Thomas Dullien, (a.k.a. Halvar Flake) is a mathematician-turned-cybersecurity luminary and engineer. He co-founded zynamics, the reverse‑engineering tools company behind BinDiff, BinNavi, and VxClass, all of which had major impact on binary analysis and were later integrated into Google following its acquisition of zynamics in 2011. He subsequently served as a Staff Engineer at Google Project Zero, contributing to foundational research in software security and exploitability modeling.

In recent years, he shifted focus to computational efficiency and cloud economics. Which brought Thomas to co‑founding optimyze.cloud, a company dedicated to reducing compute waste and improving cloud cost‑efficiency, driven by the end of Moore’s Law and the economics of SaaS infrastructure. The company was acquired by Elastic in 2021.