I'm Denis Rendler, a software developer and cybersecurity professional who bridges the gap between development, operations, and information security.

My journey from software development to DevOps to security taught me that the best security solutions are those who enhance productivity.
Security shouldn't be a roadblock-it should be transparent and integrated into how we build systems.

What You'll Find Here

This is my notebook focused on practical security knowledge you can apply today. I cover defensive vulnerability research, security tooling for secure workflows, and strategies that scale and help security teams.

My Approach

I focus exclusively on defensive security and responsible disclosure. All content is designed to help organizations improve their security posture through practical, implementable strategies that developers and operations teams want to work with.