Lennart Oldenburg.

I am a software engineer with a PhD on Privacy Technologies, obtained in July 2025 under supervision of Prof. Claudia Díaz.

I am excited about realizing performant software solutions to interesting challenges, in domains such as privacy-enhancing technologies, distributed systems, climate tech, and networking.

I have years of experience working with Python (using numpy, pandas, PyTorch, and Ray Tune), Go, and Bash, instrumenting large arrays of Linux machines, and realizing machine learning pipelines. I am also keen on learning more and working with Rust.

For my PhD, I researched traffic analysis attacks and defenses on anonymizing networks such as Tor (onion routing) and Nym (mixnets). My work was empirical: I spent a lot of time designing and conducting large data collections to obtain high-quality datasets that I then analyzed to answer my research questions.

I enjoy thinking about science, technology, politics, and sustainability. I believe in hosting my own digital infrastructure and am constantly refining the constellation of services I host for myself. Originally from Germany, I currently live in Belgium.

Please find my software projects on GitHub and my published papers listed on Google Scholar.