Jero Sanchez
Software Engineer. Building things that matter.
Welcome back!Here you have the latest
chapter of my story, ready for the curious mind. Grab a seat, get comfortable, and let’s see
what new twists are on the table today:
Closing the Loop: Why I'm Building the iOS Client for ClickNBack
What happens when you've spent a couple of months building a production cashback backend and realize you're the same person who once built its iOS client at a real company?
Read more ⟶The Rest Of The Story:
Catch up on the chapters that brought me here.
What Two Years in the Backend Taught Me: It Wasn't What I Expected
What happens when you come to learn backend and discover that what you actually learned was something about yourself?
Read more ⟶Behind the Buzzword: What Real AI-Assisted Engineering Actually Looks Like
What happens when a recruiter suggests you add an AGENTS.md to show you're using AI—and the AI infrastructure was already there, just not in the shape the industry learned to look for?
Read more ⟶Ownership Changes What Counts as a Skill: The Complete Loop
What happens when you realize that knowing a system is different from owning it—and that owning it completely changes your credibility?
Read more ⟶Structured to Scale: The Architecture Call Most Teams Get Wrong
What happens when you build a financially complex backend from scratch and face the monolith-versus-microservices question before you've written a single domain model? The reasoning behind that choice is where senior judgment shows up.
Read more ⟶The T-Shaped Fallacy: It's Not About Coverage
What happens when you realize that being T-shaped isn't about touching everything—it's about knowing where to go deep?
Read more ⟶Fluent in Two Weeks: The Stack Is No Longer the Moat
What happens when you ship production-grade Python after years in Swift, Java and Elixir? The question isn't how fast you can learn a new language anymore—it's whether you have the judgment to know what to build with it.
Read more ⟶The Coding Market's New Stratification: Why Depth Alone Isn't Enough Anymore
What happens when AI redraws the lines between junior, mid, and senior roles—and makes depth-only specialization suddenly vulnerable?
Read more ⟶Owned in Production: How AI Can Be Your Best Friend or Your Worst Enemy
What happens when an AI-assisted runbook ships a critical security gap into production—and the same AI helps you close it in thirty focused minutes? A story about professional incident response, cryptominers, and why human judgment is the difference between AI as a force multiplier and AI as a liability.
Read more ⟶The Bug AI Cannot See: How Keeping Humans In The Loop Saves Real Money
What happens when a senior engineer spots what 500+ tests and a green pipeline completely missed—not a missing line, but a missing abstraction? Here's why that judgment cannot be delegated to an AI, and why patching your prompts won't save you.
Read more ⟶