n8n Retell-Powered Voice Call Assistant

I need a seasoned voice-AI developer to stand up an automated phone agent for Tech Kooks. The agent will answer one SkySwitch number in English, greet callers with a professional intro, then instantly:

REQUIRED - SUBMIT YOUR FLOWSHEET.CO PORTFOLIO

• qualify them as an existing client, new inquiry, support, or billing question
• handle quick FAQs such as hours, services offered, and ticket-submission steps
• route the call to the proper staff member or ring group, or take a voice message and email/SMS the summary when no one is available

Tech stack and integration wishes
• Voice layer: Retell AI is my first choice—sell me on another only if it’s clearly better.
• VoIP: SkySwitch (must keep existing trunk).
• Orchestration: n8n or Make.com.
• CRM: basic logging into HubSpot (caller details, intent, outcome).

Operational rules
– One phone number, business-hours vs. after-hours behavior.
– Simple escalation; no multi-level IVR labyrinths.
– Smooth, attended transfer with a concise hand-off note so my team knows who’s on the line and why.

Deliverables
1. Fully deployed agent connected to SkySwitch.
2. n8n/Make.com workflow or equivalent, clearly commented.
3. HubSpot logging setup.
4. Written documentation so my team can tweak prompts, add FAQs, or change routing later.

If you have deep Retell AI experience and can show quick, clean call demos, let’s talk timelines and hand-off testing.