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    Matthew Castrillon-Madrigal

    $ whoami

    Matthew Castrillon-Madrigal

    Lead Developer · platform engineering × AI-native architecture · real-time UIs · calisthenics as the lens

    This is a knowledge garden, not a blog. Notes start as seeds 🌱, grow 🌿 and, with enough tending, become evergreen 🌳 — all linked, the way I actually think.

    notes
    104
    topics
    7
    links
    335
    skills unlocked
    131
    last tended

    Recently tended

    all notes →

    Case studies

    all work →

    $ nowOct 2026

    Life. I became a dad this year, and it has changed what I learn and how. Time comes in smaller, less predictable blocks, so I'm ruthless about fewer, sharper priorities, short focused sessions over long ones, and systems that let me pick a thread back up after a broken night.

    Work. Leading front-end development at a fintech building real-time crypto trading interfaces. Most of my thinking goes into keeping fast-moving UIs smooth and predictable: decoupling rendering from the data feed, holding 60fps under a firehose of updates, and making click-to-trade flows feel instant without cutting corners on quality.

    Thinking about. Platform engineering for an AI-native world. What a golden path looks like when coding agents walk it alongside people; how evals, tracing and sandboxes become platform capabilities rather than afterthoughts; and how to design platforms that both people and agents can trust.

    What I’m focused on →

    $ radar

    24 items · 11 adopt · 3 trial · 7 assess · 3 hold

    My tech radar →

    $ ./lab --train

    Calisthenics Lab

    A library of 42 calisthenics skill families: 131 progressions unlocked, 18 current goals — and the engineering lessons hiding in progressive overload, deloads and balance.

    Open the skills library →