Christopher Jellen
Security Engineer at Wraithwatch
Seattle, Washington, United States
Summary
🤩
Rockstar🎓
Top SchoolChristopher Jellen is a security engineer and software developer with six years of experience building and operationalizing distributed systems for developer, data science, and security teams. He has shipped infrastructure and telemetry improvements at Microsoft Defender, led the open-source CALDERA project at MITRE—contributing full‑stack UI and integration work for a widely used adversary emulation platform—and now applies that offensive/defensive perspective at Wraithwatch. His background in applied ML research at the U.S. Naval Academy produced novel near‑real‑time models for optical turbulence and several publications, giving him uncommon depth in MLOps and scientific rigor. Comfortable across Python, Go, JavaScript, Docker, and cloud platforms, he combines product-minded engineering with hands‑on implementation and a track record of guiding small teams to deliver interoperable, customer-focused solutions.
6 years of coding experience
5 years of employment as a software developer
Bachelor of Applied Science - BASc, Mechanical Engineering, Honors Applied Mathmatics, Bachelor of Applied Science - BASc, Mechanical Engineering, Honors Applied Mathmatics at United States Naval Academy
German
Github Skills (12)
html10
uid10
javascript10
front-end-development10
alpinejs10
ui-design10
api-design9
restful-api9
rest-api9
mitre-attack9
cybersecurity9
api-rest9
Programming languages (8)
Github contributions (5)
apache/caldera
Oct 2021 - Dec 2021
Automated Adversary Emulation Platform
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:13 reviews, 10 commits, 2 PRs in 2 months
Contributions summary:Christopher primarily focused on enhancing the user interface of the Caldera platform, specifically within the `templates/abilities.html` and `templates/profiles.html` files. They implemented and refined the "Create Ability" modal, addressing issues with cleanup command handling and ensuring data integrity for the REST API. Their work involved modifications to the Alpine.js framework and incorporating UI fixes, indicating a blend of front-end and potential back-end understanding of how the UI interacted with the underlying data structures.
emulationadversary-emulationcalderasecurity-automationred-team
CDJellen/cdjellen.github.io
May 2020 - Nov 2025
Contributions:1 PR, 135 pushes, 7 branches in 5 years 7 months
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