Rajeev Ranjan
Full-Stack & AI Engineer
I build web platforms and applied-AI products — voice agents, RAG systems, and real-time apps. Currently Tech Lead at Originn and a Data Science student at IIT Madras.
What I do
I turn hard product ideas into shipped software.
From a startup platform with its own AI screener to voice agents that update a chart as you speak — I work across the stack, and increasingly where the stack meets AI.
Full-Stack Platforms
End-to-end products — typed APIs, databases, dashboards and design systems — shipped as monorepos that scale.
Applied AI
Voice agents, RAG pipelines, LLM tool-calling and knowledge-graph scoring, wired into real product flows.
Mobile & Real-time
Flutter apps and real-time experiences over WebRTC and Socket.io, from BLE discovery to live charting.
Cloud & DevOps
Production delivery on AWS and Google Cloud — Docker, CI/CD, billing, secrets and multi-tenancy.
Selected work
Featured projects
FAQ
Frequently asked
Who is Rajeev Ranjan?
Rajeev Ranjan is a full-stack and AI engineer based in Surat, India. He is the Tech Lead at the startup Originn and a Data Science student at IIT Madras, and he builds web platforms and applied-AI products such as voice agents, RAG systems and real-time apps.
What does Rajeev Ranjan build?
He builds full-stack web platforms, AI products (voice agents, RAG pipelines, LLM tool-calling), mobile apps with Flutter, and developer and desktop tools. Recent work includes Originn (a startup platform), CloudGuard (an AI-orchestrated security-scanning SaaS), a voice-driven dental charting agent, and Zync, a BLE social app published on the Google Play Store.
What technologies does Rajeev Ranjan use?
On the web and backend he uses Next.js, React, Node.js, NestJS, FastAPI and Python; Flutter for mobile; PostgreSQL, MongoDB and Redis for data; vector databases and LLM tooling for AI; and AWS or Google Cloud with Docker for delivery.
Is Rajeev Ranjan available for work?
Yes. Rajeev takes on a small number of full-stack and AI projects, collaborations and freelance engagements. The fastest way to reach him is through the contact page or by email.
Where is Rajeev Ranjan based?
Rajeev Ranjan is based in Surat, India, and works with teams and clients remotely worldwide.
Have something ambitious to build?
I take on a small number of full-stack and AI projects. If you have a product that needs real engineering, let's talk.
Start a conversation