Katelyn Lesse
I currently lead Platform engineering at Anthropic. I previously led Connect engineering at Stripe and product engineering at Betterment. I'm from New York and currently based in San Francisco.
Writing
- You can't avoid the hard part2026-07-05
Can you avoid the hard part and still succeed? If the answer is no, the safe path is just delaying failure. You have to take the big swing.
- The testing pyramid still holds2026-04-01
The testing pyramid still holds. How we interpret it and the intention we put into following it matters now more than ever.
- The human + agent software team wins2026-02-16
The companies that win will have humans doing what humans do best and agents doing what agents do best.
Speaking

Pragmatic Engineer: How building software is changing at Anthropic
2026

Training Data: Building an Ecosystem, not a Walled Garden
2026

Anthropic: Building the future of agentic infrastructure
2026

Engineering Leadership: How Anthropic builds AI-native engineering teams
2026

WildHearts: Not the Anthropic you're expecting
2026

In the Blink of AI: Using AI at its exponential
2026

AI & I: The secrets of Claude's agent platform
2026

AI Engineer Code Summit: Evolving Claude APIs for agents
2025

Anthropic: Building the future of agents with Claude
2025

Stripe Sessions: Accounts v2
2025