In April 2018, Angwin and Jeff Larson left ProPublica to found The Markup, described on their website as a "nonpartisan, nonprofit newsroom" that will produce "data-centered journalism" to uncover "societal harms of technology". They were joined by Sue Gardner, as a co-founder, the Canadian Broadcasting Corporation and several ProPublica staff members. Harvard-University-based NiemanLab described Angwin and Larson as a "journalist-programmer team" at ProPublica who uncovered stories such as "how algorithms are biased". In April 2019, she was dismissed from the Markup. Five of the seven editorial staff immediately resigned in support of her, and over 145 journalists and researchers signed a letter of support. In August, she was reinstated in her role as editor-in-chief and The Markup was reformed with the original editorial staff.
Wall Street Journal
Angwin was a Wall Street Journal staff reporter based at their New York bureau covering business and technology for thirteen years from 2000 to 2013, when she left for ProPublica. In their review of Dragnet Nation, The Economist, wrote that Angwin, beginning in 2010, had overseen Wall Street Journals "pioneering series" entitled "What They Know" which exposed how privacy was being eroded with most people completely unaware that it was happening. While at the Wall Street Journal, in 2010, Angwin wrote about how Google's co-founders, Sergey Brin, Larry Page, and Eric Schmidt disagreed on the development of Google Chrome with Schmidt opposing the idea because of potential "browser wars". A November 23, 2009 article by Angwin and Geoffrey A. Fowler, entitled "Volunteers Log Off as Wikipedia Ages" on the "unprecedented numbers of the millions" of Wikipedia editors that were quitting, was featured on the front page of the Wall Street Journal. She shared the 2011 Gerald Loeb Award for Online Enterprise for the story "What They Know".
ProPublica
Angwin was a senior reporter and investigative journalist at ProPublica, that was described as The New York Times as "big tech's scariest watchdog." In 2016, Angwin was lead author of an article revealing machine bias against black people in criminal risk assessment that used machine learning systems. In a 2016 article entitled "Google Has Quietly Dropped Ban on Personally Identifiable Web Tracking", Angwin revealed that Google had changed its privacy policy allowing Google to merge users' personally identifiable information. Following publication of her article, Google announced that this precluded advertisement targeting through Gmail keywords. She shared the 2018 Gerald Loeb Award for Beat Reporting for the story "Automating Hate".
Books
Angwin is the author of Stealing MySpace: The Battle to Control the Most Popular Website in America and Dragnet Nation. In his New York Times "Sunday Book Review" of Stealing MySpace, Michael Agger described Angwin's "meticulously" detailed description of Rupert Murdoch's purchase of MySpace in 2005 from Intermix Media despite competition from News Corp and Viacom, as "so granular that it passes through boring into surreal." The Washington Posts Scott Rosenberg compared Stealing MySpace to Kara Swisher's There Must be a Pony in Here Somewhere: The AOL Time Warner debacle and the quest for the digital future. The Economist, Kirkus Reviews, and the Los Angeles Times gave Dragnet Nation favorable reviews. In a 2014 interview with Bill Moyers about Dragnet Nation, Angwin described reporters as "prime targets for Internet snooping" and "the canary in the coal mine" of internet privacy - the first to feel the "impact of total surveillance". She said that as "watch dogs for democracy", journalists need to protect their sources. In a 2014 interview with Kirkus Reviews's Neha Sharma, Angwin said that she had become aware of data scraping while researching Stealing MySpace. To protect her own digital content, she began using Tails.
In 2003 Angwin was one of The Wall Street Journals staff reporters whose stories on the history and impact of corporate scandals in the United States, were acknowledged with a Pulitzer Prize for Explanatory Reporting.
