Hi, I'm
Vinay Jain.
Software EngineerBuilderFounder
I build RAG-based AI systems and the full-stack products they live inside. Currently founder of WebsiNova Technologies, building Karyalo and AI voice agents.
A software engineer turned founder.
I joined GreenFi as a Python and AI engineer, was promoted to Senior Software Engineer and then Tech Lead, and a year later became founding engineer on the same founder's second product.
As Tech Lead I ran a team of five across GreenFi, a climatetech ESG platform, and Lejit AI, a legal tech SaaS I architected from an empty repository — owning architecture, sprint delivery and client communication for both, including taking over the GreenFi codebase after the previous vendor left with no knowledge transfer. In June 2026 I started WebsiNova Technologies, where I take that work directly to clients: RAG-based AI systems, agentic workflows and microservice architecture, built across React, Next.js, Node.js, FastAPI and Django.
- RAG & agentic AI
- Retrieval pipelines over Milvus and ChromaDB, document Q&A, drafting and comparison flows served through FastAPI.
- Backend architecture
- Serverless AWS Lambda and EC2 services, Express and Django APIs, MySQL and Postgres schema design.
- Full-stack product
- React and Next.js front ends wired to typed APIs, multi-tenant role-based access, payments and auth.
- Leading delivery
- Sprint planning for a team of five, client communication, scoping and estimation from first call to release.
Turning ideas into useful products.
Two products, both mine. One turns contracts into a single workflow; the other picks up the phone.
Karyalo
Contract management software
Contracts from first draft to signature in one place — drafting from a team's own precedents and clause library, reviewing against their playbook, sending, and signing.
AI Voice Agents
Voice agents that answer the phone
A low-latency voice agent that answers a call, holds a real conversation about the business, and books a callback. The same code runs in a terminal, a browser, on a real phone number and on WhatsApp.
Contracts in one place.
WebsiNova's own contract platform, covering the whole loop from first draft to signature. Built for law firms, in-house legal teams and business teams.
Visit karyalo.inThe stages below are a diagram of the product's workflow, not screenshots of the application.
- 01
Draft
From your own precedents, approved wording and clause library.
- 02
Check
Every clause graded against your playbook, redline written.
- 03
Send
One revocable link, no account needed at the other end.
- 04
Sign
Bound to the exact version reviewed, executed PDF to everyone.
More conversations. Less manual work.
A low-latency voice agent that answers a call, holds a real conversation about the business, and books a callback. The same code runs four ways with no changes — a terminal, a browser, a real phone number, and WhatsApp.
- Inbound calls
- Receptionist
- Cold outreach
- Follow-ups
- Callbacks
Sub-two-second replies
End-of-turn detection runs inside the speech model, and the LLM starts generating before the caller has finished speaking.
Interruptible
Talk over it and it stops, like a person would — and it knows when to hang up without cutting a caller off mid-sentence.
English, Hindi and Hinglish
US-accented English by default, one environment variable away from Hindi and Hinglish with mid-sentence switching.
Costed per call
Tokens, characters, audio seconds and a total, itemised for every conversation.
- Terminal
- Browser
- Phone number
- Python
- LiveKit Agents
- Deepgram
- Groq
- Rumik
- FastAPI
Technologies I work with.
What I reach for day to day. A marked entry is one I've shipped production systems with.
Programming Languages
3 tools- Python— shipped in production
- JavaScript— shipped in production
- TypeScript
Frontend Development
4 tools- Next.js— shipped in production
- React.js— shipped in production
- HTML— shipped in production
- CSS
Backend Development
4 tools- Node.js— shipped in production
- Django— shipped in production
- FastAPI— shipped in production
- Socket.io
Large Language Models
3 tools- OpenAI— shipped in production
- Claude— shipped in production
- Llama— shipped in production
Database Management
3 tools- MongoDB
- PostgreSQL
- MySQL
DevOps/VCS
4 tools- Docker
- AWS
- Git— shipped in production
- GitHub— shipped in production
Miscellaneous
2 tools- Firebase
- Ubuntu
The journey so far.
Python and AI engineer to tech lead in thirteen months, then founding engineer on a product built from an empty repository.
- Jun 2026 — PresentRemote, IndiaNow
Founder
WebsiNova Technologies
I run my own development studio, providing full-stack and AI development services to clients.
After leading engineering for GreenFi and Lejit AI, I started WebsiNova Technologies to take the same architecture, RAG and AI systems, and full-stack experience directly to clients, from initial scoping and estimation through to delivery.
Alongside client work I build Karyalo, our own contract management platform for law firms, in-house legal teams and business teams.
- Oct 2025 — May 2026Remote, India
Founding Engineer & Tech Lead
Lejit AI
Ran alongside GreenFi, for the same founder.
I joined Lejit AI at day zero as founding engineer and architected the legal tech platform from an empty repository.
