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Builders & open source

Erik Gafni

Founder and CTO, TypeSafe AI

Erik Gafni is a founder and the CTO of TypeSafe AI, a San Francisco company that builds System One models for typed, probabilistic decisions in software automation. TypeSafe's team page describes Gafni as a repeat founder, including of Ravel, a multimodal AI company for DNA sequencing, as an early employee at Invitae and Freenome, and as a specialist in building production AI systems.1

At a glance

Current role
Founder and CTO
Sector
Company
Work listed
1
Sources cited
2
Profile reviewed

Career

Gafni's earlier roles include founding Ravel, which worked on multimodal AI for DNA sequencing, and early positions at Invitae and Freenome; TypeSafe's team page also credits Gafni with publications and patents. Gafni is one of TypeSafe's three founders and serves as CTO, alongside CEO Diogo Almeida and COO Sasha Sheng.1

TypeSafe launched Jev in September 2026, describing a new model architecture, a parallel sampler and a calibrated-decision training method built for automation rather than chat.2

Work and contributions

  • TypeSafe AI System One models (Jev) Proprietary product

    Part of TypeSafe's founding team as CTO when the company launched its first System One model, Jev, in early access in September 2026.12

Timeline

  1. TypeSafe AI, where Gafni is a founder and CTO, launched its first System One model, Jev.21

Other documented roles

Roles the sources document that are not confirmed as current.

  • Founder (past), Ravel1
  • Early employee (past), Invitae and Freenome1

Where they work

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References

2 sources · profile reviewed Oct 22, 2026 · data updated Oct 22, 2026

  1. Team — TypeSafe AITypeSafe AI · Official page · accessed Oct 22, 2026
  2. Introducing System One Models & Jev — TypeSafe AI BlogTypeSafe AI · Announcement · published Sep 15, 2026 · accessed Oct 22, 2026