Javier Guzman's Newsletter (Page 2)

Cilium Breadcrumbs 1

February 03, 2026

For the ones who don't know, Cilium, it's a CNI i.e. Container Network Interface. For mere mortals this means it's the guy who handles the network stuff within Kubernetes. As you can imagine Kubernetes was built with flexibility in mind, so really a lot of the features it has are plug a

More about requests IDs

July 14, 2025

Previously we have mentioned about requests IDs to avoid mutating the backend state twice due to a network problem for example. Article link here https://blog.guzman.dev/the-problem-about-api-retry-requests/. But there is more about it. Have you ever wonder how observability is done in big systems?

Your backend takes too long to answer

June 18, 2025

One thing I've observed is that people make APIs like they are a ping-pong game. Literally they design all endpoints to respond "as soon as possible". So for every request that arrives to the server, you process it and then reply with the response. All of this is good most of the time

The problem about API retry requests

Backend

May 21, 2025

Probably you were doing this mistake in your backend. So you have your web app whatsoever that makes requests to your backend. When things go wrong and there are network connection problems, there are two possibles scenarios. First scenario, it's where your requests might not arrive to the bac

Is your database or backend doing strange or unexpected things?

Backend Database

May 14, 2025

Welcome to race conditions Imagine you are about to eat a piece of cake, your fork is going closer and closer to your mouth, when suddenly, you are called and you switch your attention to somewhere else for a few seconds. Then when you are back on track, you realise a kid has eaten your cake. Damn

Are AI leaders bad for the humanity?

AI

April 07, 2025

I was listening a podcast where one of the most influential persons in the world of AI was interviewed. They talked about stuff like the origin of Earth, humanity, etc. and even the possibility of life in other planets. What caught my attention is that it was all reduced to science or computation.

Is someone building something like this for AI?

AI

April 01, 2025

One flaw that AI has right now is the lack of full context. Not being aware of the whole context makes the AI err because it simply doesn't know better. The more context you give the more correct the output is. Easy right? That's why stuff like debugging is hard right now for AI because so m

What it's technology readiness level and how it could impact AI adoption

AI

March 22, 2025

Even though I believe AI is going to plateau before the next real jump in the technology, I think there is still more room for AI usage before that happens. This is due to TRLs, technology readiness levels. In some big corporations, normally the adoption of a new technology is not done quickly nor