Alfred

Alfred makes real phone calls on your behalf — booking appointments, rebooking reservations — with live Google Calendar context, interrupt handling, and automatic calendar updates. Managed to push latency below 1.2 seconds.

Role

Built end-to-end as a solo project — voice pipeline, agentic workflow, Google Calendar integration, and web interface.

Challenge

Getting conversational latency below 1.2 seconds while maintaining natural-sounding responses and reliable interrupt handling was the core engineering challenge.

Outcome

A working voice AI agent that handles real phone calls end-to-end — books appointments, reschedules reservations, and updates your calendar automatically.

Technologies used:

Next.js
Node.js
Hetzner Cloud
Claude
OpenAI
Shadcn UI
VAPI
Langfuse