the patient

      • An interview before the visit

      • A video avatar to talk to

    • Inside Psych-GPT

      • Live conversation

      • Clinical workflow

    • For the clinician

      • Session summary

      • Ready before the consultation

    Tavus AI Video Avatars Real-Time Sessions Clinical Workflows

    Private: source code and internal screens are not public.

  • OTT Platform

    NABTT

    An OTT platform with family profiles, parental controls, subscriptions and advertising.

    Project details View live

    What's inside

    NABTT

    • Getting in

      • Accounts

      • Profiles

      • Profile PIN

    • Watching

      • Home

      • Title pages

      • Playback

      • +3 more

    • Parent oversight

      • Child profiles

      • Age filter

      • Screen time

      • Watchlist-only mode

    • Monetisation

      • Paid plans

      • Regional pricing

      • Payment checks

      • +2 more

    • Behind the scenes

      • Live analytics

      • Roles and access

      • Notifications

    Real-Time Analytics Dynamic Ad Insertion RBAC Stripe Firebase FCM

    Live, behind a subscriber sign-in.

  • E-commerce Platform

    store.prempackaging.com

    An online packaging store, and the custom CMS its team runs it from.

    Project details View live

    What's inside

    store.prempackaging.com

    • For customers

      • Catalogue and search

      • Size filters

      • Cart and checkout

      • Custom orders

    • Under the hood

      • Payments

      • One back end

      • Hosting

    • For the team

      • Orders and fulfilment

      • Catalog and inventory

      • Admin dashboard

    Node.js / Express React Custom CMS Razorpay AWS EC2 & Amplify

    Full Stack Developer, Prem Industries India Limited.

Some of this work was built for employers and their clients, so its source code and internal screens are not public. I'm glad to walk through the details.

More projects

Apps by Gagan Arora

My Mobile Apps

On the side, I publish my own Android apps. One live, one in testing, one on the way.

apps.gagandev.in
Bounce Escape icon

Physics puzzle game

Bounce Escape

Aim the ball, bounce off the walls to open the door, then escape the box. Easy, Medium and Hard modes, playable offline with no account.

Live on Google Play React Native Expo
View details Google Play
Enough icon

Screen-time limits

Enough

A calm screen-time app for Android. Set a daily limit for the apps that take up your day and get a gentle heads-up before time runs out. Everything stays on your phone.

Under testing Kotlin Android
View details
Upcoming finance app icon

Finance

A privacy-first expense tracker for Android. It detects expenses from your bank alerts and you sort each one into your own categories. No bank logins, no cloud.

Coming soon Flutter Android
Follow on the apps site

Learning

My Education

  1. 2020 – 2024

    Inderprastha Engineering College

    CGPA 7.56

    Bachelor of Technology in Information Technology

    Graduated in Information Technology (November 2020 – June 2024). Skilled in the MERN stack, Next.js and AWS services such as Amplify, EC2, Lightsail, and S3 to develop and deploy scalable applications.

  2. 2023

    Honors & Awards

    1st Place, Webkriti Front-End Design Competition

    Built a responsive React and Tailwind CSS web application under strict time constraints.

    View certificate

  3. 2020

    Ramagya School

    12th Standard CBSE

    Completed 12th Standard with Physics, Chemistry, and Mathematics (PCM). Built a strong foundation in analytical thinking, problem-solving, and logical reasoning.

  4. 2018

    Ramagya School

    10th Standard CBSE

    Completed 10th Standard with distinction, gaining a strong academic foundation and essential skills in mathematics, science, and communication for higher education.

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