Software Engineer · São Paulo, Brazil

João Victor

I'm a self-taught software engineer based in São Paulo. Over the last few years I've built digital products end to end. I work across design, engineering, and business, shaping what a product should be, building it, and getting it into production. What I love most is crafting experiences that make people feel something.

I write about software, product, architecture, and how to ship products with AI that have craft, quality, and simplicity at their core.

Outside of work, I like to learn languages, watch TV shows, play online games and appreciate some quiet time offline.

At the moment, I'm working as a Software Engineer at Loadpass. Scroll down to see my projects and articles.

Projects

Writings

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Handling Error in TypeScript

Why throwing is a blind spot in a typed language, and how modeling failure as a value — with a Result type and discriminated unions — makes errors part of the contract.

May 28, 2026

Functional Programming in JavaScript

Not monads and category theory — just the handful of functional ideas that make everyday JavaScript easier to read, test, and trust.

May 12, 2026

Color theory for front-end developers

A practical take on color for the web — why perceptual models like OKLCH beat hex and HSL, how contrast actually works, and how to build a palette that scales.

Apr 30, 2026

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