I Got Bored and Ended Up Automating the Whole Process

In my edtech bootcamp, I manually called mentors for a full-stack role. Same 4-6 questions every time, then manual back-and-forth for scheduling. It was eating 3-4 hours a day. So I decided to automate it. Here's what I ended up building - a voice AI agent I'm calling the Mentor Screening Agent. What it does: 1. Calls the candidate 2. Asks 4-6 screening questions (years of teaching experience, JS/React/Node knowledge, expected hourly rate, etc.) 3. If they're over budget, transparently share the cap and ask if they accept 4. If the candidate qualifies the screening round - book the interview slot, and send a Google Calendar invite with a Meet link 5. Logs every call to a Google Sheet for review The pipeline: Voice call → Webhook → Google Sheet → IF (qualified - candidate pass all criteria?) → Gmail → Google Calendar The voice part uses Dograh (open-source voice AI); everything downstream is n8n. Both free open source and self-hostable. What happened after I built it? I went from 4 hours of screening calls a day to about 30 minutes of reviewing the output sheet. Qualified candidates have their interview booked before I even know they exist. A few things that broke along the way and might save someone a debugging headache: \- $json.body.X\` becomes \`$json. X after data passes through a Sheets node (it flattens the body wrapper) \- Workspace Google accounts often won't let you create Calendar events via OAuth without admin approval. Personal Gmail credentials just work. \- Conference Data toggle in n8n's Calendar node throws a useless "Bad Request if partially configured. Either fully set the type or remove the section entirely. Let me know if you have any feedback on this approach.