Ankit Sinha · Backend EngineerThe Engineering DeskIssue No. 01 · 27 SEP 2026

Ankit Sinha



The Engineering Desk

How the Systems Are Thought Through

Technical reports from the projects: the trade-offs, the failure modes and the reasoning behind each design — not another gallery.

  1. CLIENT01SHA-25602API03DEDUP?04S305

    Technical Report 001 · July 2026

    Content-Addressable Storage

    Storing the same bytes once, and deleting them exactly when nobody needs them.

    Filed under: Storage · Distributed Systems · HashVault

  2. GATEWAY01RABBITMQ02KAFKA03MODERATE04REDIS05

    Technical Report 002 · September 2025

    Designing a Message-Driven System

    Six services, one conversation, and why none of them call each other.

    Filed under: Messaging · Microservices · Konnect

  3. LOGIN01ACCESS 15M02REFRESH03ROTATE04REDIS05

    Technical Report 003 · June 2026

    JWT Rotation and Authentication Architecture

    Short-lived access, opaque refresh, and a stolen token that cannot be replayed.

    Filed under: Security · Authentication · HashVault · Konnect

  4. BROWSER01RAZORPAY02SIGNATURE03HMAC04CONFIRM05

    Technical Report 004 · April 2026

    Payments Confirmed on Cryptographic Proof

    Why a donation is not complete because the browser says so.

    Filed under: Security · Payments · Denthinkers Foundation