Senior Penetration Tester

Trading Technologies is looking for a highly skilled and technically creative Senior Penetration Tester to join our internal Offensive Security (Offsec) team. Reporting directly to the Offensive Security Manager, you will be the technical tip of the spear in proactively identifying and exploiting vulnerabilities across our entire technology estate.

In this senior technical role, you will lead complex, full-stack security assessments ranging from modern web applications and complex APIs to cloud infrastructure, CI/CD pipelines, and deep-dive Active Directory environments. Beyond breaking things, you will partner closely with our engineering teams to ensure vulnerabilities are understood and effectively remediated, while also serving as a technical mentor to the broader security team.