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Lenny Rachitsky Interviews Simon Willison on AI Engineering
Lenny Rachitsky Interviews Simon Willison on AI Engineering
 ### Lenny Rachitsky@lennysan
Good work @simonw
#### Lenny Rachitsky
@lennysan · 1d ago
"Using coding agents well is taking every inch of my 25 years of experience as a software engineer."
Simon Willison (@simonw) is one of the most prolific independent software engineers and most trusted voices on how AI is changing the craft of building software. He co-created Django, coined the term "prompt injection," and popularized the terms "agentic engineering" and "AI slop."
In our in-depth conversation, we discuss:
🔸 Why November 2025 was an inflection point
🔸 The "dark factory" pattern
🔸 Why mid-career engineers (not juniors) are the most at risk right now
🔸 Three agentic engineering patterns he uses daily: red/green TDD, thin templates, hoarding
🔸 Why he writes 95% of his code from his phone while walking the dog
🔸 Why he thinks we're headed for an AI Challenger disaster
🔸 How a pelican riding a bicycle became the unofficial benchmark for AI model quality
Listenyoutu.be/wc8FBhQtdsAEIyOehU8 Show More
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Apr 4, 2026, 2:35 AM View on X
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2,373 Views  Lenny Rachitsky @lennysan
One Sentence Summary
Lenny Rachitsky shares a deep-dive podcast episode with Simon Willison discussing the evolution of AI coding agents, agentic engineering patterns, and the future of software development.
Summary
This tweet promotes a podcast episode featuring Simon Willison, a prominent software engineer and AI commentator. The discussion covers critical topics for modern developers, including the 'dark factory' pattern, the risks to mid-career engineers, and practical agentic engineering techniques like red/green TDD and hoarding. It provides valuable insights into how AI is fundamentally changing the software development craft.
AI Score
83
Influence Score 2
Published At Today
Language
English
Tags
Simon Willison
AI Engineering
Agentic Engineering
Software Development
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