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# Javascript Developer Job

- **Company:** Thegiglab
- **Location:** Rotterdam, Netherlands
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, JavaScript (Programming Language), Firebug, JQuery
- **Published:** August 21, 2026
- **Apply:** https://www.werk.nl/nl/vacatures/70935909

## About the Role

Level 3 "I proudly use jQuery " - You know how to attach scripts to events properly. - You are able to write and work with "plain objects". - You can work with a javascript framework. - You know why eval() is evil, and you know who the evil twin sisters of eval() are.
Level 4 "Hold on, I'm stepping through my code in FireBug " - You can write fairly complex functions and "subfunctions". - You have a fair understanding of what closures are, and what good they'll do. - You know that Javascript has only objects and no classes, and why. - You have a deep understanding of what can be done on which browser, and what can't.
This is your current level? grit@thefrontendlab.com
Level 5 "My code is JSLint-proof " - You can write pluggable and well-maintainable code with anonymous functions in complex constructs. - You have a fair understanding of how a framework works internally, and why things work (or don't) work the way they do. - At some point in the past you ended up writing some sort of framework yourself. - You have built a good number of tools in javascript for the purpose of education, fun, or just to "see if...



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