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
WestCo App Studio · est. 2023

I build software
for the few who want it built right.

A one-person studio in West Covina, CA. I take on a small number of iOS and web app builds a year. The rest of the time I am working on my own.

01

What I build.

iOS apps

SwiftUI, App Store launches, real users. From "I have an idea" to "it is on TestFlight" in weeks, not quarters.

Serverless web apps

AWS-native backends with CDK, Cognito, Lambda, DynamoDB. Cheap to run, fast to ship, boring on purpose.

AI features

Bedrock-backed assistants, classifiers, generators. Designed to earn their keep — not to demo well and then sit unused.

CRM & marketplace builds

The thing two CRMs almost did but did not. Custom, focused, and yours.

02

Recent work.

MedCore Systems

2024 live

Hospital staffing OS — schedules, credentialing, shift fills.

In production with two California hospital teams. Replaced four spreadsheets and a group text.

AWSCognitoLambdaDynamoDBReact
Founder · Engineer

Top Dog Brand — Wholesale Portal

2024 live

Serverless B2B ordering for a retail brand.

Replaced a spreadsheet + email workflow with Cognito-backed accounts, admin tools, and SES order receipts.

AWSCDKServerlessStripeShopify
Founder · Engineer

Vertx CRM

2023 live

Solar sales intelligence CRM with property analysis.

A no-nonsense CRM built for SMB teams who were drowning in HubSpot they did not need.

AWSLambdaReactPostgres
Founder · Engineer

MusicYaa

2023 shipped

Latin music artist booking marketplace, iOS-first.

Featured-placement marketplace, paid web-side to dodge Apple's 30% cut. Shipped to the App Store.

iOSSwiftAWSStripe
Founder · Engineer
03

How it goes.

  1. 01

    A real conversation

    A 30-minute call. You explain what you are trying to build. I tell you whether I am the right person for it. No pitch deck.

  2. 02

    A written proposal

    A short doc with scope, milestones, price, and what I need from you. You sign off, or we keep talking.

  3. 03

    Weekly demos

    Every Friday I show you something working. Course corrections happen in days, not months.

  4. 04

    You own all of it

    Code, accounts, infra. I hand you the keys at launch and stay on retainer if you want me to.

If you have something real to build —

Let's talk before the calendar fills up.

One call. Honest answer either way.

Start a project →