Principal Machine Learning Engineer

It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could do that for everyone—freeing people from busywork so they could focus on meaningful work. Today, ServiceNow is the AI control tower for business reinvention. Our ServiceNow AI platform brings together any AI, any data, and any workflow— helping 85% of the Fortune 500® work smarter, faster, and better. We're building an AI-native culture where technology and talent are unstoppable together. And we're just getting started.

Join us to put AI to work for people.

Job Description

About the team 

The Security and Risk Engineering organization builds scalable, AI-powered security solutions that reduce risk and protect ServiceNow and its customers. We value AI-first thinking, clean architecture, intuitive experiences, and a culture of continuous learning. 

This is a zero-to-one incubation. We’re building a new class of exposure analysis that ranks security work by exploitability—where an attacker could realistically get in—rather than raw severity. The architecture is evolving, and this role helps define what good looks like. 

The role 

As a Principal ML Engineer, you set the technical vision for exploitability-based security across the portfolio—not just one engine. You define the hardest modeling problems worth solving, set the direction other staff and senior engineers build within, and represent the work to executives, customers, and the broader engineering organization. 

What you’ll own 

• The technical vision and architecture for exploitability-driven security: where the engine goes next, and the class of problems it should solve beyond any single release. 
• The hardest unsolved modeling problems—how calibrated attack-path probability holds up across environments, how identity and agent surfaces enter the model, and how ground truth feeds back into it. 
• The engineering standards and architectural direction that multiple teams build within: scalability, reliability, and the scientific rigor of the scoring. 
• The build-on strategy across the portfolio: what the engine reuses from existing products, what must be net-new, and why. 

What you’ll do 

• Set technical direction across multiple teams without direct authority, and turn ambitious ideas into working, enterprise-grade products. 
• Explore and apply emerging AI to cybersecurity in fundamentally new ways—not simply bolt AI onto existing products. 
• Represent the team’s technology and innovation with executives, customers, partners, and the broader engineering organization. 
• Mentor staff and senior engineers, and raise the overall engineering bar through coaching and technical leadership. 
• Champion AI-native engineering practices, including extensive use of coding agents and autonomous development, testing, evaluation, and operational workflows. 
• Set the direction for AI safety, security, governance, and guardrails for agentic systems running in production. 

What you bring 

• Deep expertise in modern AI/ML with a track record of building production AI systems—LLMs, foundation models, agentic architectures, RAG, retrieval, and model evaluation—alongside probabilistic or ML-driven scoring. 
• The ability to set a compelling technical vision and drive it across teams, then go deep into architecture and code. 
• A proven record of turning ambitious, ambiguous ideas into products that scale to enterprise workloads. 
• An innovator’s mindset—challenging conventional approaches and seizing the openings created by rapidly evolving AI. 
• Command of distributed systems, APIs, cloud-native platforms, and data or graph systems. 
• Expert-level Python and modern AI frameworks and infrastructure; experience with Java, Go, or similar languages is valuable. 
• Executive-level communication: able to articulate a compelling technical vision to engineers, customers, and senior leadership. 
• Applied depth in security problems—threat detection, vulnerability and exposure management, identity security, risk prioritization, or autonomous remediation—is strongly preferred. 
• Extensive use of AI-native development tools and coding agents such as Claude Code, Codex, Cursor, or Windsurf across the software development lifecycle. 

Qualifications

• 15+ years of software engineering experience, including significant technical and engineering leadership responsibility. 
• Demonstrated experience designing and delivering AI/ML-powered products and platforms in production. 
• Experience leading technical initiatives spanning multiple teams without direct authority. 
• Demonstrated ability to design systems that scale to enterprise workloads. 
• Hands-on experience with frontier LLMs, agent frameworks, retrieval and vector technologies, and model evaluation and observability; probabilistic modeling or graph analytics is a strong plus. 
• Strong backend engineering experience with distributed systems, APIs, microservices, and cloud-native architectures. 
• Extensive experience using AI-native development tools and coding agents as part of the software development lifecycle. 
• Bachelor’s or Master’s degree in Computer Science, Artificial Intelligence, Machine Learning, or a related technical discipline, or equivalent practical experience. 
• Cybersecurity products, or deep familiarity with modern security architectures and security operations, is strongly preferred. 

 

For positions in this location, we offer a base pay of $240,100 - $420,200 , plus equity (when applicable), variable/incentive compensation and benefits. Sales positions generally offer a competitive On Target Earnings (OTE) incentive compensation structure. Please note that the base pay shown is a guideline, and individual total compensation will vary based on factors such as

qualifications

, skill level, competencies, and work location. We also offer health plans, including flexible spending accounts, a 401(k) Plan with company match, ESPP, matching donations, a flexible time away plan and family leave programs. Compensation is based on the geographic location in which the role is located and is subject to change based on work location.

Additional Information

Work Personas

We approach our distributed world of work with flexibility and trust. Work personas (flexible, remote, or required in office) are categories that are assigned to ServiceNow employees depending on the nature of their work and their assigned work location. Learn more here . To determine eligibility for a work persona, ServiceNow may confirm the distance between your primary residence and the closest ServiceNow office using a third-party service.

Equal Opportunity Employer

ServiceNow is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, national origin, age, disability, gender identity, veteran status, or any other category protected by law. In addition, all qualified applicants with arrest or conviction records will be considered for employment in accordance with legal requirements.  

Accommodations

We strive to create an accessible and inclusive experience for all candidates. If you require a reasonable accommodation to complete any part of the application process, or are unable to use this online application and need an alternative method to apply, please contact View email address on us.fitly.work for assistance. 

Export Control Regulations

For positions requiring access to controlled technology subject to export control regulations, including the U.S. Export Administration Regulations (EAR), ServiceNow may be required to obtain export control approval from government authorities for certain individuals. All employment is contingent upon ServiceNow obtaining any export license or other approval that may be required by relevant export control authorities. 

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