Lejit AI was the same founder's second product, and I joined at day zero as founding engineer, architecting the platform from an empty repository while continuing to lead GreenFi.
I built separate flows and role-specific access for lawyers, citizens, corporates, law students and law enforcement, RAG-based legal AI features for document Q&A, drafting, case comparison and legal opinions, and a multi-tenant law enforcement module with department hierarchy and role-based access. I integrated Razorpay payments, Twilio OTP authentication, and i18n across 16 languages.
- Sept 2024 — May 2026Remote, India
Tech Lead
GreenFi
- Python & AI EngineerSept 2024 — Mar 2025
- Senior Software EngineerApr 2025 — Sept 2025
- Tech LeadOct 2025 — May 2026
I joined GreenFi as a Python and AI engineer and was promoted twice, ending as Tech Lead across GreenFi and Lejit AI.
I joined GreenFi as a Python and AI engineer, grew into full-stack work, and was promoted to Senior Software Engineer and then Tech Lead, leading a team of five engineers across GreenFi and Lejit AI.
I took over the codebase after the previous vendor left with no knowledge transfer, reverse-engineered the system, and onboarded the team without missing a client deadline.
I maintained and extended a multi-module ESG platform covering carbon emission tracking, ESG ratings, sustainability reporting, media monitoring and regulatory compliance, and built the RAG pipeline for ESG document Q&A using LLMs and Milvus, served through FastAPI across a serverless AWS Lambda and EC2 backend with an Express 5 API and MySQL.
- Jul 2023 — Oct 2023Remote
ML Engineer Intern
Intel Corp.
I have worked on developing AI solutions at Intel, including building ML models and processing data.
As an ML Engineer Intern I revamped and enhanced more than three ML models using TensorFlow, and deployed them so they integrated cleanly with the surrounding models rather than running in isolation.
- Sept 2022 — Jan 2023Remote
Backend Developer Intern
Creative Finserve Pvt Ltd
I had developed backend logic for a CRM system using Django at Creative Finserve Pvt. Ltd.
I led development of the company's CRM website and its various portals, writing the backend logic in Django. I designed and implemented the data models, database schemas and URL routing behind it.
Things I've built.
My own products, the two platforms I led as tech lead, and the smaller things I build when a problem annoys me enough.
Karyalo: Contract Management Platform
AI-enabled contract platform, covering the whole loop from first draft to signature — drafting from your own precedents, checking every clause against your playbook, sending, and signing.
- Contract AI
- Clause playbooks
- E-signature
- Document workflows
AI Voice Agents
A low-latency voice agent that answers a call, holds a real conversation about the business, and books a callback. The same code runs in a terminal, a browser, on a phone number and on WhatsApp.
- Python
- LiveKit
- Deepgram
- Groq
- FastAPI
GreenFi: Climatetech & ESG Platform
A multi-module ESG platform covering carbon emission tracking, ESG ratings, sustainability reporting, media monitoring and regulatory compliance. I built the RAG pipeline for ESG document Q&A.
- FastAPI
- AWS Lambda
- Milvus
- LLMs
- MySQL
Lejit AI: Legal Tech SaaS Platform
A legal tech SaaS platform I architected from an empty repository, with role-specific flows for lawyers, citizens, corporates, law students and law enforcement, and RAG-based legal AI throughout.
- RAG
- LLMs
- Milvus
- Razorpay
- Twilio
More projects
FinSight: Bank Statement Analyzer
FinSight takes bank statement PDFs, extracts transactions using AI, categorizes expenses, and shows spending insights through interactive charts. Analyzed data can be downloaded as CSV or PDF, no signup is needed, and no data is stored on the server.
- Next JS
- FastAPI
- OpenAI
Supermarket Sales Analysis
The goal of this project is to perform data analytics on Supermarket sales data using various tools and technologies.
- Python
- Looker
- Mage AI
- BigQuery
- GCP
Document QA System - RAG
Document Q&A System, is designed to process PDF documents and provide concise answers to user queries based on the content of uploaded documents. It leverages advanced language models and document processing techniques to deliver accurate and contextually relevant responses.
- Python
- OpenAI
- Langchain
- Streamlit
- ChromaDB
DesiHelper: Your Indian Services Hub in the US
DesiHelper is a comprehensive marketplace platform that allows service providers to create business listings, manage their services, and connect with customers.
- Next JS
- TypeScript
- Python
- FastAPI
- Supabase
Beyond the work
Same engineer.
Bigger problems to solve.
I started out writing Django backends as an intern. Since then I've taken over a codebase with no handover, led a team of five, architected a platform from an empty repository, and started a company. The problems have changed size. The loop hasn't.
- 01Build
- 02Solve
- 03Iterate
Have something to build?
I take on full-stack and AI builds through WebsiNova Technologies — from scoping and estimation to delivery. Thirty minutes is usually enough to tell whether it's a fit.
Currently taking new client work · Mumbai, India · works across US and EU hours
Direct channels