Ron Valstar
Front-end Developer at Self-employed
Amsterdam, North Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolRon Valstar is a senior front-end developer based in Amsterdam with 13 years of experience crafting responsive, performant web applications and design-driven interfaces. With a foundation in graphic and interaction design (BA/MA from HKU), he blends visual sensibility with pragmatic engineering—building SPAs in React and Angular and creating design systems for e-learning and enterprise clients. He has delivered production applications for organizations like Vodafone, Randstad and ASN Bank, and co-founded Shapers where he shipped education-focused platforms early in his career. Comfortable across full-stack workflows, he’s tackled legacy refactors, performance optimization, build tooling improvements and component testing, and has experience integrating with varied backends including Laravel, WordPress REST APIs and Haxe systems. Notable is his long-running self-employed practice, which reflects a consistent focus on translating complex product needs into maintainable front-end architecture.
13 years of coding experience
16 years of employment as a software developer
MA Interactive Multimedia, MA Interactive Multimedia at HKU (Hogeschool voor de Kunsten Utrecht)Advertising, Advertising at CIBAP
Stackoverflow
2,557reputation
1.9mreached
39answers
10questions
css
top-5%
javascript
top-5%
html
top-5%
image
top-5%
Github Skills (200)
e2e-testing10
testing10
e2e10
javascript10
browser10
vue-testing-library10
react-testing-library10
test-automation10
angular-testing-library10
testing-library10
test-suite10
cypress10
eleventy10
svelte-testing-library10
test-runner10
Programming languages (8)
Github contributions (5)
Sjeiti/qr-scanner
Jun 2020 - Oct 2023
Lightweight Javascript QR Code Scanner
Contributions:2 PRs, 2 pushes, 2 branches in 3 years 3 months
qrcodejavascript-qrscannerjavascriptqr-code
Sjeiti/ronvalstarnl
Aug 2019 - Mar 2025
Contributions:138 PRs, 581 pushes, 30 branches in 5 years 8 months
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