Projects

Side projects I build to stay close to implementation. Most start as an itch I can't scratch at work, something I want to use myself, or a methodology I want to understand by shipping it.

  1. Ink-on-bone engraving: a magnifying glass and a small balance scale resting over an open page of ruled text with indigo margin marks, and a footpath drawn into the page dissolving into nothing — instruments of discernment reading a text critically.

    Live

    Jiddu

    Six tools for reading critically: fallacy detector, fact-check, neutrality assessment, AI-slop detector, paper explainer, and an adversarial review that audits a manuscript's claims, experiments, prior work, and fit for its target venue.

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  2. Ink-on-bone engraving: on the left, a messy desk sketch of sticky notes, a rough flowchart, a funnel, and a pencil; a single indigo thread travels right through three neat specimen plates holding the same shapes catalogued with blank label tags, ending in a solid indigo node — the work you already do, given names.

    Published

    Você Já Faz Product / You Already Do Product

    A book on turning practical experience into the professional language of Product Management: the vocabulary and frameworks for the product work you already do. Free to read as an interactive web edition, in Portuguese and English, with search, dark mode, and PDF export.

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  3. Ink-on-bone engraving: a refinement pipeline read left to right — a scatter of raw data-marks funneled through a sieve into a tidy star-schema lattice, which splits into an indigo thread rising to a bar-chart dashboard and another passing through a decision tree, the two converging on a balance scale that tips — raw data distilled, modeled, and resolved into one prediction.

    Academic

    Predicting Negative Reviews in the Olist Ecosystem

    My capstone for a Database Technology degree at PUCRS: an integrated BI + machine-learning pipeline on the Olist e-commerce dataset that predicts which orders will earn a negative review. CRISP-DM, a SQLite star-schema warehouse, four Plotly dashboards, and Random Forest vs Logistic Regression — delivery delay alone drives ~52% of the signal.

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  4. Ink-on-bone engraving: on the left a rigid fixed column of identical question-cards drawn faint and grey; on the right the same cards form a branching decision tree with a single indigo path forking at each node and converging on one target node at the bottom — a fixed form versus an adaptive path that narrows to the answer.

    MVP

    Adaptive Interview Engine

    A form asks everyone the same questions; this asks the one that most reduces its uncertainty about you. Each question is a measurable asset, scored by information per cost — a Bayesian, self-optimizing interview that stops once it is confident enough. Content-agnostic across 21 domains.

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  5. Ink-on-bone engraving: a vintage bellows camera on a tripod facing a long unspooling scroll of ruled paper, both enclosed in a faint circle with a small padlock on it — a script flowing to a lens, sealed so nothing leaves.

    Live

    Tele-prompter

    Free, client-side teleprompter for the browser. Webcam background, MP4 recording with audio, nothing ever leaves your machine.

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  6. Ink-on-bone engraving: a grid of studio mats with small figures mid-pose, one mat conspicuously empty, and a single indigo line arcing in to guide a new figure toward the open spot — an empty place being filled.

    Live

    Turma Completa

    Class-management platform for limited-capacity studios (pilates and the like): attendance, absences, make-ups, and automatic waitlist notifications by SMS/WhatsApp. Won Pitch Day at PUCRS.

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  7. Ink-on-bone engraving: a finely ruled grid sheet of spacetime sagging into curved wells around heavy spheres, with a single indigo geodesic line bending as it sweeps past the masses — curvature drawn as a deformed grid.

    Live

    Gravitational Well 3D

    Interactive 3D visualization of General Relativity. Volumetric spacetime grid deformed in real time by a GLSL vertex shader, with up to 8 masses, gravitational waves, and test particles following geodesics.

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