Simon Fondrie-Teitler

Infrastructure Engineer

Simon Fondrie-Teitler keeps The Markup’s servers secure and stable.

Before joining The Markup, he worked as a software developer, systems administrator, and SRE for various startups as well as The University of Wisconsin–Madison.

He has also contributed to Free Software projects, including Debian and MediaGoblin.

simon@themarkup.org @varlogsimon

Facebook-like thumb with images of Black people and culture

Citizen Browser

Facebook Got Rid of Racial Ad Categories. Or Did It?

Our Citizen Browser project found an array of proxies through which advertisers can target Black Facebook users, among otherdemographics

July 9, 2021 08:00 ET

Citizen Browser

After Repeatedly Promising Not to, Facebook Keeps Recommending Political Groups to Its Users

The company announced the policy as a way to stop spreading divisive content

June 24, 2021 08:00 ET

An illustration of a needle with an angry facebook emoji with hand pushing back

Citizen Browser

Facebook Said It Would Stop Recommending Anti-Vaccine Groups. It Didn’t

As COVID-19 surged, the social media company pointed users to all sorts of anti-vaccine and anti-maskgroups

May 20, 2021 08:00 ET

An illustration of a Facebook thumb in a sling

Citizen Browser

How Big Pharma Finds Sick Users on Facebook

We found drug ads targeted at users interested in everything from bourbon to therapy

May 6, 2021 08:00 ET

An illustration of a wall of credit cards that is dividing a group of people

Citizen Browser

Credit Card Ads Were Targeted by Age, Violating Facebook’s Anti-DiscriminationPolicy

Such ads, along with other age-targeted financial product ads, may violate civil rights laws, attorneys say

April 29, 2021 08:00 ET

Show Your WorkCitizen Browser

How We Built a Facebook Feed Viewer

Split Screen invites readers to explore how different people experienceFacebook

March 11, 2021 08:00 ET

Citizen Browser

Introducing “Split Screen”

A new tool from The Markup’s Citizen Browser project

March 11, 2021 08:00 ET

Illustration of a phone-styled billboard where the light only shines on white passers-by, while black passers-by are left in the dark

Citizen Browser

Official Information About COVID-19 Is Reaching Fewer Black People on Facebook

According to data from The Markup’s Citizen Browser project, there are major disparities in who is shown public health information about the pandemic

March 4, 2021 08:00 ET

Image of Donald Trump looking at the camera from behind a pile of Facebook flags added to his posts

Citizen Browser

Trump’s False Posts Were Treated with Kid Gloves by Facebook

Data from Citizen Browser shows how rare it is for a post to be called “false”—especially if you’re the president

February 16, 2021 08:00 ET

Citizen Browser

Lawmaker Questions Facebook on Broken Election-RelatedPromise

Following an investigation by The Markup, Sen. Ed Markey is asking for answers on why Facebook failed to stop recommending politicalgroups

January 26, 2021 08:00 ET

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