---
title: "Kartik Mehta (@mehtaaaaaah) | Hashnode"
description: "Software Engineer. Read the latest articles by Kartik Mehta on Hashnode."
url: "https://hashnode.com/@mehtaaaaaah"
---

@mehtaaaaaah

# Kartik Mehta

@mehtaaaaaah · New Delhi, India · Joined January 2023

Software Engineer

[Website](https://www.mrmehta.in/)

### [Nearby Friends](https://writer.mrmehta.in/nearby-friends?utm_source=hashnode&utm_medium=feed)

How a Nearby Friends feature streams live locations at scale using WebSockets, Redis Pub/Sub and consistent hashing.

7 min read · [writer.mrmehta.in](https://writer.mrmehta.in/nearby-friends?utm_source=hashnode&utm_medium=feed)

[Sep 27](https://hashnode.com/posts/nearby-friends/6ab8cff897558f384ec7d267)

### [How "nearby" actually works?](https://writer.mrmehta.in/how-nearby-actually-works?utm_source=hashnode&utm_medium=feed)

This article explains how a proximity service finds nearby places at scale using geohash, quadtree and Redis caching.

9 min read · [writer.mrmehta.in](https://writer.mrmehta.in/how-nearby-actually-works?utm_source=hashnode&utm_medium=feed)

[Sep 23](https://hashnode.com/posts/how-nearby-actually-works/6ab401db3239a52bd553cbdc)

### [I Built an Autonomous Testing Framework for AI Agents.](https://writer.mrmehta.in/i-built-an-autonomous-testing-framework-for-ai-agents?utm_source=hashnode&utm_medium=feed)

An autonomous, framework-agnostic testing harness where AI agents write, run, and remember the tests. (14)

12 min read · [writer.mrmehta.in](https://writer.mrmehta.in/i-built-an-autonomous-testing-framework-for-ai-agents?utm_source=hashnode&utm_medium=feed)

[Aug 24](https://hashnode.com/posts/i-built-an-autonomous-testing-framework-for-ai-agents/6a8c3e13d9c33e404a998de0)

### [Agents should be Self-ish](https://writer.mrmehta.in/agents-should-be-self-ish?utm_source=hashnode&utm_medium=feed)

Self gives AI agents verifiable human identity, preventing Sybil attacks, impersonation, and fraud while preserving privacy.

8 min read · [writer.mrmehta.in](https://writer.mrmehta.in/agents-should-be-self-ish?utm_source=hashnode&utm_medium=feed)

[Aug 19](https://hashnode.com/posts/agents-should-be-self-ish/6a8553cb5b3fcc302f40865e)

### [Subagents vs A2A: One Is a Pattern, One Is a Protocol](https://writer.mrmehta.in/subagents-vs-a2a-one-is-a-pattern-one-is-a-protocol?utm_source=hashnode&utm_medium=feed)

Subagents structure one agent's internals. A2A connects agents across organizations. A TypeScript guide to agent cards, tasks, and auth.

15 min read · [writer.mrmehta.in](https://writer.mrmehta.in/subagents-vs-a2a-one-is-a-pattern-one-is-a-protocol?utm_source=hashnode&utm_medium=feed)

[Aug 10](https://hashnode.com/posts/subagents-vs-a2a-one-is-a-pattern-one-is-a-protocol/6a7a1061d8da37b47745e0f8)