Our team
The faces behind CELUS
Librarian-first, data-driven and a little quirky. Meet the developers, librarians and support people in Prague who build CELUS and help libraries and consortia make sense of their usage data.

Beda Kosata
Lead Developer & the Organic Brain of CELUS
Beda is the not-so-secret sauce behind Big Dig Data, the company powering CELUS. He's not only CELUS' heart, soul, and brain but also the secret ingredient in our tech innovations. Fueled by the finest coffee, a table tennis enthusiast, and a mountain-scaling adventurer, Beda is our crown jewel. In simpler terms: no Beda, no CELUS.

Tomas Novotny
Founder & Godfather
Armed with a degree in Applied Informatics in Chemistry from the University of Chemistry and Technology in Prague. He's a versatile asset, navigating REACH Regulation, GMO research, and even doing a little AI dance. Tomáš believes in keeping things simple, aligning perfectly with CELUS' philosophy. He's also the team's source of positivity, adding sunshine to CELUS' atmosphere and making it the cheerful hub it is today!

Stepan Henek
(Mostly) Backend Developer
Stepan's communication style leans towards binary code, but when decoded into human language, he shares, "I work mostly on the backend part of CELUS for a couple of years now. I was brought to the CELUS team by our Team Lead/UI guru Béda.
As for the CELUS future, I think that it will play a significant role in preserving human knowledge during the upcoming zombie apocalypse."

Ken DiFiore
Library Ambassador
Our librarian on a mission to modernize libraries, fueled by a love for Czech desserts rivaling a sugar-loving unicorn! He's the wizard behind CELUS' library outreach, leading the charge into the digital age and battling outdated card catalogs. When not at conferences or hosting webinars, Ken embarks on epic quests through the world's greatest libraries and archives. Watch out, Dewey Decimal System, Ken's coming for you with a keyboard and a wicked sense of humor!

Simona Popelkova
Librarian Happiness Manager
Our Product Owner extraordinaire at CELUS. Her job description might as well be "Chief Everything Officer." Whether it's debugging SUSHI credentials or polishing marketing materials, she's the go-to person. Need assistance with CELUS? Simona's got your back, and she might even draft a knowledgebase article while at it. She might have shown you her CELUS-colored nails at some conference. But her secret talent? Crafting hilariously witty bios for the CELUS website – a skill that took everyone by surprise!

Evgeny Shevchuk
(Mostly) Frontend developer, Mascot
Evgeny is the kind of person who’ll happily spend his weekend battling dragons in a DnD campaign, then switch gears to explore the intricacies of a new JavaScript framework for fun. By day, he’s updating and refining the frontend of CELUS, constantly looking for ways to improve performance and usability. When he's not in code, you'll find him smashing it on the squash court (his legs are too short for any bigger court), serving aces in table tennis, or dominating at board games. Evgeny thrives on learning, laughter, and being lovingly mocked by his colleagues.

Kamila Kosatova
Heart of Customer Support & Power BI Whisperer
Kamila may be petite, but she's mighty, with a smile that never quits and curly hair that bounces with every solved problem. After 25 years in a bank, she joined CELUS customer support and mastered the platform in a few weeks. Then she discovered Power BI, and the numbers never stood a chance. Since the Data Hub launched in spring 2026, she's been building analytics on top of it, hosting webinars on Power BI and cost-per-use, and helping librarians turn usage statistics into real collection decisions. She does all this while still making sure your SUSHI credentials behave. A climber, nature lover and polyglot (English, German, French, and Spanish in progress), Kamila proves that no mountain is too high, whether it's made of rock, code or spreadsheets.

Lucie Sera
Library Sorceress
Lucie is our walking library powerhouse with a Master's degree in Information studies and librarianship, and a Bachelor's degree in Informatics and Chemistry. With her togetherness and the wisdom gained from working at the Library of the Institute of Archaeology of the Czech Academy of Sciences, Lucie is basically the Hermione Granger of CELUS. If there's a prize for tracking down the best source of metadata on journals, consider it claimed by Lucie faster than you can say "Accio research!"

Diana Varsikova
Data Processing Genius
Diana, much like her well-cared-for plants, is a rare find. Behind her innocent appearance lies a mathematical genius who subscribes to magazines just for their beautiful data visualizations (true story). She's adept in data processing and machine learning, finally providing Beda with someone he can have intellectually challenging conversations with. She thrives on copious amounts of excellent tea, consuming liters of it daily.
Company
The company behind CELUS
Big Dig Data s.r.o.
CELUS is developed and operated by Big Dig Data, a software company based in Prague. CELUS started in 2018 as a project for CzechELib, the Czech national consortium of academic libraries.
U Větrníku 40/1
Prague
162 00
Czech Republic

Where History Meets Innovation – Our Offices by Větrník Mill in Prague, Czech Republic