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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
    high4
    medium2
    score14
    Last 90 days
    18contributions
    high13
    medium5
    score44
    Last 12 months
    82contributions
    high52
    medium30
    score186

    Team focus

    Share of contributions across teams during the last 365 days

    WordPress releases

    Contributed to 11 releases
    • 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
    June 2026
    Jun 12 Fri · 10:18
    Core med
    Closed pull request #11456 on WordPress/wordpress-develop:
    Toolbar: Add access+w keyboard shortcut to toggle toolbar on frontend
    May 2026
    May 31 Sun · 19:19
    Core high
    Mentioned in [62437] on WordPress SVN:
    Privacy: Correct type of `WP_User_Request::$user_id` from `int` to `string`/`numeric-string`.
    May 27 Wed · 11:02
    Core high
    Pull request #76299 merged into WordPress/gutenberg:
    Docs: Fix big_image_size_threshold xref typo
    May 26 Tue · 08:58
    Core high
    Mentioned in [62419] on WordPress SVN:
    Abilities API: Expand core/get-user-info with profile fields
    May 18 Mon · 17:55
    Core med
    Submitted pull request #11855 to WordPress/wordpress-develop:
    Docs: Clarify return value semantics of `wpdb` query methods
    May 18 Mon · 17:54
    Core med
    Created ticket #65261 on Core Trac:
    Docs: Clarify return value semantics of wpdb::get_results()
    May 02 Sat · 05:16
    Core high
    Mentioned in [62292] on WordPress SVN:
    Build/Test Tools: Honor `@global` docblock tags in PHPStan analysis.
    April 2026
    Apr 27 Mon · 02:19
    Core high
    Mentioned in [62269] on WordPress SVN:
    Administration: Widen screen options number of items field.
    Apr 27 Mon · 02:10
    Core high
    Mentioned in [62268] on WordPress SVN:
    Administration: Widen screen options number of items field.
    Apr 18 Sat · 12:40
    Core med
    Submitted pull request #77472 to WordPress/gutenberg:
    Env: Bypass Composer 2.8 audit.block-insecure for PHPUnit install

    Developer

    4 plugins

    Contributor

    2 plugins

    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 – The Contact Form Builder That Grows With You 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