Varun Ragunathan
Staff Software Engineer
This site is the product.
Explore the work, then ask the AI how it was built.
timeline11 years shipping at scale — including identity systems used by 135M+ people
learningDeep-dive courses on AI, LLMs, and architecture with interactive simulations
passkeysZero-password auth — your device is the credential
No password · passkey required
AI assistant · demo
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