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Christoph Daum

Senior Software Developer at Coding Pioneers

@apermo Germany, Bergkamen joined Nov 2011

christoph-daum.de github.com/apermo Slack: @Christoph Daum (apermo)
    Teams Community Core
    Languages de_DE

    Bio

    Christoph is a WordPress and PHP specialist, with over 25 years of experience in web development. He started first web projects in the late 90s, some of which are still leading in their field. As technical lead on multiple projects with millions page impressions per month, his responsibilities included theme and plugin development, performance optimizations, and feature planning.

    Christoph is a contributor to the WordPress ecosystem, host and founder of his local WordPress Meetup in Dortmund, and a frequent speaker at meetups and WordCamps.

    Interests

    WordPress, PHP, 3D Printing, DIY

    WordPress Origin Story

    I started of doing mostly TYPO3 when my good friend Hendrik Luehrsen @luehrsen talked in the highest tones about WordPress. Later during my agency days, I started working with WordPress, and in 2012 I attended my first WordCamp in Berlin, which was called WPCamp. On my second WordCamp in 2013, I met Robert Windisch @nullbyte, well and for everyone who knows Robert, this is all you need to know. Since that day, I’ve only missed a 3 WordCamps in Germany, I became founder and host of my local WordPress Meetup and I’m part of the “usual suspects” to buy a WordCamp ticket on release day.

    Since 2014 I call myself an in-house developer for WordPress, doing WordPress as a full-time job. During these days I’ve dug very deep into multiple areas of the WordPress code, found a few bugs, suggested some improvements and the best is yet to come.

    Badges

    CODE
    2 badges
    Core Contributor '19 Plugin Developer
    CONTENT
    1 badge
    Documentation Contributor '23
    COMMUNITY
    3 badges
    Meetup Organizer '18 WordCamp Speaker '16 WordCamp Volunteer '26
    POLYGLOTS
    2 badges
    Translation Contributor '16 Translation Editor '16

    Current Job

    Senior Software Developer
    Present
    Coding Pioneers

    Recent impact

    Score weights high-impact work (commits, releases, approved translations, props) at 3x routine activity.

    Last 30 days
    7contributions
    high7
    medium0
    score21
    Last 90 days
    25contributions
    high24
    medium1
    score73
    Last 12 months
    105contributions
    high76
    medium29
    score257

    Team focus

    Share of contributions across teams during the last 365 days

    WordPress releases

    Contributed to 12 releases
    • 7.1
    • 7.0
    • 6.9
    • 6.8
    • 6.7
    • 6.6
    • 6.3
    • 6.2
    • 6.1
    • 5.6
    • 5.4
    • 5.3

    Time commitment

    4 hours per week of sponsored contribution time

    Contributions

    Type
    September 2026
    Sep 10 Thu · 10:48
    Core high
    Mentioned in [63579] on WordPress SVN:
    Script Loader: Avoid a false entry in inline script data.
    Sep 02 Wed · 19:08
    Core high
    Mentioned in [63441] on WordPress SVN:
    Code Quality: Restore `void` on the dual-mode template tag.
    Sep 02 Wed · 18:36
    Core high
    Mentioned in [63440] on WordPress SVN:
    Code Quality: Correct three inverted `$display` return docs.
    Sep 01 Tue · 18:26
    Core high
    Mentioned in [63426] on WordPress SVN:
    Code Quality: Fix PHPStan-identified static analysis regressions from the 7.1 cycle.
    August 2026
    Aug 28 Fri · 20:07
    Meta high
    Confirmed as a speaker for WordCamp Netherlands 2026
    Aug 27 Thu · 16:17
    Core high
    Mentioned in [63365] on WordPress SVN:
    Code Modernization: Use `array_find()` and `array_find_key()` where appropriate.
    Aug 26 Wed · 21:44
    Core high
    Mentioned in