Hi, I’m Kristian.

I program in Python and Ruby, enjoying especially machine learning engineering in Python and web development in Rails.

In my free time, I ski and snowboard in winter, and hike and cycle in summer.

Me, formal
Me, normal

Recent Projects

machine learning engineering · python · pytorch


Maze is an applied reinforcement learning framework built for real-world projects. I help design and build it as part of the amazing team at EnliteAI.

web development · rails · tailwind · stimulus


Paperback is a simpler and tidier alternative to wiki pages. Surface information in your team in conscise lists instead of getting lost in deeply nested hierarchies.

web development · rails · tailwind · stimulus


Data Job List aggregates job opennings in data science, data engineering, AI, and related fields, with focus on remote positions.


data-driven security · python · r

The Broken Shield: Measuring Revocation Effectiveness in the Windows Code-Signing PKI

Doowon Kim, Bum Jun Kwon, Kristian Kozak, Chris Gates, Tudor Dumitraș

27th USENIX Security Symposium (USENIX Security ’18, CORE A* conference)

WEIS 2018
data-driven security · python · r

Issued for Abuse: Measuring the Underground Trade in Code Signing Certificates

Kristian Kozak, Bum Jun Kwon, Doowon Kim, Tudor Dumitraș

17th Annual Workshop on the Economics of Information Security (WEIS 2018)

Get in touch

If you’d like to say hi, you can reach me at .

I am available for hire, but my capacity for new projects is currently limited to 10 hours per week.