Senior Staff Machine Learning Engineer

Description du poste

The Security and Risk Engineering organization builds scalable, AI-powered security solutions that reduce risk and protect ServiceNow and its customers. It values AI-first thinking, clean architecture, intuitive experiences, and a culture of continuous learning This is a zero-to-one incubation building a new class of exposure analysis that ranks security work by exploitability rather than raw severity. The architecture is evolving, and this role helps define what good looks like As a Senior Staff Engineer, you own the architecture of a security harness with a novel exploitability engine end to end, and are accountable for the decisions that shape everything downstream. You set technical direction, make the hard calls defensible, and multiply the engineers around you Own the end-to-end architecture of the exploitability engine—from evidence ingestion and entity resolution, through the attack-path probability core and choke-point ranking, to the validation loop that keeps predictions honest Own decisions that cascade through the system: calibrated probability versus ordinal rank, identity as a first-class graph edge, assume-breach seeding, and how the most critical assets are defined Own the probabilistic ranking core: edge-traversal probability, guided path search with hop and likelihood limits, correlated-control-failure modeling, and honest uncertainty bands Own the calibration and validation loop—canaries, purple-team and incident replay, calibration measured by zone and vector—that turns modeled weights into evidence rather than opinion Make make-or-break metrics first-class engineering targets, starting with entity-resolution accuracy and calibration quality Extend the existing portfolio rather than rebuilding it, knowing precisely what to reuse and what must be net-new Lead zero-to-one work at production scale: turn an ambiguous, novel problem into a reliable system other teams build on, and set the bar where no precedent exists Drive technical direct

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