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James Koster

Designer at Automattic

@jameskoster UK joined Aug 2009

jameskoster.design github.com/jameskoster Slack: @jameskoster
    Teams Design

    Bio

    Designer @ Automattic.

    Interests

    Horticulture, Espresso, Exercise, Art, Tech, Pizza

    WordPress Origin Story

    Discovered WordPress when building Quake III: Arena clan websites for friends back in the noughties.

    Badges

    CODE
    5 badges
    C Core AI Contributor '26 Core Contributor '19 Core Team '23 Plugin Developer Theme Developer

    Current Job

    Designer
    Present
    Automattic

    Recent impact

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

    Last 30 days
    40contributions
    high15
    medium25
    score70
    Last 90 days
    80contributions
    high28
    medium52
    score136
    Last 12 months
    212contributions
    high52
    medium160
    score316

    Team focus

    Across 1 team, with no team-attributable contributions in the last 365 days

    WordPress releases

    Contributed to 18 releases
    • 7.0
    • 6.9
    • 6.8
    • 6.7
    • 6.6
    • 6.5
    • 6.4
    • 6.3
    • 6.2
    • 6.1
    • 6.0
    • 5.9
    • 5.8
    • 5.7
    • 5.6
    • 5.5
    • 5.4
    • 5.3

    Time commitment

    10 hours per week of sponsored contribution time

    Contributions

    Type
    June 2026
    Jun 05 Fri · 14:46
    Core med
    Submitted pull request #78983 to WordPress/gutenberg:
    Tooltip: Use md border radius for portaled popups.
    Jun 05 Fri · 12:12
    Core high
    Pull request #78979 merged into WordPress/gutenberg:
    Storybook: Declare workspace dependencies for theme example story
    Jun 05 Fri · 11:37
    Core med
    Submitted pull request #78979 to WordPress/gutenberg:
    Storybook: Declare workspace dependencies for theme example story
    Jun 04 Thu · 16:26
    Core high
    Merged pull request #78814 into WordPress/gutenberg:
    Storybook: Enhance Theme Provider example with admin-ui Page.
    Jun 04 Thu · 16:25
    Core med
    Closed pull request #76249 on WordPress/gutenberg:
    Components: Consolidate focus style treatment
    Jun 04 Thu · 14:49
    Core high
    Merged pull request #78732 into WordPress/gutenberg:
    Dashboard: Opinionated grid columns with container breakpoints
    Jun 03 Wed · 14:45
    Core med
    Submitted pull request #78913 to WordPress/gutenberg:
    Add xl border radius token for page shell surfaces.
    Jun 02 Tue · 15:54
    Core med
    Submitted pull request #78885 to WordPress/gutenberg:
    Popover: add open/close motion and fix close re-anchor
    Jun 02 Tue · 14:14
    Core med
    Created issue #78883 in the WordPress/gutenberg repository:
    `@wordpress/ui` Button lacks distinct `:active` (pressed) styling
    Jun 02 Tue · 13:34
    Core med
    Closed issue #65088 on the WordPress/gutenberg repository:
    Components: `:focus` → `:focus-visible`

    Developer

    Contributor

    Plugins

    Themes