Work

Real work, with names and with code.

Projects delivered to clients and tools of my own. Each one links to its full case study and, where possible, to the code or the live version. The case studies are in Spanish; the code speaks for itself. What I do as QA at my day job doesn't appear here: that work belongs to my employer.

01 · For clients

Systems someone else uses every day.

Two quoting tools for installation companies and the redesign of a corporate database. Businesses that ran on notebooks, chats and spreadsheets, and don't anymore.

Web appClient

PHP · MySQL · PDO · BootstrapQuotes in minutes, not by hand

Mallas Trujillo

A quoting system for a safety-netting company: editable rates, live calculation, searchable history and PDFs from the browser. The quote comes out the same whoever prepares it.

Case study → Code →

Web appClient

PHP · MySQL · PDO · jQueryClient records nobody types twice

Mi Malla

A quoting tool for another installation company. You search for the customer by name, their details load on their own and never get duplicated. Calculations run on the server and each user logs in with a role.

Case study → Code →

DatabaseClient

E-R model · normalization · proceduresFull redesign of a corporate database

GESTKOR

Redesign of the database behind a retail maintenance management system: data model, normalization, stored procedures and query tuning.

Case study →

02 · My own products

What I build when nobody asks me to.

Tools I made to solve a problem of my own. Some are live, others are demos or still in development, and each card says which.

Web app · liveOwn

Cloudflare · OAuth · multi-provider AISix messaging channels in one inbox

GeroHub

An automation suite for businesses. Its first app brings six messaging channels into a single inbox and uses AI to flag what needs an answer first.

See it live → Case study →

Web tool · liveOwn

HTML · JavaScript · a single fileRoot cause without drawing the diagram

Ishikawa Creator

Builds a cause-and-effect analysis as a nested structure instead of a drawing. Save and resume in JSON. No install, no account. Open source.

Try it → Code →

Android · Wear OS · demoOwn

Kotlin · Jetpack Compose · RoomThree left, instead of a dollar amount

Plenty Tap

Tracks recurring spending by number of uses, not by amount. One tap from the phone or the watch, and it works offline. Demo build, not published on the Play Store.

Case study →

Desktop · in developmentOwn

C# · .NET · MIT licenseSix clicks down to one

Display Preset

Saves complete monitor setups (resolution, refresh rate, order and position) and switches between them from the Windows system tray. Open source.

Code → Case study →

Your project

Does your case look like one of these?

If you have a site, start with the $150 audit and I'll tell you what to fix first. If you don't, a website runs $600 to $900 at a fixed price. And if you need a tool like the ones above, from $1,200.

Tell me about your project → See pricing