Marko Heijnen (@markoheijnen) – WordPress user profile

Marko Heijnen

Senior Software engineer at Jamf / CodeKitchen B.V.

@markoheijnen Groningen, The Netherlands joined Oct 2009

markoheijnen.com github.com/markoheijnen Slack: @Marko Heijnen

Teams Core Performance Core Hosting Meta Polyglots Support

Languages nl_NL

Bio

I’m a software engineer from the Netherlands, bringing over a decade of expertise to the table. Specialising in PHP, DevOps, and WordPress development, I have spearheaded numerous successful projects for global clients through my own agency. My dedication to the WordPress community dates back to 2009, where I have since then contributed to 23 versions and served as the lead developer of GlotPress from 2013 to 2015. My contributions have been instrumental in expanding WordPress’s reach across multiple languages, making GlotPress a cornerstone of its translation efforts.

Interests

WordPress, Kubernetes, DevOps, Beta versions

WordPress Origin Story

I have been using WordPress since 2006 and started contributing back to it in 2009 with my first code contribution in early 2010. In that period custom post type begin to see it’s daylight and I was more than eager to start using it. While the work just started, it also meant it wasn’t fully integrated and buggy at the time. That for me was a great place to start testing and creating patches to improve WordPress. While still being a noob around version control, with the help of the core team, I was able to start contributing back to WordPress in great ways, from core, Polyglots, localisation, Meta, community and GlotPress. In 2012 I even had commit access to the unit test repository so I could improve the test suite of WordPress directly as well.

Badges

CODE

3 badges

Core Contributor '15 Meta Contributor '15 Plugin Developer

CONTENT

1 badge

Documentation Contributor '17

COMMUNITY

3 badges

B BuddyPress Contributor '19 WordCamp Organizer '16 WordCamp Speaker '14

PRACTICE

1 badge

Test Contributor '24

POLYGLOTS

2 badges

Translation Contributor '15 Translation Editor '21

Current Job

Senior Software engineer

Present

Jamf / CodeKitchen B.V.

Recent impact

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

Last 30 days

3contributions

high3

medium0

score9

Last 90 days

4contributions

high4

medium0

score12

Last 12 months

9contributions

high9

medium0

score27

Team focus

Share of contributions across teams during the last 365 days

WordPress releases

Contributed to 23 releases

Contributions

Type

October 2026

Oct 23 Fri · 17:22

Polyglots high

Translated 1 string on translate.wordpress.org.

Oct 22 Thu · 20:29

Core high

Mentioned in [64681] on WordPress SVN:
Widgets: Avoid sidebar name collision in `dynamic_sidebar()`.

Oct 18 Sun · 22:36

Core high

Mentioned in [64490] on WordPress SVN:
Media: Generate animated image sub-sizes by default.

August 2026

Aug 21 Fri · 08:37

Polyglots high

Translated 1 string on translate.wordpress.org.

June 2026

Jun 11 Thu · 11:34

Polyglots high

Translated 1 string on translate.wordpress.org.

May 2026

May 13 Wed · 06:57

Polyglots high

Translated 2 strings on translate.wordpress.org.

March 2026

Mar 04 Wed · 13:59

Polyglots high

Translated 1 string on translate.wordpress.org.

January 2026

Jan 12 Mon · 15:14

Polyglots high

Translated 1 string on translate.wordpress.org.

December 2025

Dec 30 Tue · 15:05

Polyglots high

Translated 3 strings on translate.wordpress.org.

August 2025

Aug 18 Mon · 09:58

Polyglots high

Translated 1 string on translate.wordpress.org.

Developer

9 plugins

Fullscreen Gallery

10+ active installs
Gmagick

50+ active installs
Improved GD Image Editor

10+ active installs
Improved Image Editor

10+ active installs
MySQLi database layer

100+ active installs
Polyglots

10+ active installs
Tabify Edit Screen

500+ active installs
WP DB Driver

50+ active installs
YouTube DJ

10+ active installs

Contributor

1 plugin

Custom Content Types by Pixelpillow

Less than 10 active installs

Plugins

8 favorites

Translations

12 locales

nl_NL Nederlands (Dutch) Plugins Translation Editor Translation Contributor

Translation editor for 1 project.

XS2Content

Contributed translations to 3 projects.

WordPress for Android XS2Content WordPress 7.1.x - Development

View all on translate.wordpress.org

azb گؤنئی آذربایجان (South Azerbaijani) Translation Contributor