Okan YILDIZ in

Okan YILDIZ

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Staff Security Engineer at Depop
📍 Leighton Buzzard, England, United Kingdom

Okan YILDIZ is the Staff Security Engineer at Depop, with over nine years of experience in cybersecurity, specializing in application security, DevSecOps, and threat modeling. Holding certifications like CCISO and CEH, people often describe him as a "true professional" with "deep technical expertise" and an "unwavering work ethic. "

Passionate about advancing the cybersecurity field, he serves as the Chairman of UNIQUESEC, a global non-profit organization for industry professionals. He actively contributes to community building and knowledge sharing, connecting experts from around the world to foster collaboration and innovation in cyber resilience.

As the first technical Security Engineer at Depop, he was responsible for establishing the companys entire security function from the ground up.

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Experience
12 Years
Current Role
Staff Security Engineer
Job Level
Middle
Location
Leighton Buzzard, England, United Kingdom
Personality Overview

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Communication Style
Decision Approach
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Priorities

Topics Okan cares about

Application Security
His expertise includes scaling tools like Snyk and Semgrep for thousands of engineers, overseeing SAST/DAST, and conducting secure code analysis at major retail and tech companies.
DevSecOps Implementation
He focuses on integrating security practices directly into the development lifecycle, ensuring a proactive and embedded approach to building secure applications from inception to scale.
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Career

Work history

11-2025
Staff Security Engineer
Depop
11-2022
Chairman
UNIQUESEC
2-2025 - 11-2025
Principal Product Security Engineer
Marks and Spencer
4-2023 - 2-2025
Lead Security Engineer & Architect
SITA
11-2019 - 2-2025
Director
Secure Debug
In the press

Media appearances

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Education
2013 - 2017
Software Engineering
Manisa Celal Bayar University
2011 - 2012
Education details unavailable
Fatih Gelenbevi Anadolu Lisesi
Social presence
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Behavioral profile

DISC profile (public)

DISC behavioral profile

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