Daniel Stenberg
Daniel Stenberg, also known as bagder, is a Swedish software developer born on November 23, 1970. He created the data-transfer tool cURL, which is widely used and released under an MIT-based license. In 2017 he received the Polhem Prize for his work on cURL.
Stenberg grew up in Huddinge, near Stockholm. He worked at Mozilla from 2013 to 2018, then joined wolfSSL in 2019 to provide commercial support for cURL and work on it full-time. He is active in the Internet Engineering Task Force (IETF), contributing to HTTP/2 and QUIC and authoring several RFCs.
In April 2023 he became a member of the Polhem Prize committee. In October 2025 he received the Gold Medal from the Royal Swedish Academy of Engineering Sciences (IVA) for his open-source work on cURL and its impact on secure data transfer worldwide.
cURL is used by billions of devices across computers, phones, cars, satellites, and more.
This page was last edited on 1 February 2026, at 23:24 (CET).