The Era of Compound Engineering — Kieran Klaassen, Every/Cora
Solo engineer ships full AI email client to thousands using zero hand-written code in 2025.
“I haven't written a single line of code this year. Um, maybe I haven't even looked at most of it yet. I do ship.”
Kieran Klaassen of Every/Cora describes 'compound engineering' — a workflow where a single engineer ships production software to thousands of users without writing code directly, instead extracting taste and judgment into AI-driven systems that compound over time. He built Cora, a fully agent-native email client, solo using this method starting with Claude Sonnet 3.5. This represents a concrete, shipped case study of the one-person AI-augmented software team model, moving the conversation from theory to demonstrated practice.