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Armeet Singh Jatyani

Armeet Singh Jatyani

Founder (YC F25) & former Caltech AI researcher

armeet
San Francisco (Dogpatch)
Joined October 2025

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Summary

Deeply technical founder and AI researcher — Armeet is a founder (Y Combinator Fall 2025) of Arcten and former Caltech AI researcher who has published in top conferences like CVPR and NeurIPS, with deep expertise applying machine learning to medical and scientific imaging. arxiv+3
Caltech researcher across multiple labs — Armeet has led research projects in AI for science and imaging at Caltech, working across physical and biological imaging domains, and publishes reproducible, open research engineering artifacts (project websites, public code, and Hugging Face demos) to make research accessible and reproducible. caltech+5
Committed to outreach and education — Armeet has designed assistive prototypes, taught programming to underrepresented youth, and presented a TEDx talk, reflecting engagement beyond academia and research. youtube+1

Work

Education

Writing

A Unified Model for Compressed Sensing MRI Across Undersampling Patterns

January 1, 2025

CVPR 2025 paper (and arXiv preprint) proposing a unified, neural‑operator approach to compressed‑sensing MRI that is robust across undersampling patterns and image resolutions; shows improved SSIM/PSNR vs baseline and provides code.

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Head safety device (patent application)

January 1, 2022

Patent application (2022) for a head safety / helmet device — related to earlier design and outreach work described in TEDx talk.

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Sandbox Coding Agents Suck (right now)

February 1, 2026

Argues that current sandbox coding agents (Cursor, Codex, Copilot) fall short because they cannot run code or access full developer context; outlines desired features (multiplayer, better UI, true dev environments) and mentions an internal tool (Chopin).

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The Faster Shell

December 1, 2025

Explains switching from fish to bash for speed and minimal startup overhead, and recommends a lightweight prompt (starship) for essential status info.

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Don't Become the Machine

December 1, 2025

A reflective piece on productivity culture arguing against equating self‑worth with constant productivity and advocating for authenticity.

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Web MRI Volume Renderer in Rust

December 1, 2025

Describes a GPU‑accelerated 3D MRI volume renderer written in Rust compiled to WASM, with links to the GitHub repo and live demo.

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Importance of Writing

November 1, 2025

Discusses why human-generated, authentic writing remains valuable even as AI‑generated content becomes widespread.

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The Reasonable Effectiveness of the Web

November 1, 2025

Argues the web provides a fast, broadly capable platform for many applications and highlights the benefits of WebAssembly and rapid development.

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Telegram Alerts for Training

August 1, 2025

Practical guide and code for setting up Telegram notifications for machine‑learning training runs, including a PyTorch Lightning callback implementation.

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Multi-Node Training on TACC Vista

August 1, 2025

Step‑by‑step guide for running multi‑node PyTorch training on TACC Vista with SLURM scripts, environment variable setup, and testing tips.

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