Senior Staff Software Engineer (Java) - Platform org

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. As a Senior Staff Software Engineer , you will be tasked with driving the transformation of one of our core systems into a scalable modern microservices architecture and defining the next generation of our platform. In this high-visibility, high-impact role, you will lead an ambitious initiative to break down a complex cloudbased monolithic system, written primarily in Python, into a scalable, multi-tenant, cloud-native set of services (primarily in modern Java for new development; you may also meet Go as a secondary language in newer parts of the codebase). You will collaborate across the SentinelOne engineering organization with multiple engineering and product management leaders to design solutions capable of handling global SaaS scale processing petabytes of data and hundreds of billions of events. What Will You Do? Primary responsibilities include: Dive deep into our current monolithic architecture, identify pain points, and design innovative solutions to address them in an iterative way. Lead the design and development of a new microservices architecture that supports scalability, maintainability, and operational excellence. Collaborate with departments and teams to evaluate and implement the right tools, frameworks, and methodologies for building a robust microservices ecosystem. Readiness to "get your hands dirty" by developing POCs and prototypes, performing code reviews and contributing to high-quality, production-ready code (primarily in Java). Guide and mentor other engineers, contribute to their professional growth, share best practices and architectural insights, and foster a culture of engineering excellence, collaboration, and innovation. Partner with other engineering organizations and teams across the globe, with product, design, quality, DevOps/Infra teams and leadership to align on objectives, design, timelines, and execution strategies. Our Platform stack: Java (primary; Spring (Boot) ecosystem), Go (secondary), and Python (legacy); Kubernetes, Docker, AWS, GCP, FedRAMP; GitHub Actions, ArgoCD; GitHub Enterprise; depending on requirements of the service for communication we use Kafka, REST API, GraphQL, gRPC etc.; Postgres, MongoDB, Redis, ClickHouse; Prometheus/Thanos, Grafana; Claude Code, AI gateway, and other relevant agentic engineering tooling What Skills and Knowledge Wi…