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I build what users never see.
Currently at Tax Maverick.

I'm Sean Aguilar, a software and computer engineer in Cebu. Four years on full-stack systems and agentic AI, and a standing curiosity about the hardware and security holding it all up.

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Rooms I show up in

Current focus

Two questions I keep chasing.

  • Day to day

    What makes an agent worth keeping around after the demo?

    I work on agents, skills, and plugins that hold up inside a real workflow, not a scripted one.

    Agentic AI platforms

  • After hours

    What happens to correct software when the silicon underneath leaks, or gets pushed on purpose?

    I dig into side-channel attacks and fault injection to learn how both are defended.

    Hardware security

What I hold to

Ship it. Check the AI. Hand it forward.

Three habits that survived four years of shipping: get it in front of people, keep a hand on what the AI writes, and pass the useful parts on to whoever needs them next.

  • Ship it.

    Real things, in front of real users. Most of my work sits under the interface: system design, backend architecture, and the DevOps that gets it deployed.

  • Check the AI.

    It's a collaborator, never the last word. AI gets me through repetitive work and dense systems faster, then I check what it produced against how production actually behaves.

  • Hand it forward.

    I mentor developers, run technical workshops, and stay active in Cebu's communities. Teaching sharpens the work, so it isn't a separate track for me.

The work

A few things I shipped.

Client platforms and solo builds, from booking systems to a crop simulator. Swipe through a few here, or read the full list with the role, stack, and outcome for each.

01 / 04

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The part I care about starts after the demo. I've cut manual data entry by 70%, lifted engagement 60%, and pulled 30% off load times — but the number I'd defend is whether the next person can still read the thing and change it without fear.

About

How I got here.

I started building for the web in high school, then spent the summer before college finding out how software actually gets shipped. Until then I'd assumed syntax was the finish line.

From first year on, freelance gigs, side projects, and three years at Today's Carolinian turned into production systems, mentoring, student leadership, and two engineering jobs alongside my Computer Engineering degree. At Tax Maverick now, refactoring systems and building a RAG and conversational AI feature for tax assessments.

Same throughline the whole way: understand the problem, build the useful thing, stay curious about whatever sits underneath it.

Got something to build?

A product to ship, a system that needs untangling, or an idea you want to think through out loud — email reaches me fastest.

Email me Read the CV