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.

Thus far, I primarily worked with Python (using numpy, pandas, PyTorch, and Ray Tune), Rust, Go, and Bash, and have experience in instrumenting large arrays of Linux machines, building machine learning pipelines, and conducting high-performance computing.

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.