Who we are

At Bold Tech, we are developers at heart - our goal is to build great internal apps for your teams quickly, without compromising on quality or functionality.

We believe that internal tools are the key to scaling a company by increasing employee productivity. We pride ourselves on our rapid work, while still playing close attention to detail, so you can take comfort in the fact that you have a reliable partner to take care of your internal tools.

Bold Tech was founded in 2020 to serve a growing interest in internal tools built faster on developer platforms. Since then, we have built over 250+ apps for all kinds of clients and industries. Our technical team has a background in internal tooling and adjacent services and specializes in building performant internal apps with optimized UX/UI.

An image of Joey Karczewski - founder of Bold Tech

Joey Karczewski


Joey was one of the first in the Retool Developers Network and is one of the leading app developers as recommended by Retool. In his spare time, he enjoys hiking up the local mountains, podcasts, reading & sharing his love for tech with those willing (or unwilling) to listen.

An Image of Sophie Becker, head of content at Bold Tech

Sophie Becker


Sophie is in charge of tutorials and blogs at Bold Tech. She's a keen traveler, multilinguist, and nature lover who spends most of her time outdoors. In her spare time, she can be found cooking intricate new recipes, hiking, and watching documentaries.

An image of Paul Van Geldrop, a developer at Bold Tech

Stefan Cvrkotic

Senior Developer

Stefan has been working in the IT industry since 2015 and has been a strong advocate of Retool as one of their early customers. Inspired by his experience, he completed his Computer Science degree with the thesis “Implementation of xRM concepts with Retool”. In his spare time, he likes hitting the gym and indulging in his car addiction.

An image of David Daugherty, a developer at Bold Tech

David Daugherty


David has been building internal tools since the summer of 2020. Previously, he worked as a business intelligence analyst for hospital networks in the Midwest of the United States. In his free time, David plays soccer for a 5th division La Liga team, goes surfing, and listens to podcasts.

Link to  Kelly Plathe's Retool Forum profile

Kelly Plathe


Kelly finished her PhD in Environmental Geochemistry, and later worked in research labs in Austria and Switzerland. She now owns part of a community-centered business in Graz, Austria where she helps with web design in her free time.

An image of Adam Artizada, a developer at Bold Tech

Adam Artizada


Adam has worked as a 3rd Level supporter, Project Manager and QA technician for different companies in Asia and Europe which gives him an overview of software and the databases that drives them.

An image of Tobias Ohlsson a developer at Bold Tech

Tobias Ohlsson


Tobias specialized in machine learning during his Master's in Computer Science and has previously worked as a full-stack developer at a German deep tech startup. He's now transferring these skill into the internal tool space. After work, you can find him playing volleyball, practicing Portuguese, or planning his next trip.

An image of Milan Kalem a developer at Bold Tech

Milan Kalem


Milan has 8 years of experience in the IT industry as a sales engineer and market analyst, where he worked with JS & SQL for data manipulation and analysis on platforms such as Tableau, Salesforce & Hubspot. In his spare time, he enjoys spending time with his family.