Linus Nielsen
Simulation Model Developer
Alingsås, Sweden
Summary
🤩
RockstarLinus Nielsen is a seasoned embedded and low-level software engineer with 24 years of experience building device drivers, simulation models and firmware close to the metal. As co-founder of Haxx AB and a long-time contributor to projects like curl, he blends consultancy and product work—shipping simulation models for Simics at Wind River and IoT firmware for nRF52840-based devices. His background spans hypervisors on PPC without virtualization support, FPGA driver work for automotive platforms, and even VHDL for medical devices, showing a rare mix of hardware-facing depth. Linus is happiest solving hardware-adjacent problems—SSL/TLS and FTP improvements to libcurl and a persistent connection cache among his open-source footprints reflect his attention to robust, low-level networking. Based in Alingsås, Sweden, he thrives on reverse-engineering and squeezing performance out of constrained systems.
24 years of coding experience
32 years of employment as a software developer
English, French
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (6)
c1710
ssl10
ftp10
c1110
libcurl10
http8
Programming languages (7)
Github contributions (5)
curl/curl
Jan 2007 - Jun 2015
A command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS. libcurl offers a myriad of powerful features
Role in this project:
Backend Developer
Backend DeveloperContributions:17 commits, 2 pushes, 2 comments in 8 years 6 months
Contributions summary:Linus primarily contributed to the backend functionality of the curl project, with a focus on SSL/TLS and FTP-related features. They fixed compilation errors related to SSL, corrected error codes for SSL shutdown failures, and introduced new FTP CCC (Clear Command Channel) functionality, including both passive and active modes. The user also implemented a new persistent connection caching system using bundles, improving connection reuse and laying the groundwork for future features.
rtmppop3dictscptelnet
Rockbox-Chinese-Community/Rockbox-RCC
Apr 2002 - Nov 2008
Various enhancements of new features and human-based design.
Contributions:2207 commits in 6 years 8 months
enhancementsnew-features
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