Harshit Jain

Harshit Jain

love building and experimenting ideas
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About

Backend engineer. I work on distributed systems and spend most of my time experimenting, building and breaking I worked with LiteLLM (BerriAI, YC W23) and did GSoC '24 with Cloud-CV. Right now I'm building and shipping projects like SignGuard in public. It blocks disposable emails and fake signups from burning your free-tier credits. Started as a small MIT-licensed Python package, but people kept asking for live checks so I turned it into a hosted API. This is my first time building something solo in public, so I'm figuring out the distribution part as I go. If you work on backend infra or LLM tooling, happy to chat - DMs are open

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Maker History

  • SignGuard
    SignGuardBlock burner emails before they drain your AI credits
    Sep 2026
    • 🎉
    Joined Product HuntMarch 29th, 2025

Forums

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11h ago

SignGuard - Block burner emails before they drain your AI credits

Bots use disposable emails to farm your free tier — burning API credits, SMS costs, and server time. SignGuard scores every signup: disposable domains, typosquats, catch-alls, SMTP checks, domain age. 3 lines of code. Free tier, then $19/mo.
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