Principal AI Platform Engineer

Our Purpose At SentinelOne, we are driven by a clear purpose: to give the advantage to those who secure our future. As AI reshapes how organizations build, operate, and innovate, the responsibility to protect them becomes more critical than ever. When you join SentinelOne, your work helps protect global enterprises, critical infrastructure, and the technologies shaping tomorrow. If you are motivated by meaningful challenges and want your impact to be real, measurable, and global, you will find purpose here. About Us SentinelOne is a company at the intersection of AI and security, pioneering a new operating model for cybersecurity. Our AI-native platform unifies protection across endpoint, cloud, identity, data, and AI systems to deliver autonomous detection and response with clarity and speed. By combining real-time analytics, intelligent automation, and a unified data foundation, we reduce noise, simplify complexity, and empower security teams to focus on what truly matters. Our teams are builders, problem-solvers, and innovators committed to shaping the future of security. If you are excited to solve hard problems alongside talented, mission-driven people, we invite you to help us build a safer future for humanity. What Are We Looking For? We’re looking for people who are relentlessly curious and committed to continuous learning. AI is reshaping every function across our business, and we enable every team member, regardless of role or level, to build fluency in AI tools and concepts. Those who thrive here actively seek out new solutions, experiment thoughtfully, and apply what they learn to drive better, faster, smarter outcomes. SentinelOne is building a new AI Platform team whose mission is to accelerate AI feature delivery across the company while ensuring every AI feature meets our security, cost, and quality standards. We are looking for a Principal Engineer to be the founding technical leader of this team: you will partner directly with the team's engineering leader to define the technical vision and roadmap for the platform that every AI-powered capability at SentinelOne will build on. SentinelOne already ships AI at scale - from our patented detection models to Purple AI, our industry-awarded generative AI security analyst - and your challenge is to turn these proven but distributed capabilities into one coherent platform: deciding what to reuse, what to rebuild, and what to create new. This role is as much about product as it is about platform: you should be able to build AI experiences customers love, and then platformize what was built into capabilities that every team can reuse. If you want your technical judgment to set the direction of AI at a leading cybersecurity company, this is a role for you. What Will You Do? Primary responsibilities include: Define the technical vision and multi-year roadmap for SentinelOne's AI Platform (model gateway/routing - using tools like e.g. Kong; agent/MCP infrastructure, evaluation pipelines, AI observability) in partnership with engineering leadership. Serve as the tech lead by owning architecture decisions, setting engineering standards, reviewing critical designs, and guiding implementation across the team without people management responsibilities. Support business-critical AI initiatives, partnering with product and engineering leaders to translate business strategy into platform capabilities and clear engineering priorities. Partner with product teams to build customer-facing AI experiences hands-on, then platformize what was built into shared, reusable capabilities. Drive technology selection and build-vs-buy decisions for the platform's core stack, weighing security, cost, scalability, and time-to-value. Mentor senior engineers across the organization and act as a recognized expert on AI infrastructure within and beyond the company. What Skills and Knowledge Will You Bring? Ideal candidates will have: 12+ years of experience building and operating large-scale distributed systems, including several years driving the architecture of platform or infrastructure products used by multiple teams. 2+ years hands-on experience taking LLM-based systems to production (e.g., model integration and routing, retrieval or agent architectures, evaluation harnesses, and cost/latency/quality optimization). Strong hands-on coding skills in a mainstream backend language (e.g., Python or Go) and deep experience with Kubernetes and cloud infrastructure (AWS and/or GCP). Strong product acumen with experience building world-class customer-facing products, translating customer needs into technical decisions, and engaging business stakeholders. Proven track record as a tech lead of cross-team initiatives with ambiguous requirements, turning vague business goals into a sequenced technical roadmap. Why SentinelOne? AI is redefining how the world operates and rewriting the rules of security in real time, and SentinelOne was built for this mom