About

I am Jonathan Haas. I work on AI systems, code review, security, developer tools, and the habits that make fast work easier to inspect.

Now

I am building EvalOps. The focus is practical: catch regressions, measure quality, and make changes easier to inspect.

Background

I previously co-founded ThreatKey and worked at Vanta, Carta, and Snap. The through line has been security, infrastructure, developer tooling, and the details that decide whether fast systems hold up.

Writing

I write about AI code review, evals, security, infrastructure, product judgment, and the management habits around engineering work.

Elsewhere

Usually in San Francisco. Best reached by email. I am also on GitHub, X, and EvalOps.