Senior full-stack TypeScript engineer with six years building production systems, from React front-ends to Node services and the APIs, data models, and types that connect them.https://seanleken.github.io/https://seanleken.github.io/writing/how-to-use-claude-code-effectively/https://seanleken.github.io/writing/how-to-use-claude-code-effectively/Practical strategies for getting the most out of AI-assisted development, from project setup to complex refactors.Tue, 24 Mar 2026 00:00:00 GMTaiworkflowhttps://seanleken.github.io/writing/building-scalable-infrastructure/https://seanleken.github.io/writing/building-scalable-infrastructure/Lessons from architecting event-driven systems that keep their contracts honest from the database to the client.Sun, 01 Feb 2026 00:00:00 GMTarchitecture