Martijn Hols
React Developer at MartijnHols
Gelderland, Netherlands
Summary
👤
Senior🎓
Top SchoolMartijn Hols is a seasoned React developer and architect with 11 years of professional experience and over 7 years focused specifically on React, building and leading full-stack projects from SPAs to PWAs. He has founded and scaled notable products like WoWAnalyzer (550k+ monthly uniques at peak) and repeatedly set up robust React/TypeScript frameworks, component libraries and CI/CD flows for clients and startups. Martijn excels “under the hood”: performance, accessibility, service workers, complex component interactions and developer experience are recurring focuses that boost team velocity and long-term maintainability. He enjoys mentoring teams, shaping solution directions, and translating product needs into pragmatic, testable architectures. Based in Gelderland, Netherlands, he blends hands-on implementation with strategic technical leadership and a strong open-source mindset.
11 years of coding experience
10 years of employment as a software developer
Bachelor of Applied Science (B.A.Sc.) Informatica, Bachelor of Applied Science (B.A.Sc.) Informatica at HAN University of Applied SciencesMBO Applicatie Ontwikkelaar, MBO Applicatie Ontwikkelaar at ROC A12
Dutch, English
Stackoverflow
1,509reputation
200kreached
38answers
3questions
Github Skills (18)
javascript10
css10
typescript10
user-interface10
front-end-development10
typescript-types10
typescripts10
react10
site-design9
website-design9
html6
swift6
uitextfield6
xcode-ui-testing6
xcode6
Programming languages (12)
Github contributions (5)
WoWAnalyzer/WoWAnalyzer
Jan 2017 - Jun 2022
WoWAnalyzer is a tool to help you analyze and improve your World of Warcraft raiding performance through various relevant metrics and gameplay suggestions.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:1 release, 179 reviews, 6207 commits in 5 years 5 months
Contributions summary:Martijn primarily contributed to the front-end development of the WoWAnalyzer project. They implemented new UI components, as seen in the "Reimplement timeline spell highlighting" and "Fix a few React warnings" commits, and worked on improving the visual layout and styling, as shown by the commits related to the timeline, statistics, and homepage design. Furthermore, the user showed proficiency in web design and UI improvement by addressing responsiveness issues and optimizing the user experience, as evidenced by the commits related to ad display and page layout. They demonstrate strong competency in React and are focused on the front-end aspects of the project.
luareactsuggestionswarcraftworld-of-warcraft
MartijnHols/actions-cache
Nov 2020 - Oct 2022
Enhanced actions/cache: Get full control over caching
Contributions:57 commits, 2 PRs, 63 pushes in 1 year 11 months
cachinglrucachecache-control
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