Lukas Märdian is an IT services senior specialist and seasoned systems engineer with 16 years' experience building and maintaining Linux networking and virtualization stacks across Canonical, Debian and SAP cloud operations. A passionate free and open-source software advocate and Debian Developer, he has driven Netplan development and package maintenance, including non-obvious low-level work such as GSM/CDMA modem integration, IPv6 token handling and cgroupv2 refinements. His open-source contributions span high-performance networking (MoonGen IPsec work with Intel X540 crypto details) to snapd and snap tooling, reflecting deep protocol and kernel-space familiarity alongside pragmatic DevOps practices. As a former co-founder and freelancer he blends entrepreneurial product thinking with rigorous QA, root-cause analysis and long-term support experience for production Linux deployments.
16 years of coding experience
11 years of employment as a software developer
M.Sc. Computer Science, M.Sc. Computer Science at Beihang University
M.Sc. Computer Science, M.Sc. Computer Science at Technical University of Munich
Raumer Gallenmüller Emmerich Märdian Wohlfart Carle, Raumer Gallenmüller Emmerich Märdian Wohlfart Carle at [Publication] Efficient serving of VPN endpoints on COTS server hardware
Märdian Emmerich Raumer, Märdian Emmerich Raumer at [Publication] What’s New in the Linux Network Stack?
Declarative network configuration for various backends
Role in this project:
Back-end Developer & Test Automation Engineer
Contributions:10 releases, 694 reviews, 622 commits in 2 years 10 months
Contributions summary:Lukas contributed significantly to the development and testing of the Netplan configuration tool. They focused on adding support for GSM/CDMA modems and integrating them with NetworkManager. Furthermore, the user expanded the functionality by implementing features like the ipv6-address-token and the ability to set the regulatory domain. They also addressed several bugs, including issues with interface renaming and test reliability.
MoonGen is a fully scriptable high-speed packet generator built on DPDK and LuaJIT. It can saturate a 10 Gbit/s connection with 64 byte packets on a single CPU core while executing user-provided Lua scripts for each packet. Multi-core support allows for even higher rates. It also features precise and accurate timestamping and rate control.
Role in this project:
Back-end Developer
Contributions:79 commits, 1 PR in 2 months
Contributions summary:Lukas's commits primarily focus on implementing and debugging features related to IPsec within the MoonGen packet generator project. They developed and refined functions for setting and getting keys, IP addresses, and SPI values, essential for secure packet handling. The user also worked on incorporating an ESP header and added functionalities for packet encapsulation and decapsulation, thus making contributions to the core functionality of an IPsec tunnel. Moreover, the user demonstrates a deep understanding of the hardware registers for the Intel X540 crypto engine through their code.
packetsdpdklibevconnectionlibuv
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