I built a product and hit the wall every founder hits: leads were coming in and everything after that was manual. Saving them, emailing them, deciding who deserved a personal follow-up. I'd never built a business system before, and doing it by hand doesn't scale past day one.

An n8n workflow that scores every application high or low ticket in real time. Low ticket goes to the sheet and an automated email sequence. High ticket triggers an instant iMessage from an AI agent through a custom messaging server. Someone who abandons the form halfway still gets saved and receives a recovery email. Every lead lands in the CRM with zero manual entry.

Webhook security. An open webhook on the internet will get spammed or abused. Every endpoint validates a shared secret stored in an environment variable, so nothing fires unless the request proves where it came from. Same pattern on the iMessage endpoint, because without it, anyone could post to it.

Leads process with zero manual entry, and my time goes to the ones that actually matter. The pattern generalizes to any intake flow: applications, bookings, support.