AXS is seeking a Principal Penetration Testing Engineer to join our offensive security program and active adversary intervention capabilities. This is not a standard penetration testing role—you'll architect and execute sophisticated adversary emulation campaigns, hunt live threats in production environments, and bridge the gap between offensive and defensive security through purple team operations. In this role, you'll think simultaneously as attacker and defender, leading engagements that test not just our technical controls but our people, processes, and detection capabilities. You'll work directly with incident response teams during active breaches, applying offensive tradecraft to reconstruct attack paths, predict adversary next moves, and validate remediation effectiveness. You'll also help shape our security strategy at the highest levels, presenting to executive leadership and driving organization-wide security initiatives. You will work on consumer-facing and B2B applications that can scale and handle high demand, as well as complex enterprise systems that meet our global needs.