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Jen Simmons

Jen Simmons

Born 1969 · Age 56

American graphic designer, web developer, educator and speaker; member of the W3C CSS Working Group. Prominent advocate of modern CSS (notably CSS Grid). Former developer advocate at Mozilla; currently a developer advocate at Apple.

Total Events
27
Career Span
33 years
Peak Net Worth
$650,000

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Life & Career Timeline

1991Age 22

Earned BA in Sociology, Gordon College

Completed a Bachelor of Arts degree in sociology at Gordon College.

1/1/1991Net Worth: $30,000Source
Confidence
90%
1998Age 29

Began working on websites

Started professional work on websites (design and development), marking the start of her web career.

1/1/1998Net Worth: $60,000Source
Confidence
90%
2007Age 38

Earned MFA in Film and Media Arts, Temple University

Graduated from Temple University with an MFA in Film and Media Arts.

1/1/2007Net Worth: $120,000Source
Confidence
95%
2007Age 38

Joined Twitter

Began using Twitter (account active since 2007).

1/1/2007Net Worth: $125,000Source
Confidence
90%
2007Age 38

Coined 'fail whale' on Twitter

Posted the tweet that coined the term 'fail whale' for Twitter's outage illustration (tweet dated 2007-09-02).

9/2/2007Net Worth: $125,000Source
Confidence
95%
2008Age 39

Created the Bartik theme for Drupal (approx.)

Credited as the creator of the Bartik theme, which later became a Drupal core default theme (exact creation year not specified on source; approx. before Drupal 7).

1/1/2008Net Worth: $140,000Source
Confidence
40%
2011Age 42

Bartik became default theme in Drupal 7

Bartik (created by Jen Simmons) was included as a core/default theme in Drupal 7.

1/1/2011Net Worth: $150,000Source
Confidence
90%
2013Age 44

Joined W3C Responsive Images Community Group

Joined the W3C Responsive Images Community Group to work on standardizing responsive image use cases and requirements.

1/1/2013Net Worth: $180,000Source
Confidence
95%
2014Age 45

Spoke at CSS Dev Conf 2014

Presented and was on the schedule for CSS Dev Conf 2014 (speaker engagement).

1/1/2014Net Worth: $200,000Source
Confidence
85%
2015Age 46

Presented at An Event Apart

Presented at the An Event Apart conference (photo/caption evidence from 2015).

1/1/2015Net Worth: $220,000Source
Confidence
90%
2015Age 46

The Web Ahead won Podcast of the Year (Net Awards)

Jen's podcast 'The Web Ahead' was awarded Podcast of the Year at the 2015 Net Awards.

1/1/2015Net Worth: $230,000Source
Confidence
90%
2016Age 47

Joined Mozilla as Designer & Developer Advocate

Became a designer and developer advocate at Mozilla, working on web platform features and developer tools.

1/1/2016Net Worth: $250,000Source
Confidence
95%
2016Age 47

Joined the W3C CSS Working Group (CSS WG)

Became a member of the W3C CSS Working Group while at Mozilla; continued membership after moving to Apple.

1/1/2016Net Worth: $250,000Source
Confidence
95%
2017Age 48

Designed Firefox Grid Inspector

Led design work on Firefox's Grid Inspector developer tool (documented in articles about debugging CSS Grid with Firefox).

1/1/2017Net Worth: $300,000Source
Confidence
90%
2018Age 49

Started 'Layout Land' YouTube channel (approx.)

Runs the 'Layout Land' YouTube channel focused on modern web layout techniques (start year not specified in source; approximate).

1/1/2018Net Worth: $350,000Source
Confidence
40%
2019Age 50

Reached 100,000+ Twitter followers (reported)

Reported to have more than 100,000 Twitter followers (Twitter account active since 2007; follower count referenced in sources retrieved in 2019).

1/1/2019Net Worth: $400,000Source
Confidence
85%
2019Age 50

Spoke at SmashingConf SF 2019

Listed as a speaker at SmashingConf SF 2019 (conference speaking engagement).

1/1/2019Net Worth: $400,000Source
Confidence
90%
2020Age 51

Joined Apple as Developer Advocate (Web Developer Experience)

Moved from Mozilla to Apple to work as a developer advocate on the Web Developer Experience team (WebKit/Safari).

1/1/2020Net Worth: $500,000Source
Confidence
95%
2020Age 51

Involvement with CSS Grid Layout Module Level 2

Worked on and helped communicate CSS Grid Layout Level 2 (continuing advocacy and specification work as a member of CSS WG).

1/1/2020Net Worth: $520,000Source
Confidence
80%
2021Age 52

Editor on CSS Box Sizing Module Level 4 (draft)

Served as an editor on the CSS Box Sizing Module Level 4 draft (documented in W3C/draft resources).

1/1/2021Net Worth: $540,000Source
Confidence
85%
2021Age 52

Editor on CSS Grid Layout Level 3 (draft)

Listed as an editor on drafts of CSS Grid Layout Module Level 3.

1/1/2021Net Worth: $540,000Source
Confidence
85%
2021Age 52

Contributed to CSS Cascading & Inheritance drafts (Levels 5 & 6)

Contributed to the CSS Cascading and Inheritance specification work (levels 5 and 6) as part of the CSS WG activities.

1/1/2021Net Worth: $550,000Source
Confidence
80%
2021Age 52

Contributed to CSS Shapes Module Level 1 and Containment Module Level 3

Helped prepare and communicate work on CSS Shapes Module Level 1 and CSS Containment Module Level 3 (spec contributions noted in W3C references).

1/1/2021Net Worth: $550,000Source
Confidence
80%
2022Age 53

Continued CSS WG membership while at Apple

Maintained her CSS Working Group membership after moving to Apple, continuing spec work and advocacy.

1/1/2022Net Worth: $600,000Source
Confidence
90%
2022Age 53

The Web Ahead — cumulative podcast milestone (site stats)

The Web Ahead site lists ~117 episodes and about 3.1 million downloads (site stats shown on The Web Ahead pages; retrieval dates varied).

1/1/2022Net Worth: $600,000Source
Confidence
60%
2023Age 54

Ongoing advocacy & public speaking

Continues to speak at major web conferences (SXSW, DrupalCon, SmashingConf, An Event Apart) and create educational content for web developers.

1/1/2023Net Worth: $625,000Source
Confidence
90%
2024Age 55

Active contributor to modern CSS deployment and education

Ongoing public-facing developer advocacy, tooling (e.g., Grid Inspector), specification editing and educational content (YouTube, podcast, talks).

1/1/2024Net Worth: $650,000Source
Confidence
85%

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