MODEL DESIGNER · VOICE & CONVERSATIONAL AI
I design how AI talks to people.
For nearly a decade I’ve designed voice and multimodal assistants: Amazon Alexa, the Astro home robot, and now Meta AI on smart glasses. I design model behavior, define the evaluations that measure conversational quality, and partner with researchers to turn product taste into specs, data, and evals.
WHAT I DO
1 · Model behavior
Response principles, ideal responses, and system prompts that shape how a model speaks.
2 · Evaluation
Rubrics and LLM judges, calibrated against human raters, that set the quality bar.
3 · Real-time voice
Turn-taking, wait-time bridges, earcons, and speech-to-speech delivery.
4 · Prototyping
Interactive voice prototypes with real TTS, used to settle design questions with evidence.
BACKGROUND
Meta · Amazon Lab126 · Smart Design
Inventor on 11 filed patent applications
Portfolio available by request: cbalmes2@gmail.com