EST. 2024 · A BUILDER'S LOG
TUE, MAY 26, 2026 · WEST COVINA, CA
LOUIS
CASTAÑEDA
Software, strength & intelligence.
Notes from a team of one.
VOL. II · NO. 14 SHIPPING IN PUBLIC SGV · CA
Build · The Lead

Why I bet my client work on an all-AWS stack

Bedrock, Lambda, DynamoDB, OpenSearch. The case for going native when you are a studio of one and cannot afford to babysit infrastructure.

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What I am building, what I am lifting, and what I am betting on. No fluff, no filler, unsubscribe whenever you want.

Currently
  • BuildAn AI wellness companion, iOS — in active development
  • BodyGrinding from a 220 to a 225 bench
  • MindTeaching middle schoolers to actually use AI

The Log

Latest entries · newest first
№ 011
Body

220 to 225: the last five pounds are a head game, not a strength game

Micro-plates, heavy holds, and the uncomfortable truth that the barrier was sitting between my ears the whole time.
MAY 106 MIN
№ 010
Mind

I read prediction markets like a news feed now

Kalshi changed how I think about probability and geopolitics. My morning routine, and why the odds beat the headlines.
MAY 037 MIN

Three Threads

What this place is about
01

Build

Software, client work, and the studio. What it actually takes to design and ship real iOS and web products as a team of one.

02

Body

Strength and recomposition, tracked. The training, the data, and the unglamorous discipline behind getting leaner without guessing.

03

Mind

AI in practice, not in theory. Teaching it, building with it, betting on it, and thinking out loud in public.

WestCo App Studio

I take on a small number of builds a year.

I design and ship iOS and web apps for founders and businesses who have something real and want it built right. If that is you, let us talk before the calendar fills up.

iOS & SwiftUI · AWS-native backends
AI features · CRM & marketplace builds
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Software, strength, and intelligence from a team of one. Roughly weekly. The same notes that end up here, sent before anyone else sees them.

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