Daniel Stenberg

Sweden

Daniel Stenberg is a Swedish Internet protocol expert and developer who has participated in and worked with Open Source for 30 years. He is most known for being the founder and lead developer of the curl project since 1998, one of the world's most widely used software components that runs in virtually every smartphone, TV, server and Internet-connected device in the world. He participates in protocol development within the IETF and has authored books on curl, HTTP/2, HTTP/3 and more. Frequent public speaker.

Community Contributions

LatestBlog postsOpen sourceVideo/PodcastSpeaking ArticlesOther

Gold medal from the Academy of Engineering Science

The Royal Swedish Academy of Engineering Sciences (IVA) awards me a gold medal 2025 for my work on curl: Daniel Stenberg, software developer, is awarded IVA’s Gold Medal for his outstanding contributions to software development, where he has played a central role in internet infrastructure and open source software. Through his work with curl – a tool now used by billions of devices worldwide – he has enabled reliable and secure data transfer over the internet, not only between traditional computer programmes but also across smartphones, vehicles, satellites and spacecraft.

Other / 10-24-2025

Developer of the year 2025 in Sweden

I was awarded Developer of the year on September 12, 2025.

Other / 09-12-2025

European Open Source Achievement Award

And President of the European Open Source Academy

Blogpost / 01-30-2025

Microsoft MVP

Daniel was accepted to the Microsoft MVP program. Subsequently left the program again after a few months because it did nothing good.

Blogpost / 10-02-2024

curl

I work on curl full-time both at work and spare time. One of the world's most widely used software components. The Internet's transfer engine. I make a new release at least every 8 weeks, and I've been doing this since the 1990s. At 250+ releases and counting.

Open source project / 10-20-2023

Next Level curl

A look at some of the most powerful and interesting recent additions to curl—some lesser-known curl tricks that might enrich your command lines, extend your “tool belt” and make you more productive. At the Nordic API 2023 Platform Summit.

Speaking (conference/usergroups) / 10-18-2023

Mastering the curl command line

The curl master class. This is a 3.5 hours marathon video teaching you almost everything there is to know about using and mastering the curl command line tool. The project, internet transfers, command line, curl basics, TLS, proxies, HTTP, FTP, Future.

Video/Podcast / 08-31-2023