Alexandre Kohler kwy404

Alexandre Kohler, Software Engineer and Open Source Contributor

Alexandre Kohler

Senior Full Stack Software Engineer · Open Source Contributor · Brazil

Software engineer from Brazil with more than 10 years of experience in full stack development, focused on backend systems, APIs and microservices. I build mostly with TypeScript, Node.js, Python and PHP, from service design and databases to React and Vue front ends. As an open source contributor, I fix bugs in projects from Meta, React, Vue, Mozilla, Google, Adobe, Apple, Netflix, Shopify, Uber and other organizations, usually in parsers, protocol handling, build tooling and web platform code.

Contributor at

Open source contributions

38 merged pull requests to projects maintained by Google, Capital One, Adobe, Meta, React, Vue, Mozilla, Uber, Tailwind Labs, Valve, Shopify, Apple, Netflix and ByteDance Web Infra, plus the community project Portugol Webstudio.

Google

17 merged pull requests in budoux, bumble, mobly and sentencepiece

Repository	Pull request
google/budoux _{Smart line breaks for CJK text}	fix(py): handle skip nodes placed after the last chunk
	fix(py): don't output end tags for self-closing tags
	fix(py): escape text and attribute values in the HTML output
	fix(py): don't keep skipping after void elements like input
	fix(java): escape text in the HTML output
	fix(java): don't crash on script and style elements
	fix(js): process all top level nodes in translateHTMLString
	fix(js): export thModel
	fix(py): don't drop trailing text with an ampersand
google/bumble _{Bluetooth stack in Python}	Fix CSRC offsets when parsing RTP media packets
	Fix operation data offset when parsing AV/C pass through frames
	Fix value of the DOWN pass through operation id
	Use 4 bytes for the VOCS audio location in the client proxy
	Set the command/event bit correctly in BTSnoop packet flags
	Fix the preferred frame duration bits in BAP supported frame durations
google/mobly _{E2E test framework for devices}	Fix byte offsets of lines returned by LogcatProcessor.tail
google/sentencepiece _{Unsupervised text tokenizer for neural text processing}	fix(python): bind SentencePieceNormalizer.LoadFromSerializedNormalizerSpec

Capital One

Repository	Pull request
capitalone/datacompy _{DataFrame comparison library}	fix: keep the default tolerance key when upper casing column names
	fix: compare string lists in the pandas array comparator
	fix(polars): match duplicate rows when the first column has nulls

Adobe

Both fixes were carried into maintainer pull requests so CI could run with repository secrets, and the merged commits credit me as co-author.

Repository	Pull request
adobe/spectrum-web-components _{Spectrum design system web components}	fix(overlay): remove nonexistent OverlayDialog export _{Commit merged via this maintainer PR, carried over from #6790}
	fix(menu): skip hidden menu items during keyboard navigation _{Commit merged via this maintainer PR, carried over from #6789}

React

Repository	Pull request
react/metro _{JavaScript bundler for React Native}	Fix section offsets in generatedMappings() for indexed source maps

Vue

Repository	Pull request
vuejs/vitepress _{Vite and Vue powered static site generator}	fix: insert page title literally into titleTemplate

Mozilla

Repository	Pull request
mozilla/pontoon _{Mozilla's localization platform}	Fix misaligned search highlights

Uber

Repository	Pull request
uber/h3 _{Hexagonal geospatial indexing system}	Fix stringToInt CLI truncating 16 digit indexes

Tailwind Labs

Repository	Pull request
tailwindlabs/tailwindcss _{Utility first CSS framework}	Sort breakpoint variants with decimal values numerically

Valve

Repository	Pull request
ValveSoftware/Fossilize _{Vulkan pipeline state serialization}	Only build CLI-dependent tests when FOSSILIZE_CLI is enabled

Shopify

Repository	Pull request
Shopify/hydrogen _{Headless Shopify storefront framework}	Ignore query string when inferring SEO media type

Apple

Repository	Pull request
apple/embedding-atlas _{Interactive embedding visualization tool}	fix(backend): read .ndjson files as newline-delimited JSON

Netflix

Repository	Pull request
Netflix/spectator-py _{Python metrics library for Atlas}	Select the UDP socket writer by scheme, not substring

ByteDance Web Infra

Repository	Pull request
web-infra-dev/rsbuild _{Build tool for web apps, powered by Rspack}	fix(core): avoid treating sibling dist paths as nested
	fix(core): avoid printing 60.0s in build time logs

Portugol Webstudio

Community project. These pull requests are written in Portuguese, following the project's conventions.

Repository	Pull request
dgadelha/Portugol-Webstudio _{Online IDE for Portugol}	Tratar o texto substituto literalmente em `Texto.substituir`
	Aceitar um terminador de linha no fim da cadeia nos padrões de Tipos
	Ignorar o conteúdo depois do objeto em Objetos.criar_objeto_via_json
	Truncar o real passado para um parâmetro inteiro das bibliotecas

Featured project

Voodoo.js

JSX-style rendering directly inside plain HTML. No compiler. No transform. No build step.

Voodoo.js reads the markup the browser has already parsed, recovers each JSX expression and runs it through its own lexer, Pratt parser and AST interpreter. There is no eval and no new Function, so it works under a strict Content Security Policy, and every region is a reactive effect that re-renders when its data changes.

<!doctype html>
<html>
<head>
  <script src="https://cdn.jsdelivr.net/npm/voodoojs@0.13.0/dist/voodoo.full.min.js" defer></script>
</head>
<body>
{
  const user = 'Ana';
  const fruits = ['apple', 'pear', 'grape'];
}
<h1>Hello, {user}!</h1>
<ul>
  {fruits.map((fruit) => (
    <li>{fruit}</li>
  ))}
</ul>
</body>
</html>

Save it as index.html and open it: the page shows a heading that reads "Hello, Ana!" and a list with apple, pear and grape. No bundler, no dev server.

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