John Blackbourn (@johnbillion) – WordPress user profile

Bio

I’m one of the team of WordPress core developers. I was the release lead for WordPress 4.1 and 4.9.1. I work as the Director of WordPress Security at Human Made and I’m the WordPress core security team lead.

Previously I’ve worked at Code For The People and WordPress.com VIP.

Badges

CODE

6 badges

Core Contributor '15 Core Team '15 Meta Contributor '15 Plugin Developer Security Contributor '22 Security Team '22

CONTENT

1 badge

Documentation Contributor '17

COMMUNITY

5 badges

bbPress Contributor '19 B BuddyPress Contributor '19 Meetup Organizer '18 WordCamp Organizer '20 WordCamp Speaker '19

PRACTICE

2 badges

Accessibility Contributor '19 Support Contributor '26

POLYGLOTS

1 badge

Translation Contributor '15

Current Job

Present

Human Made Ltd

Recent impact

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

Last 30 days

201contributions

high128

medium73

score457

Last 90 days

318contributions

high209

medium109

score736

Last 12 months

947contributions

high598

medium349

score2143

Team focus

Share of contributions across teams during the last 365 days

WordPress releases

Contributed to 39 releases

Time commitment

16 hours per week of sponsored contribution time

Human Made

Contributions

Type

August 2026

Aug 31 Mon · 20:04

Core med

Created ticket #66009 on Core Trac:
Application password UX improvements

Aug 31 Mon · 18:44

Core med

Closed ticket #57299 on Core Trac:
Implement array key type notation

Aug 31 Mon · 17:03

Core high

Mentioned in [63410] on WordPress SVN:
Build/Test Tools: Publish PHPUnit timing metrics to CodeVitals.

Aug 29 Sat · 23:29

Forums med

Posted a reply to wp-cli cron event and paused crons, on the site WordPress.org Forums:
The paused events do still run in this situation, but their callback never fires, so…

Aug 29 Sat · 23:10

Plugins high

Committed [3671929] to Plugins SVN:
Update to version 1.21.2 from GitHub

Aug 29 Sat · 20:41

Plugins high

Committed [3671878] to Plugins SVN:
Update to version 1.12.2 from GitHub

Aug 28 Fri · 17:01

Meta med

Wrote a comment on the post The Core Security Initiative, on the site Making WordPress Secure:
+make.wordpress.org/core/

Aug 28 Fri · 00:04

Core high

Mentioned in [63380] on WordPress SVN:
HTML API: Refactor `wp_get_admin_notice()`.