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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
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    Last 90 days
    0contributions
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    Last 12 months
    1contribution
    high1
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    score3

    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 ...
    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 · 01:01
    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.
    August 2019
    Aug 16 Fri · 17:08
    Forums med
    Created a topic, Errors for VCS and Not activating, on the site WordPress.org Forums:
    Hi, My client asked us to add this to their site but w…
    February 2019
    Feb 23 Sat · 15:34
    Core med
    Created ticket #46329 on Core Trac:
    sanitize_text_field after 5.1 update should account for __toString() ...
    September 2018
    Sep 05 Wed · 15:36
    Forums med
    Posted a reply to How to stop data being tracked before user has accpeted, on the site WordPress.org Forums:
    It is only going to overwritten if you are not using a child theme. Which…

    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