Product portfolio · Work in progress

Three products.One clear standard.

I design and build local, clear and verifiable tools that solve concrete everyday problems.

Explore
projects

01MiGuardia 02Josefina 03MailCleanup

Starting point

These are not interface exercises. They are products in progress, backed by real decisions, explicit limits and evidence.

Android · Web · Local application

Product · Design · Implementation · Validation

Selected work · September 2026

Three problems.
Three systems.

01 / AndroidV2 core verified · Second layer in progress

Local work planning

MiGuardia

An Android app for planning shifts, hours and reminders without turning working life into a spreadsheet.

MiGuardia 2.0 is a local-first Android product for Private Security, Police, Nursing and Medicine. Its core, calendar, summaries, notifications, home widget and private PDF/XLSX reports have passed their current audits; safe local backup and restore is the next implementation.

Scope: 4 work sectors
Evidence: Core audit closed
Outputs: PDF + XLSX

Kotlin
Jetpack Compose
Room
Android

02 / WebVerified base · Live coverage in progress

Direct, understandable downloads

Josefina

A focused experience where pasting a link and choosing Video or Audio are the only steps that matter.

Built on Cobalt with attribution, Josefina limits its public scope to four target platforms and validates each format before claiming support. Instagram has accepted live evidence; TikTok, YouTube and Facebook remain behind explicit gates. Its Spanish-first “wool pixel” interface is still in preparation.

Flow: Video / Audio
Scope: 4 target platforms
Validation: Offline + live gates

Svelte
Node.js
FFmpeg
API modular

03 / Local applicationMap + Cleanup Study · Synthetic-only

Local Gmail map and safe cleanup

MailCleanup

Understand the inbox before deleting: an explainable map of senders, sources and message flows.

The local Windows product now includes the audited Total Map and Cleanup Study flows over synthetic data. Plans can be frozen, revalidated and canceled, but never executed: live Gmail, OAuth, credentials and write actions remain behind separate safety gates.

Stage: Map + Cleanup Study
Data: Synthetic SQLite
Safety: canExecute: false

Python
FastAPI
React
SQLite

How I work

Building also means
knowing what not to do.

Problem first

Technology comes after understanding the real journey and the product boundary.

Privacy by design

Local data, minimum permissions and closed capabilities until the evidence is strong enough.

Evidence before closure

Tests, audits and explicit states. Pending work is shown; it is never disguised as finished.

Code and process

The work continues
on GitHub.

The repositories bring together decisions, documentation, tests and the technical evolution of each product.

github.com/blackat-systems