Sigil
AI ResearchSemantic document format for LLM-native context
I'm a developer, designer, and musician currently working as a founding engineer at Claim Health. Most of my career has been spent at early-stage companies, tackling ambiguous problems with small teams and building tools that make complex things feel effortless.
I care most about building for underserved areas - not just tools for developers, but technology for industries with real complexity, like healthcare, eldercare, and education. These are the kinds of problems much of the tech world tends to walk past. I think AI and thoughtful software can meaningfully change what's possible in those areas.
I regularly contribute to open source and build projects of my own. You can check out my work on GitHub.
Founding Engineer · New York, NY
Founding Engineer · New York, NY
Co-founder · Columbus, OH
ML Research Fellow · Columbus, OH
Semantic document format for LLM-native context
LSTM model to quantify tennis point leverage, momentum, and clutch performance
School website and admin platform that increased organic traffic nearly 6×
Fantasy tennis bracket challenge with live scoring and private groups
Stack-agnostic file storage API—POST a file, get a URL
Live Amtrak tracking with real-time positions, delays, and journey timelines
I’m always interested in new ideas, creative work, and the people behind them.
hello@varunkdev.com