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Fernando Claussen

Full Stack Web Developer at Trew Knowledge

@fclaussen Toronto, Ontario joined Dec 2013

github.com/fclaussen github.com/fclaussen Slack: @Fernando Claussen
    Languages pt_BR

    Bio

    I’m a Full Stack Developer at Trew Knowledge.
    My work consists of building custom plugins and themes that are accepted under the WordPress VIP standard.

    Right now I’m based at our Toronto office but sometimes I’m enjoying the sunny weather of Rio de Janeiro.
    Feel free to reach out if you need help with anything.

    Interests

    – Podcasts
    – React and React Native Development
    – Taking Online Courses
    – TV Series
    – Online Games
    – Teaching and doing presentations.

    WordPress Origin Story

    I started with WordPress when I first started working as a frontend developer.
    I though I knew WordPress back then.

    Things evolved naturally and thanks to Trew Knowledge I had a chance to improve my PHP and WordPress skills and be where I am today.

    Next step is to start teaching and participating in talks.

    Badges

    CODE
    2 badges
    Core Contributor '18 Plugin Developer
    POLYGLOTS
    1 badge
    Translation Contributor '16

    Current Job

    Full Stack Web Developer
    Present
    Trew Knowledge

    Recent impact

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

    Last 30 days
    0contributions
    high0
    medium0
    score0
    Last 90 days
    0contributions
    high0
    medium0
    score0
    Last 12 months
    2contributions
    high2
    medium0
    score6

    WordPress releases

    Contributed to 2 releases
    • 5.1
    • 4.9

    Contributions

    Type
    November 2025
    Nov 18 Tue · 19:23
    Core med
    Created ticket #64273 on Core Trac:
    [WP 6.9 RC2] - Notes showing "Original Block Deleted" when made in a ...
    October 2025
    Oct 23 Thu · 17:12
    Plugins high
    Committed [3383587] to Plugins SVN:
    Updating "tested up to" to 6.8 and reordering contributors
    November 2023
    Nov 09 Thu · 21:50
    Core med
    Created issue #56015 in the WordPress/gutenberg repository:
    Wrong CSS Styles when defining custom Button fontSizes
    February 2023
    Feb 15 Wed · 15:56
    Forums med
    Posted a reply to Downloadable files loosing reference on product update, on the site WordPress.org Forums:
    Hi @xue28 Thanks for getting back to me. I was actually able to fix it…
    Feb 08 Wed · 18:53
    Forums med
    Created a topic, Downloadable files loosing reference on product update, on the site WordPress.org Forums:
    Hi all, I saw this happening on a site we were deve…
    October 2020
    Oct 22 Thu · 14:37
    Forums med
    Created a topic, Not working for other post types, on the site WordPress.org Forums:
    At first, I thought it was the environment I was in be…
    May 2020
    May 21 Thu · 17:09
    Forums med
    Posted a reply to php helper function not working?, on the site WordPress.org Forums:
    Hi, I'm not sure about your implementation specifically but if you wrap code that creates…
    May 14 Thu · 01:02
    Plugins high
    Committed [2304547] to Plugins SVN:
    May 14 Thu · 01:01
    Forums med
    Posted a reply to V 2.1.1 bug: PHP Notice: Undefined variable: type, on the site WordPress.org Forums:
    Thank you for letting me know. I'm pushing 2.1.2 to fix that.
    May 13 Wed · 23:17
    Plugins high
    Committed [2304515] to Plugins SVN:

    Developer

    2 plugins

    Plugins

    2 favorites

    Translations

    1 locale
    pt_BR Português do Brasil (Portuguese) Translation Contributor

    Contributed translations to 10 projects.

    GDPR WordPress 4.6.x WordPress 4.7.x WordPress 4.8.x WordPress 4.9.x WordPress 5.0.x WordPress 5.1.x WordPress 5.2.x WordPress 5.3.x WordPress 7.0.x - Development

    View all on translate.wordpress.org