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Carlos Fuentes

Carlos Fuentes

My name is Carlos Fuentes and I am a Software Engineer with experience in designing cloud-native architectures, distributed systems, and IAM. Actively open-source contributor and maintainer of Fastify, Undici and Piscina, and currently employed at Auth0/Okta as a Senior Software Engineer.
Auth0, Netherlandsmetcoder95metcoder95charlie-fuentesmetcoder.dev
Interests:
devtoolstoolingscalabilitydevopsjavascriptnode.jsdesign systemstypescript
Beyond Rubber Ducking - Engineering in Times of AI (LLMs)
TechLead Conf London 2026: Adopting AI in Orgs EditionTechLead Conf London 2026: Adopting AI in Orgs Edition
Upcoming
Beyond Rubber Ducking - Engineering in Times of AI (LLMs)
We used to explain our bugs to rubber ducks. Now, the duck talks back, writes code, and occasionally lies to our faces.

LLMs are incredible tools. They can cure "blank screen syndrome," instantly write boilerplate, and explain weird legacy code. But treating them like senior engineers is a massive trap. They hallucinate confidently, lose track of the bigger picture, and make it dangerously easy to deploy code you don't actually understand.
productivity