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Roshan Chhetri

Roshan Chhetri · AI Engineer

I build production LLM systems, not demos.

Most of my work is agentic and retrieval-based. The part I care about is the gap between a demo that works once and a system that holds up with real users on it.

Open to relocation, requires visa sponsorshipImmediate joiner, open to relocate within India· Sikkim, India
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Roshan Chhetri, AI Engineer

Selected work

All projects

Spaced Revision

An agentic content pipeline that has run in production for a year

A spaced-repetition study platform for around 13,000 students. I built the LangGraph agent that turns source material into MCQs, flashcards and study notes without an educator writing them by hand, plus the real-time chat layer around it.

~13,000
total registered users(internal)
4,000+
learning items generated in production(internal)
role
AI Engineer
status
live
when
2025 to present
  • LangGraph
  • LangChain
  • RAG
  • Python
  • FastAPI
  • FAISS

Threadly

Semantic search over an infinite note canvas

Sticky notes on an infinite canvas that find each other. Every note is embedded on write, and a pgvector nearest-neighbour query surfaces related notes without anyone tagging anything. Built and shipped solo.

top 5 of 6
pgvector nearest neighbours, self dropped
text-embedding-3-small
embedding model, one vector per note
role
Solo, design through deploy
status
live
when
2025
  • Next.js 16
  • React 19
  • TypeScript
  • Tailwind v4
  • Supabase
  • Postgres

Neural Network from Scratch in C

392 lines, no ML libraries, and a bug that was not where I looked

A feedforward network in one C file with nothing but libc and libm. Forward and backward propagation, He and Xavier initialisation, Box-Muller sampling, binary cross-entropy. The interesting part is not that it trains, it is why it would not.

81.01%
test accuracy
8 to 4 to 1
architecture, seed 42, reproducible
role
Solo
status
live
when
2026
  • C
  • gcc
  • no ML libraries

Where I have worked

  1. Spaced Revision

    ·AI Engineer

    2025 to present · Sikkim, India

    • Built and deployed a LangGraph agentic content-generation system that uses multi-step RAG to produce MCQs, flashcards and study notes from source material, generating 4,000+ items in production over the past year and cutting educator content-preparation time by 60%.
    • Designed and shipped a real-time chat service on Socket.IO and Express supporting 1:1 and group channels, spanning three stores across two services: messages and read state in MongoDB, identity and entitlement in MySQL, and Redis-backed queues driving push fan-out. Room and conversation keys are derived rather than negotiated, so both participants resolve the same identifier independently. In production for 9+ months.

  2. Bytesberry Technologies

    ·Software Development Intern

    2024 to 2025

    • Worked on a headless CMS in React and Node/Express, implementing role-based access control and contributing across the application lifecycle.
    • Worked in an Agile team through the full release cycle, contributing to code reviews and cross-functional technical planning.

  3. Waglogy Tech LLP

    ·Data Analyst and AI Engineer

    2022 to 2025 · Freelance, concurrent

    • Built an LLM-powered automation pipeline that extracted and classified client data, routed customer-support requests, and folded Google search-trend data into SEO work on emerging Sikkim tourism topics.
    • Owned the extraction and routing layer, removing the manual data-entry step from the delivery process entirely.

What I work with

AI / GenAI
LLM applications, RAG pipelines, Agentic systems, OpenAI API, PyTorch, Embeddings
Agent frameworks
LangGraph, LangChain, LangSmith
Backend
Python, FastAPI, Node.js, Express, REST, SQL
Data & retrieval
Vector databases, pgvector, FAISS, ChromaDB, PostgreSQL, MySQL, Redis, MongoDB
Infrastructure
Docker, AWS, GitHub Actions, CI/CD
Frontend
TypeScript, React, Next.js, Tailwind CSS

On GitHub

@Roshan-Chhetri28

Get in touch

The fastest way to reach me is email. I read everything and reply to anything that is not a template.

roshanchhetri931@gmail.comLinkedInGitHub