Software engineering with rigor, simplicity, and auditable code.

Systems Analysis and Development student. I document studies on programming, software architecture, databases, and hands-on software construction.

Available for internship opportunities

João Pessoa: --:-- BRT

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Engineering Principles

01. Learning in Public Learning in public, without faking experience. Unfinished projects appear as work in progress.
02. Operational Simplicity Avoiding the over-engineering trap. Strict relational modeling in PostgreSQL, separation of rules, and auditable code.
03. Radical Transparency Studies appear as studies. No fictional user counts, invented cases, or results that do not exist.
04. Applied AI, with Judgment AI as an engineering tool, with contracts, tests, and human review.

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Built Systems & Tools

Original software, practical applications, and system prototypes built to practice business rules and real architecture.

01 · 2026 · SaaS Product · Parking Operations

ParkFlow

SaaS for parking operations, with license-plate-driven flow, space control, monthly subscribers, and automations.

STUDY PROTOTYPE · AI-ASSISTED MVP

React TypeScript PostgreSQL Supabase Relational Modeling Plate-driven UX

Demo Technical Journal

02 · 2026 · Local Tool · On-Disk Courses

Local Player

Local/offline player in Node.js + Express + vanilla JS to organize and watch thousands of on-disk lessons, with no build step, portable progress, fallback transcoding, and local Whisper subtitles.

EVOLVING · LOCAL/OFFLINE PLAYER

Node.js Express Vanilla JS FFmpeg whisper.cpp Zero build step

Technical Journal

Engineering Notebook

Full archive (10) →

Recent articles, study notes, and hands-on analysis of programming, databases, and software architecture.

Full archive (10) →

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Sep 19, 2026 · 5 min

Software Engineering Artificial Intelligence

Local Player: transcode fallback and Whisper in a P0-P3 queue

Compatible files play directly via Range. Incompatible ones become fragmented MP4 with 416 seek. Subtitles are an add-on: never await before video.play().

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Sep 19, 2026 · 4 min

Software Engineering Node.js

Local Player: atomic progress that travels with the drive

How writeFileAtomic + serial queue + .bak + .corrupt-<ts> eliminated position loss even when killing the server mid-save.

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Sep 19, 2026 · 6 min

Software Engineering Node.js Vibe coding

Local Player: vibecoding with invariants and zero build step

How a local/offline player in Express + vanilla JS organizes thousands of lessons with no bundler: AGENTS.md as contract, physical structure as source of truth, and scan with on-disk cache.

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Jul 07, 2026 · 3 min

Java JVM Portability