Quildreen Motta
Software Engineer at Klarna
Sweden
Summary
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RockstarQuildreen Motta is a software engineer in Sweden with 15 years of experience blending functional programming, language design, and applied research to improve collaboration and maintainability in large, third-party‑heavy codebases. Currently at Klarna, she builds production software while continuing experimental programming language research—her project Purr explores practical ways to help teams understand and evolve complex systems. Previously at Kukac she led front-end efforts, designed several DSLs, and spearheaded tools and a large AI-driven distributed system, working across JavaScript, TypeScript, Java, Scala, Clojure, and Ruby. An active open-source contributor, she made substantive fixes to the widely used es5-shim library, improving core array/string behaviors for legacy JavaScript engines. She also writes and presents on technical topics and brings an artist-writer sensibility to engineering, with an affinity for cute things and cats that surfaces in her creative approach to tooling.
15 years of coding experience
8 years of employment as a software developer
English, Portuguese
Github Skills (5)
javascript10
s510
polyfills10
ecmascript10
regular-expression9
Programming languages (16)
Github contributions (5)
es-shims/es5-shim
Aug 2011 - Sep 2011
ECMAScript 5 compatibility shims for legacy (and modern) JavaScript engines
Role in this project:
Backend Developer
Backend DeveloperContributions:6 commits in 1 month
Contributions summary:Quildreen primarily contributed to the core functionality of the `es5-shim` library. Their work involved implementing and fixing various JavaScript array methods like `forEach`, `map`, `filter`, `every`, `some`, `reduce` and `reduceRight`, and addressing incorrect handling of `indexOf` and `lastIndexOf`. The user also addressed issues related to whitespace handling in strings by modifying the regular expression. Finally, they added licensing information to the project.
jsshimscommonjsjavascriptesmodules
origamitower/purr
Jun 2018 - Jan 2019
[wip] A multi-paradigm, safe, and practical meta-language targeting JavaScript.
Contributions:166 commits, 5 PRs, 108 pushes in 7 months
multi-paradigmwipjavascriptmetaf-sharp
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