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Lenny's Podcast1h 38m

Building the most AI-pilled engineering team in the world | Fiona Fung (Anthropic)

TL;DR

  • Anthropic's code output jumped 8x, so verification became the new bottleneck: Fung says the hard part is no longer producing code but checking quality, impact, and user experience as engineers, PMs, and designers all start committing code.

  • Managers are using Claude as an operating layer, not just a coding tool: Fung runs Claude sessions across repos, Slack feedback, and metrics so monthly reviews become evidence-based conversations about outcomes, bugs, and themes instead of anecdotal status updates.

  • The strongest hires now fall into two buckets: Anthropic looks for creative builders with product sense and deep systems experts who can verify the hard parts, especially in distributed systems and other trust-but-verify domains.

  • High agency is the team norm, but only with high accountability: Fung wants people to take initiative, propose hypotheses, and ship boldly, while staying responsible for what broke, what worked, and whether the work actually mattered.

  • AI can make engineering lonelier, so Anthropic is adding human rituals back in: After noticing people were mostly working solo with agents, the Claude Code team started pairwise programming lunches and hackathons to share workflows and keep team energy up.

  • Fung is most worried about the next generation of engineers: If models abstract away more code over time, she thinks the big open question is how newcomers still learn architecture, dependencies, and deep technical intuition, possibly through more apprenticeship-style paths.

The Breakdown

Anthropic engineers now ship 8 times more code per quarter than they did a few years ago, and Fiona Fung says the real bottleneck is no longer coding but verification, product judgment, and team culture. Her playbook for an AI-native engineering org is simple but demanding: everyone becomes a builder, managers stay hands-on, and high agency only works when it comes with high accountability.

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