Pablo Fernández Ruiz

Software Developer

I'm a software developer focused on developer tools and data systems. I care about performance, design, and building products that feel solid and intentional, from backend to the final user experience.

I'm currently working on several projects, including Horizontables, a desktop tool for modern data engines, and I have a keen interest in web scraping.

You can find my code on GitHub, reach me on @pablofdrz, or write me to email. Always open to conversations about engineering and thoughtful product building.

Selected Projects

Recent Thoughts

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Giving an Inbox to Each Agent

Password resets, invoices, and support replies still arrive by email, and my agents live on HTTP. Mailingest is the Rust mail platform I built so that an inbox costs one API call: an address whose mail shows up as a signed webhook.

RustEmailSMTPWebhooksAgents
Building a Better WhatsApp SDK

whatsapp-web.js runs a whole headless Chromium to act like a phone. The other door skips the browser and speaks WhatsApp's native protocol over a plain WebSocket, then hands you a raw socket and a firehose of events. whatsweb is the thin layer I built to make that socket feel like a bot.

WhatsAppBaileysTypeScriptBotsSDK
The Distance From a Message to Your Code

The same bot, a user's message answered by code I wrote, costs a handful of lines on Telegram, a gateway and a bag of intents on Discord, and a whole headless browser pretending to be a phone on WhatsApp. Four libraries in, the pattern was clear, and the hard part was never the bot.

BotsDiscordTelegramWhatsAppTypeScript