Daniel Poelzleithner
Captain at Self-employed
Greater Dresden Area Germany
Summary
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RockstarDaniel Poelzleithner is a seasoned Linux and backend engineer with 17 years of experience, currently bootstrapping his own venture as a self-employed "Captain" in the Greater Dresden Area. He spent seven years as a Linux consultant at B1 Systems and has prior software development experience at Cloud&Heat, blending deep systems knowledge with practical software delivery. Daniel is an active open-source contributor, improving user-facing features and core libraries in notable projects like Mixxx (free DJ software) and adding robust Nix-based builds and test infrastructure to lsyncd. His work shows a knack for bridging UX improvements with low-level stability fixes and reproducible build systems—a sign of both user empathy and DevOps rigor. Comfortable across backend development, deployment tooling, and system engineering, he brings reliable execution and a preference for reproducible, testable workflows. An interesting detail: he has hands-on experience creating local SSH test harnesses and integrating Nix flakes to modernize legacy projects.
17 years of coding experience
1 year of employment as a software developer
Github Skills (19)
c-language10
qt10
nix10
testing10
openssh10
lua10
cprogramming-language10
scripting9
user-interface9
cicd9
shell9
script9
sh9
database8
databases8
Programming languages (28)
Github contributions (5)
lsyncd/lsyncd
Nov 2021 - Nov 2022
Lsyncd (Live Syncing Daemon) synchronizes local directories with remote targets
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:2 releases, 5 reviews, 122 commits in 11 months
Contributions summary:Daniel implemented a Nix-based build system for the project, as evidenced by the addition of a `flake.nix` file. The user also made significant changes to facilitate testing, including the implementation of a local SSH server and the use of relative paths for binaries. They also added an option to pass ssh command arguments. Moreover, the user integrated various merges from the master branch, including issue fixes and added examples.
syncingrsyncdaemondirectoriestargets
mixxxdj/mixxx
Nov 2017 - Sep 2022
Mixxx is Free DJ software that gives you everything you need to perform live mixes.
Role in this project:Back-end Developer
Back-end DeveloperContributions:106 reviews, 191 commits, 59 PRs in 4 years 11 months
Contributions summary:Daniel primarily contributed to the Mixxx DJ software by implementing new features and making improvements to the user interface. They worked on enabling sorting options in the Recordings View, adding a checkbox menu for crate selection with improved crate management, and fixing data loss issues within the history view. These changes involved modifications to the core library code, including crate management, and updates to the user-facing track table view, indicating a focus on improving the application's functionality and user experience.
everythingwindowshidmidilinux
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