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Writing

Technical articles, insights, and lessons learned from building software systems. I write about architecture decisions, engineering practices, and the challenges of delivering reliable software at scale.

Showing 21–25 of 45 articles

January 28, 2023 Understanding JWTs More Deeply I've been using JWTs for authentication, but now I'm learning how they actually work and their security implications.
jwtauthenticationsecurity
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December 8, 2022 Finally Understanding CORS CORS errors frustrated me for months. Now I'm understanding what CORS is and how to handle it properly.
corsbackendsecurity
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November 20, 2022 Understanding JavaScript's 'this' Keyword The 'this' keyword confused me for so long. I'm finally understanding how it works and why it behaves the way it does.
javascriptfundamentalsthis
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October 28, 2022 Finally Understanding JavaScript Closures Closures confused me for months. Now they're finally clicking and I'm seeing why they're so powerful in JavaScript.
javascriptfundamentalsclosures
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September 14, 2022 Really Understanding Promises I thought I understood promises, but I'm learning there's more depth to them. Promise chaining, error handling, and Promise methods are clicking now.
javascriptasyncpromises
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© 2026 Andres Alpiri
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