Katy Lavallee is a Principal Software Engineer with 15 years of experience building full-stack, production-grade web platforms and developer tools, currently shaping the O’Reilly learning platform from Carrollton, Texas. She combines hands-on work across backend and frontend microservices with a focus on developer tooling and internal platforms that help teams ship faster. Her background includes building customer-facing commerce systems and custom Django applications, plus maintaining Ubuntu servers and delivering offline-capable tablet apps—showing comfort with both infrastructure and UX constraints. Katy mentors engineers and emphasizes shipping software that makes users’ lives easier, not just elegant code. She has a practical, product-oriented approach honed by running a web consultancy and moving teams from PHP to Django. Colleagues know her as the kind of engineer who equally values developer ergonomics and measurable user impact.
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