Simon Leinen
Network Engineer at SWITCH
Ecublens, Vaud, Switzerland
Summary
👤
Senior🎓
Top SchoolSimon Leinen is a seasoned network and cloud engineer with over 30 years of experience helping academic institutions adopt and govern cloud technologies like OpenStack and Ceph. At SWITCH he has progressed from hands-on network engineering to cloud architecture and team leadership, blending operational expertise with strategic insight into legal and governance challenges for research communities. He has a long history of protocol and network-management work dating back to IETF participation and software development in traffic accounting, and continues to contribute tooling such as the UDP replication utility samplicator. Passionate about preserving the Internet’s generative potential, he combines that advocacy with practical efforts to mitigate vendor lock-in and data-control risks in modern cloud offerings. Based in Ecublens, Switzerland, his background bridges deep technical skills and institutional strategy, making him a pragmatic advocate for open, community-run cloud infrastructure. An early observer of the web’s evolution, he brings a rare perspective that pairs nostalgia for permissionless innovation with actionable plans to restore it via open technologies.
31 years of coding experience
19 years of employment as a software developer
Diplom, Diplom at Technische Universität Berlin
English, German, French
Stackoverflow
511reputation
70kreached
10answers
0questions
Github Skills (12)
c1710
udp10
socket10
c1110
networking10
system-administration8
file-descriptor6
linux6
linux-kernel6
ipv66
unix6
python6
Programming languages (21)
Github contributions (5)
sleinen/samplicator
Oct 1999 - Oct 2021
Send copies of (UDP) datagrams to multiple receivers, with optional sampling and spoofing
Role in this project:
Back-end & Systems Engineer
Back-end & Systems EngineerContributions:3 releases, 175 commits, 14 PRs in 22 years 4 months
Contributions summary:Simon's contributions primarily involve the development and maintenance of the `samplicator` project, which focuses on replicating UDP datagrams to multiple receivers. Their work includes significant code revisions, adding functionality for source address spoofing, and improving the configuration and usage of the tool. These changes also include enhancements such as setting socket buffer sizes and implementing features for UDP checksum calculations to maintain better data integrity during transmission.
ackdatagramsudpcopieswake-on-lan
sleinen/zrcal
Dec 2015 - Aug 2024
This Web application mines Open Government Data published by the city of Zurich, in particular the schedules for the collection of various types of garbage. Users can generate personalized calendars depending on their place of residence.
Contributions:2 reviews, 45 PRs, 61 pushes in 8 years 9 months
personalizedplaceparticularzurichschedules
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