Willem-jaap Klepper
Eigenaar & Software Developer at Pixel Perfect
Middelharnis, South Holland, Netherlands
Summary
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Rockstar🎓
Top SchoolWillem-jaap Klepper is a hands-on software developer and founder with six years of experience building performant, user-centered web platforms from startup SaaS to large e-commerce systems. As owner and frontend/UX lead at Pixel Perfect he combines product-minded engineering with clean frontend architecture—Next.js, React and TypeScript—while also shipping Laravel backend work. His background includes embedded retail systems (native POS with hardware integrations) and modernizing legacy stacks, giving him a practical eye for long-term maintainability and operational efficiency. An active OSS author (CSS Clamp, Laravel Env), he blends component-driven UI design with pragmatic backend integrations to help scale businesses without accruing technical debt.
6 years of coding experience
2 years of employment as a software developer
Student, Software Developer, Applicatie- & Mediaontwikkelaar, Student, Software Developer, Applicatie- & Mediaontwikkelaar at Hoornbeeck College
Stackoverflow
52reputation
126reached
4answers
0questions
Github Skills (104)
authentication10
form-validation10
usestate10
schema10
encryption10
hybrid10
javascript10
type-inference10
modular10
browser10
validation10
laravel10
toast10
react-framework10
params10
Programming languages (7)
Github contributions (5)
Willem-Jaap/cssclamp
Nov 2023 - Mar 2025
Create easy clamping for margins, paddings and fonts with CSS & Tailwind output
Contributions:159 PRs, 122 pushes, 15 branches in 1 year 3 months
csstailwind
pixel-perfect-agency/eslint-config-pixel
Mar 2023 - Jun 2026
Strict ESLint config for Next.js with Typescript maintained and used by Pixel Perfect Agency
Contributions:4 releases, 1 review, 113 PRs in 3 years 2 months
eslint-confignextjstypescript
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