Eliminating Database Lookups with Auth0 Custom Claims
How to enrich JWT tokens with user data during login, eliminating per-request database lookups while keeping your domain logic decoupled from your identity provider.
Michael Pellegrin
Independent Software Consultant
I help companies build, modernize, and ship software faster. Whether that means standing up a new cloud platform, evolving a legacy system, or accelerating a team that has hit a wall, I bring 20 years of hands-on engineering to get it done. If you need systems designed, problems untangled, or teams moving predictably, I can help.
I have been building cloud-native systems in Colorado since 2006. Before that, I studied digital art and telecommunications at University of Louisiana at Lafayette, which turned out to be an unconventional but useful path into software engineering. Twenty years later, I am still here, still building software, and still showing up every two weeks for the same tabletop RPG group I started with back then.
Recent Writing
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Stop Returning HTTP 200 for Failures: RFC 9457 Problem Details in ASP.NET
HTTP already has error semantics. RFC 9457 Problem Details gives your error payloads a standard structure to match. Here's why it matters and how to implement it in ASP.NET Web API using middleware.
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My AI Development Everyday Kit
Everyday kit is not just for gear people. Here's my current AI development workflow, an honest account of what it replaced, and why I'm already working on the next version.