---
title: "Fernando Castellanos (@masitecno) | Hashnode"
description: "Practical notes from a backend developer debugging real-world systems. Read the latest articles by Fernando Castellanos on Hashnode."
url: "https://hashnode.com/@masitecno"
---

@masitecno

# Fernando Castellanos

@masitecno · Joined June 2026

Practical notes from a backend developer debugging real-world systems.

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