Available for freelance & full-time · India · Remote friendly

Rahul Choudhary

Full Stack & AI Developer · Software Engineer

I build production-grade platforms and Agentic AI / LLM systems on the MERN and PERN stacks - owning them from architecture through deployment.

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0: Products shipped to production
0: DSA problems solved
0: GitHub contributions

Rahul Choudhary, Full Stack and AI Developer based in India — Rahul ChoudharyIndia

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About

Engineering that survives contact with real users

Architecture, API design, data modelling and deployment - I take responsibility for the whole path a feature travels before anyone calls it done.

I'm a Full Stack & AI Developer at Omnithrive Technologies. Most of my work sits where a clean interface meets a system that has to stay correct under load - type-safe REST APIs, real-time services, and Agentic AI workflows that call tools and reason across several steps instead of guessing once.

My range covers the MERN and PERN stacks, system design, and cloud deployment on Azure and Databricks. I'm finishing a B.E. in Computer Science at Chandigarh University, and I keep shipping open source - most recently durabolt, a library that makes risky backend operations exactly-once using only the Postgres you already run.

Right now I'm open to freelance briefs, contract work, and full-time engineering roles.

Reliability isn't a feature you add at the end. It's the shape of the system you chose on day one.

Frontend

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

Backend

Node.js, Express, FastAPI, REST, WebSockets, auth

Data & cloud

PostgreSQL, MongoDB, SQL Server, Azure, Databricks

AI systems

Agentic workflows, LLM integration, RAG, evals

Delivery

Docker, CI/CD, Vercel, PostHog, Postman

Foundations

DSA, system design, DBMS, operating systems, networks

Experience

Where the work has been done

Three years of shipping - from a client's first clinic website to agentic automation inside a healthcare platform.

Jun 2026 - PresentRemote / HybridCurrent role

Full Stack AI Developer

Omnithrive Technologies

Develop and deploy full-stack AI features in Next.js and TypeScript, owning testing, QA and the CI/CD path to production.
Build Agentic AI and LLM automation with tool-calling and multi-step reasoning that removes manual steps from business operations.
Integrate ABHA (Ayushman Bharat) healthcare interoperability APIs with consent-driven, secure data exchange between services.
Architect type-safe REST APIs and real-time services, improving reliability and observability across the platform.
Translate product requirements into scalable features with the design and product teams, shipped on schedule.

Next.jsTypeScriptAgentic AILLMABHA APIsCI/CD

Dec 2024 - 2025Freelance

MERN Stack Developer

S Raj Infra Projects Pvt. Ltd.

Architected and shipped a responsive enterprise SaaS platform end to end with React, Tailwind CSS and a component-driven design system.
Engineered animated interfaces with Framer Motion, lifting user-engagement metrics by 40%.
Connected Firebase services and SMTP automation, then owned CI and the production deployment.

ReactTailwindFramer MotionFirebaseSMTP

Dec 2023 - Jan 2024Freelance

Frontend Developer

R K Technical Support

Led development of a healthcare clinic website in HTML, CSS and JavaScript for a real client.
Built a fully responsive layout with a dynamic Google Maps integration for live location tracking.
Handed over to the client and deployed for day-to-day use across mobile, tablet and desktop.

HTMLCSSJavaScriptGoogle Maps API

Stack

The toolkit, and how deep it goes

Sharpened on production projects - pixel-accurate interfaces, resilient backends, and LLM-powered automation that holds up outside a demo.

I build end-to-end products across MERN and PERN - clean APIs, efficient data models, and Agentic AI woven into systems that stay reliable as they scale.

Full-stack engineering94

System & API design90

AI & LLM integration88

Databases & query tuning85

Cloud, Docker & CI/CD82

Languages 05

Java
JavaScript
TypeScript
Python
SQL

Frontend 06

React.js
Next.js
HTML
CSS
Tailwind
Framer Motion

Backend 06

Node.js
Express
FastAPI
REST
WebSockets
Auth

Data & cloud 07

PostgreSQL
MongoDB
SQL Server
Firebase
Supabase
Azure
Databricks

AI & automation 05

Agentic AI
LLM integration
Gemini
Claude
Prompt engineering

Tools & DevOps 07

Docker
Git
GitHub
CI/CD
Postman
PostHog
Vercel

Selected work

Seven things I designed, built and shipped

Open source, healthcare, commerce and developer tooling. Images are held in monochrome until you hover - then they show their real colours.

npmjs.com

012026Open sourceFeatured

durabolt

A zero-dependency Node.js library that makes risky backend operations - charges, emails, third-party calls, webhooks - safe and self-healing using only the Postgres you already run. Three composable primitives: once() for exactly-once idempotency, a transactional outbox so a write and its event commit or roll back together, and signed, retried, dead-lettered webhooks you can trust.

Node.jsTypeScriptPostgreSQLnpm

View on npm Source

ciphersqlschool.vercel.app

02March 2026Full-stack

CipherSQL Studio

An interactive SQL learning platform with 20–30 real-world dataset challenges, instant query feedback, PK/FK schema visualisation and an AI hint engine. I cut multi-user workspace provisioning from over 60 seconds to under one, so concurrent learners each get an isolated execution environment without waiting.

