---
title: "Arnav Gupta (@arnavgupta) | Hashnode"
description: "Android and NodeJS Developer and Teacher. Have founded a few companies. Read the latest articles by Arnav Gupta on Hashnode."
url: "https://hashnode.com/@arnavgupta"
---

@arnavgupta

# Arnav Gupta

@arnavgupta · Joined April 2022

Android and NodeJS Developer and Teacher. Have founded a few companies.

### [Using Howdy on Linux like Windows Hello](https://arnav.tech/using-howdy-on-linux-like-windows-hello?utm_source=hashnode&utm_medium=feed)

and falling back to password when the webcam is disconnected

6 min read · [arnav.tech](https://arnav.tech/using-howdy-on-linux-like-windows-hello?utm_source=hashnode&utm_medium=feed)

[Jun 3](https://hashnode.com/posts/using-howdy-on-linux-like-windows-hello/6a20857c02f7c5ee1faef3b5)

### [Under the Hood: How 2FA TOTP Authenticator Apps Work](https://arnav.tech/under-the-hood-how-totp-works-and-how-twofac-generates-your-2fa-codes?utm_source=hashnode&utm_medium=feed)

And a walkthrough of how TwoFac Generates Your 2FA Codes

18 min read · [arnav.tech](https://arnav.tech/under-the-hood-how-totp-works-and-how-twofac-generates-your-2fa-codes?utm_source=hashnode&utm_medium=feed)

[Mar 8](https://hashnode.com/posts/under-the-hood-how-totp-works-and-how-twofac-generates-your-2fa-codes/69adb1a486766ac3a64750ae)

### [Architecting TwoFac: My Journey into Kotlin Multiplatform Module Structure](https://arnav.tech/architecting-twofac-my-journey-into-kotlin-multiplatform-module-structure?utm_source=hashnode&utm_medium=feed)

Building a Kotlin Compose Multiplatform app for every possible platform - desktop, mobile, watch, web, browser extensions, CLI and more...

7 min read · [arnav.tech](https://arnav.tech/architecting-twofac-my-journey-into-kotlin-multiplatform-module-structure?utm_source=hashnode&utm_medium=feed)

[Mar 3](https://hashnode.com/posts/architecting-twofac-my-journey-into-kotlin-multiplatform-module-structure/69a63cf4e8e1f9df72f4cc6a)

### [How Personal AI Agents and Agent Orchestrators like OpenClaw or GasTown are Made](https://arnav.tech/how-personal-ai-agents-and-agent-orchestrators-like-openclaw-or-gastown-are-made?utm_source=hashnode&utm_medium=feed)

Learn how personal AI agents like OpenClaw and GasTown are constructed with LLMs, tool calls, memory, and orchestration

13 min read · [arnav.tech](https://arnav.tech/how-personal-ai-agents-and-agent-orchestrators-like-openclaw-or-gastown-are-made?utm_source=hashnode&utm_medium=feed)

[Feb 18](https://hashnode.com/posts/how-personal-ai-agents-and-agent-orchestrators-like-openclaw-or-gastown-are-made/6995200b18a81ab9267c1ab1)

### [env.sync.local - Syncing API keys and secrets between devices in my home LAN](https://arnav.tech/envsynclocal-syncing-api-keys-and-secrets-between-devices-in-my-home-lan?utm_source=hashnode&utm_medium=feed)

My desk is a heterogeneous graveyard of differing architectures. I have a MacBook Pro for daily work, a Razer laptop that mostly serves as an expensive space heater for Windows testing, and a Beelink MiniPC that oscillates between Linux and Windows d...

4 min read · [arnav.tech](https://arnav.tech/envsynclocal-syncing-api-keys-and-secrets-between-devices-in-my-home-lan?utm_source=hashnode&utm_medium=feed)

[Feb 10](https://hashnode.com/posts/envsynclocal-syncing-api-keys-and-secrets-between-devices-in-my-home-lan/698a83aeb50f22480228f01c)