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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
    6contributions
    high6
    medium0
    score18
    Last 90 days
    20contributions
    high20
    medium0
    score60
    Last 12 months
    109contributions
    high81
    medium28
    score271

    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
    October 2026
    Oct 20 Tue · 17:51
    Core high
    Mentioned in [64615] on WordPress SVN:
    Build/Test Tools: Cover user creation and bulk deletion.
    Oct 19 Mon · 17:39
    Core high
    Mentioned in [64527] on WordPress SVN:
    Code Quality: Narrow types for REST requests and responses.
    Oct 17 Sat · 16:45
    Core high
    Mentioned in [64438] on WordPress SVN:
    Connectors: Preload the screen's REST API responses.
    Oct 15 Thu · 03:20
    Core high
    Mentioned in [64351] on WordPress SVN:
    Administration: Display 404 error for unregistered admin pages.
    September 2026
    Sep 30 Wed · 18:56
    Core high
    Mentioned in [64026] on WordPress SVN:
    Build/Test Tools: Fix loopback requests in the Docker environment.
    Sep 26 Sat · 02:43
    Core high
    Mentioned in [63941] on WordPress SVN:
    Code Quality: Add conditional return types across core.
    Sep 23 Wed · 07:52
    Meta high
    Confirmed as a speaker for WordCamp Vienna 2027
    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.

    Developer

    4 plugins

    Contributor

    1 plugin

    Completed courses

    1 completed

    Browse courses on Learn WordPress

    Plugins

    7 favorites

    Translations

    2 locales
    de_DE Deutsch (German) Patterns Translation Editor Project Translation Editor Translation Contributor

    Translation editor for 1 project.

    Patterns

    Translation editor for 2 projects.

    Plugins Themes

    Contributed translations to 5 projects.

    Apermo AdminBar Apermo AdminBar Toggle Apermo Xdebug Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder Yoast SEO – Advanced SEO with real-time guidance and built-in AI

    View all on translate.wordpress.org

    de_DE / formal Deutsch (German) Translation Contributor

    Contributed translations to 2 projects.

    Apermo AdminBar Apermo Xdebug

    View all on translate.wordpress.org