JMS

Jose Sabater

AI Engineer at Opper. Building agents, breaking agents, improving agents.

Stockholm · 59.33°N

Currently

At Opper, working on the API Gateway and Agents. My hobby project: Embassy.

Work

  • The Scribe — Hand it a recording, a video, or a rough transcript and it returns a clean summary, posted straight to Notion. Whisper hears the words, an LLM finds the gist, and it can tell the speakers apart.
  • The Listener — A quiet companion for clinicians during a consultation. It transcribes the session, tells the voices apart, summarises what was said, and suggests next steps. Works across languages.
  • Voices — Speaker diarization, word by word. It matches every spoken word to the person who said it, rather than guessing in broad strokes.
  • The Roundtable — Ask one question and let 200+ AI models answer and debate it. A way to watch many minds agree, disagree, and surface a considered view. Built at Opper.

Seen as paintings in the gallery.

Writing

  • On evals that survive contact with production (soon)
  • Notes from building an agent SDK in two languages (soon)
  • What I learned moving 50M rows for an airline (soon)

Path

  • Venezuela (born) — Born to Spanish parents with an adventurous streak.
  • Florida (childhood) — The family moved to the US when he was young.
  • Tenerife (grew up) — Grew up in the Canary Islands. Deutsche Schule Teneriffa.
  • Madrid (2010 → 2016) — BSc Aerospace Engineering, UPM. First job at Accenture (Airbus MRTT).
  • Linköping (2016 → 2018) — MSc Industrial Engineering & Management.
  • Södertälje (2018 → 2024) — Scania: project leader, then innovation engineer, then data scientist.
  • Stockholm (2024 →) — Data scientist at SAS, then AI Engineer at Opper. Home.

Elsewhere

jose sabater · stockholm · 2026