Sergio Fernández

@geiser
2 Followers
7 Following
53 Posts
Staff Engineer.
More than a decade of experience as Software/DevOps engineer in the Streaming/ISP/Managed Services/Hosting/Data Science/Hardware sectors... and still learning every day ♾️
homepagegeiser.cloud
Sergio FernándezMar 21
https://terriblesoftware.org/2026/03/03/nobody-gets-promoted-for-simplicity/ - hits my nerve, suffering for years long the "brilliant" idea of another engineer
Nobody Gets Promoted for Simplicity

We reward complexity and ignore simplicity. In interviews, design reviews, and promotions. Here’s how to fix it.

Terrible Software
Sergio FernándezFeb 16
https://calebjohn.xyz/blog/b2cc/ food for thought
B2CC - Claude Code is your customer

Why AI agents like Claude Code are becoming the most important customers SAAS platforms in 2026 and beyond.

Sergio FernándezOct 26, 2025
Good write-up for tips on code reviews https://www.seangoedecke.com/good-code-reviews/
Mistakes I see engineers making in their code reviews

Sergio FernándezAug 2, 2025
And yes, you're having too many metrics for your system https://staysaasy.com/management/2025/08/02/metrics.html interesting to think about having slots in meetings to really discuss them
You Have Too Many Metrics

What's in a measurement?

Stay SaaSy
Sergio FernándezAug 2, 2025
Yep, those are the managers I look up to https://scottkosman.com/post/blog/so-youre-a-manager-now/
So You're A Manager Now.

Advice for first-time managers from someone who learned it the hard way, cleaned it up, and passed it on.

scott kosman
Sergio FernándezAug 2, 2025
https://hadid.dev/posts/living-coding/ Interesting study
Live coding sucks

Live coding measure stress, not coding skills

Mustapha Hadid
Sergio FernándezJul 18, 2025

The higher you climb the ladder, the more you understand that not every technical issue was really your fault.

If I could go back time and tell that to my younger self...

Now reading the Staff Engineer's Path by Tanya Reilly. It hits deeper than I thought

Sergio FernándezJul 11, 2025
https://leerob.com/vercel Nice recap, we should learn too
5 Things I Learned From 5 Years At Vercel | Lee Robinson

Here are some of the lessons I learned and how I grew as a leader and manager, as well as a bunch of behind-the-scenes photos.

Sergio FernándezJul 9, 2025
Welcome “Agencies”! https://blog.nishantsoni.com/p/from-ai-to-agents-to-agencies-the
From AI to Agents to Agencies: The Next Evolution of Artificial Intelligence

Two years ago, I wrote about the transformative potential of AI Agents - autonomous systems that could break down complex tasks and execute them without constant human intervention.

Nishant Soni
Sergio FernándezJun 21, 2025
Quite the good suggestion - https://news.ycombinator.com/item?id=44294776
Ask HN: How to Deal with a Bad Manager? | Hacker News