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§01 writing

grab a coffee

Writing

Long posts about things I got stuck on. Rate limiting, multi-tenant systems, a projector I had no business getting root on. Older stuff lives on Medium.

  • oct 8, 2026

    15 min read

    Why Rate Limiting Gets Complicated When You Scale Node.js

    Inbound rate limiting is a one-liner. Outbound rate limiting, where your servers have to respect someone else's limits, gets messy the moment you run more than one instance. Here is why, and what you can do about it.

  • sep 10, 2026

    16 min read

    The Night We Forgot the Remote: How I Ended Up Rooting a Projector (and Finding a Backdoor)

    A movie night without a remote turned into a deep dive through Android boot scripts, dynamic partitions, and an OEM backdoor, and ended with a Go server living inside the projector itself.

  • jun 16, 2026

    18 min read

    Building a Plug-and-Play WhatsApp Service for a Multi-Tenant CRM

    A hands-on guide to designing a WhatsApp Cloud API integration that any multi-tenant product can plug into, covering Meta setup, Embedded Signup, onboarding, messaging, webhooks, and analytics.

© 2026 Saurav K. · Pune, IN

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