JavaScriptPostgreSQLSQL ServerAI hints

Live demo Source

medoshieldai.vercel.app

03January 2026Healthcare AI

MEDO Shield AI

A telemedicine platform with separate doctor and patient portals, appointment management, real-time WebSocket chat and AI symptom guidance. Its privacy-first video engine converts patient uploads into 33-point skeletal data without storing raw footage, detecting tremors in the 4–12 Hz band and gait anomalies for neurological risk classification.

ReactFastAPIPythonMongoDBGemini AIDocker

Live demo Source

combofinder.vercel.app

04March 2025Tooling

ComboFinder

A web tool for uploading and reshaping data files fast. Pick the columns that matter - product name, price, anything - and generate a refined output. Built with React, Tailwind and Node.js with secure file handling, for e-commerce catalogues, analysis and reporting.

ReactNode.jsExpressVercel

Live demo Source

srajinfra.vercel.app

05Dec 2024 - presentClient work

S Raj Infra Projects

An enterprise SaaS platform in React and Tailwind, with Framer Motion interfaces that lifted engagement by 40%. Now in production as the company's primary client-acquisition and service showcase, backed by Firebase and SMTP automation.

ReactNode.jsExpressFirebase

Live site Source

github.com

06Mar - Apr 2024E-commerce

BharatMarket

A full e-commerce build in React, Node.js, Express and Tailwind on Firebase - authentication, real-time database updates and a checkout that doesn't stumble. Docker and Jenkins drive the CI/CD pipeline for automated testing, building and release.

ReactNode.jsFirebaseDockerJenkins

Source

rktechs.co

07Dec 2023 - Jan 2024Client work

R K Technical Support

A healthcare clinic website in plain HTML, CSS and JavaScript - fully responsive across phone, tablet and desktop, with a dynamic Google Maps integration for live tracking. Deployed by the client and still in real-world use.

HTMLCSSJavaScriptGoogle Maps API

Live site Source

Services

What you can hire me to build

Full-stack web and mobile, AI agents, LLM integration, cloud and data - end-to-end product engineering, available for freelance and contract work.

Full-stack web development

End-to-end apps on MERN and PERN - React, Next.js, Node, Express and FastAPI. Type-safe, fast, and production-ready from architecture to deployment.

ReactNext.jsNodeFastAPI

AI & LLM engineering

Put Gemini, Claude or GPT inside your product properly - RAG pipelines, prompt engineering, streaming responses and evaluation you can measure.

LLMRAGEvals

AI agents & automation

Agentic workflows with tool-calling and multi-step reasoning that take real operational work off your team's hands.

Agentic AITool-calling

Cloud & DevOps

Ship and scale on Azure and Databricks with Docker, CI/CD and Vercel - releases that are reliable and observable.

AzureDockerCI/CD

Database design

Schema design, indexing and query optimisation across PostgreSQL, MongoDB and SQL Server - including rescuing queries that have quietly got slow.

PostgreSQLMongoDBSQL Server

APIs & integrations

REST, GraphQL and WebSocket APIs, plus third-party work - ABHA healthcare interoperability, Google Maps, SMTP and payments.

RESTGraphQLWebSockets

App & mobile

Cross-platform apps and installable PWAs with Kotlin and responsive, offline-capable frontends.

KotlinPWAResponsive

Interface & motion

Mobile-first, accessible interfaces with micro-interactions, 3D tilt and motion design that makes a product feel considered.

TailwindFramer Motiona11y

Background

Education, patent and certifications

The academic base and the recognition sitting behind the shipped work.

Aug 2022 - Jun 2026B.E. in Computer Science & EngineeringChandigarh University (CU), India

CGPA 7.56
Data structures, system design, DBMS, operating systems and computer networks
Consistent focus on shipping production-grade software alongside coursework

2020 - 2022Senior SecondarySt D. R. Public Senior Secondary School

Intermediate 70.3% · High school 74.8%

Competitive programming400+ DSA problems, 1000+ GitHub contributionsLeetCode practice paired with open-source work, kept up continuously rather than in bursts.

Patent · PublishedAI-Enhanced Neuroadaptive VR Therapy SystemIndian Government Patent Portal · Application No. 202511113779

Mar 2026Advanced SQL & Database DesignAWS Training & Certification

CertifiedFull-Stack Web DevelopmentIBM · Udemy

Open sourcedurabolt on npmPublished under @rahulchoudhary05 - exactly-once execution for Node.js and Postgres

Contact

Tell me what you're building

A project brief, a freelance engagement, or a role you're hiring for - send it over. I usually reply within a day.

Let's build something that stays built.

Open to freelance projects, contract work and full-time roles. Name the endpoint, the workflow or the idea - I'll help you ship it.

Emailrahulchoudhary.sk@gmail.com Phone+91 86280 32512 GitHubRahulChoudhary05 LinkedInin/rahulchoudhary210505 X@krahul_21