Ada Homolova

🐸 Data Frosch

A learning platform focused on data journalism. Here I run my data journalism mentorship program and an online community by and for nerds in the newsroom called 🪷The Pond🪷.

🕺 Elvis (map me tender)

I was the initiator and project leader of a data visualisation tool for public spending networks. We set out to visualise all the public spending in Europe as a graph. See how it worked in this YouTube video, or have a look at the version we made for defence tenders (in collaboration with the Government Transparency Institute).

Dataharvest

💪 Since 2020 I have been the coordinator of the data skills training at the Dataharvest conference.

University of Gothenburg

🐍 Between 2020 and 2024 I was a guest lecturer on Python programming for master students of the Investigative Journalism (MIJ) program.

IJ4EU

💪 Since 2022 I have been a mentor for the recipients of the cross-border investigative grants, helping them up their data game.

Correctiv.Europe

Since 2026 I have been collaborating with Correctiv's European desk.

Follow The Money

Since 2022 I have been regularly publishing with Follow The Money as part of the Brussels desk.

💰 €72,461 per bed: Construction costs soar for Meloni's offshore migrant hubs (2025)
🌾 Agricultural millionaires and minimum wages: how European subsidy policy increases inequality (2022)

Lost in Europe

In 2020–2021 I worked with a European team of journalists reporting on migration, especially children missing in migration. The story with most impact I worked on quantified the number of missing children in European asylum centres. It was initially published in 9 outlets and was republished as far as Russia, Syria and South America.

👧👦 Nearly 17 child migrants a day vanished in Europe since 2018 (2021, The Guardian)

Arena for Journalism in Europe

🏆 Won the European Press Prize for Cities for Rent.

In 2021 I co-led Cities for Rent, a European collaborative reporting project on corporate landlords convened by Arena for Journalism in Europe. As data coordinator, I collected, cleaned, and standardized data from our partner newsrooms, and prepared it for the final data visualisations.

🏙️ See all the publications

OCCRP

🏆 Kočner's Library won the Award of the Investigative Journalism Fund in Slovakia.

In 2020 I was part of the OCCRP's data team on two major European projects.

Kočner's Library. In late 2019, reporters at the Ján Kuciak Investigative Center in Bratislava and the Czech investigative reporting platform Investigace.cz were given access to the complete police case file on the brutal assassination of Martina Kušnírová and Ján Kuciak in 2018. Slovak police and Europol had collected a total of 53 TB of material — digital copies of seized computers and phones, footage from security cameras, and other evidence. I helped to transfer and analyse the information and share it with local newsrooms to produce dozens of articles across multiple outlets.

🐘 How to eat an elephant (2020, OCCRP)

Europe's COVID-19 Spending Spree Unmasked. As COVID-19 hit Europe, government public spending rules were no longer adhered to. OCCRP set up a European collaboration to collect and analyse COVID-19 public tender data. As the data coordinator, I collected, cleaned and standardized 21 billion euros of tender data from 37 countries.

😷 Publication
📊 Background on the data collection (OpenContracting.org)
😺 GitHub repository with all the data

Pointer (KRO-NCRV)

In 2019 I was briefly employed by Pointer, a pioneer data newsroom of the Dutch broadcaster KRO-NCRV. We combined the expertise of data specialists, coders and designers for each story. Examples (in Dutch):

🐦‍⬛ Rare birds at risk due to nitrogen pollution
🍄 The water boards cost three billion euros annually, and you pay that bill
📃 Requested a government document? Sometimes you have to wait for years

Investico

Between 2014 and 2018 I worked as data journalist with the independent platform for structural investigative journalism. Example story (in Dutch):

🪴 Whose coffeeshop is that?

OneWorld

Between 2014 and 2018 I worked as data journalist with a small Dutch magazine focused on sustainability and human rights. Examples (in Dutch):

✈️ Did KLM really have a Ghanaian family offset our CO2 emissions?
👩🏽‍🦽‍➡️ You can not go to the toilet here
🚂 Sleeping on the rail