Yosevu Kilonzo
Full Stack Engineer at Primum
Sioux Falls, South Dakota, United States
Summary
🤩
Rockstar🎓
Top SchoolYosevu Kilonzo is a full-stack engineer with a decade of experience building web and cross-platform mobile apps using React Native, Next.js, Tailwind CSS and AWS. Based in Sioux Falls, he has contributed to design-system work at scale, including migrating Spectrum CSS components to core tokens on Adobe’s spectrum-css repository. His background spans startups and consultancies where he’s led responsive frontend builds, enrollment and patient portals, and prototype AI chat integrations using LangChain and OpenAI. At Sparkbox he balanced hands-on engineering with mentoring, accessibility, testing, and DevOps-heavy projects, developing a pragmatic consultant mindset. Trained in linguistics and English, he brings strong communication and curriculum-style clarity to product-focused engineering. He’s as comfortable shipping UI components as he is shaping integrations that turn research proofs-of-concept into production-ready features.
10 years of coding experience
5 years of employment as a software developer
Bachelor of Arts - BA, English Language and Literature/Letters, 3.641, Bachelor of Arts - BA, English Language and Literature/Letters, 3.641 at Northern State UniversityMaster of Arts (M.A.), Linguistics for TESOL, 3.87, Master of Arts (M.A.), Linguistics for TESOL, 3.87 at University of Colorado Boulder
English, Swahili, Korean
Github Skills (7)
css10
system10
system-design10
carbon-design-system10
sys10
tokenizer9
tokenize9
Programming languages (14)
Github contributions (5)
adobe/spectrum-css
Jun 2022 - Dec 2022
The standard CSS implementation of the Spectrum design language.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:100 reviews, 149 commits, 17 PRs in 5 months
Contributions summary:Yosevu primarily contributed to the migration of various CSS components within the `spectrum-css` repository to core tokens. Their work involved updating the styling of components such as `closebutton`, `statuslight`, `toast`, `buttongroup`, `checkbox`, `tabs`, `swatch`, `swatchgroup`, `inlinealert`, `pickerbutton`, `link`, and `progressbar`. This included updating existing styles and incorporating new features, modifiers and removing existing ones.
cssdesign-system
bantuist/bloc-jams
Aug 2016 - Jun 2017
Contributions:7 PRs, 126 pushes, 29 branches in 9 months
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