Gert-Jan Kooijmans

Berlin, Germany • ENTP

Active 1d ago

Bio: Self-taught Developer turned Mentor. Helping JavaScript Devs move into Senior levels faster and living better lives at theSeniorDev.com

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@gert-jan-kooijmans-1268

I am a frontend developer mostly working with Angular and previously React. I want to level up and feel confident to move into a senior position.

Active 19m ago

Joined Dec 24, 2025