WhoBuilt

Kelvin French-Owen

worked on the Codex web project at OpenAI

Former OpenAI employee who worked on the Codex web project and co-founded Segment.

Key facts

Founded
Roles
OpenAI, worked on the Codex web project
Uses
Codex, for code review
Claude Code, daily driver at the time of the conversation

Career

  1. OpenAIcurrent
    worked on the Codex web project
  2. Founder

Timeline 2

Dated events, newest first. Open the sources under any item.

How we verify
Founded1Career1
20262 events
  1. reported 2026-02Founded
    Kelvin French-Owen founded Segment
    “before that he started Segment” 0:54
    Unverified1 source· Talk
  2. reported 2026-02Career
    Kelvin French-Owen is worked on the Codex web project at OpenAI
    “when I was at OpenAI, I was working on the Codex web project” 2:07
    Unverified1 source· Talk

Talks 1

45:59
We're All Addicted To Claude Code

The talk explores why coding agents such as Claude Code and Codex feel transformative, focusing on context management, terminal-based workflows, and the trust needed to delegate work. Kelvin French-Owen shares lessons from building Codex: keep agent context relevant, provide ways to check results, and understand how a codebase’s structure shapes what agents produce. The speakers discuss how coding agents may change software teams, product design, and the skills engineers need, while noting limits around long-context tasks, verification, and security. They also consider how open source, developer tools, and products such as Segment may evolve as agents make implementation cheaper.

Feb 6, 2026· 46 min 0:54