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Senior Product Security Software Engineer

United States, San Francisco 175000.00 - 215000.00 USD / Year · Job Posted February 21, 2026
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Job Description

Crusoe is building the infrastructure for the next era of AI and high-performance computing; and we're looking for someone to make sure it's built securely from the ground up. As part of the Product Security team, you won't just be securing the future, you'll be building it, working closely with engineering teams, shipping production code, designing secure architectures, and creating the security foundations that protect our platform at scale. This is a high-impact role where you'll shape how security is practiced across the company, not by saying "no," but by making the secure path the easy path. We're seeking a Senior Product Security Software Engineer who is first and foremost a skilled software engineer with AI expertise. You'll design secure systems, build security controls that integrate seamlessly into developer workflows, and help raise the security bar across our AI infrastructure and distributed systems, all while maintaining a pragmatic, delivery-focused mindset.

Job Responsibility

  • Design and build secure frameworks and patterns for high-performance AI workflows, agents, and models to protect our clients
  • Create reusable security patterns for product microservices, focusing on service-to-service authorization, API security, and multi-tenant data isolation that scales across product lines
  • Create developer-facing tools and automation that catch security issues early in the development cycle without slowing teams down
  • Perform security reviews, penetration tests, code reviews, and system design reviews for Crusoe’s fleet of SaaS offerings

Requirements

  • 7+ years of experience shipping production software with strong system design skills
  • Deep expertise in Golang and Node.js/JavaScript, with experience building and debugging distributed systems
  • Hands-on experience securing gRPC services, REST APIs, and microservice architectures
  • Strong background implementing authentication and authorization systems using OAuth2, OIDC, SAML, JWT, and RBAC/ABAC models
  • Production experience with application security tooling (SAST, DAST, SCA) and CI/CD integration (e.g., Semgrep, OWASP ZAP, Burp, GitLab)
  • Knowledge of runtime application security and observability tools
  • Solid understanding of cloud-native and containerized environments (Docker, Kubernetes) and network security fundamentals
  • Strong grasp of OWASP Top 10, secure coding practices, cryptography, and secure design principles

Nice to have

  • Experience building reusable security frameworks or internal developer platforms
  • Background in platform or infrastructure-adjacent security engineering
  • Experience influencing security practices across multiple engineering teams
  • Familiarity with supply chain security and dependency risk management

What we offer

  • Restricted Stock Units in a fast growing, well-funded technology company
  • Health insurance package options that include HDHP and PPO, vision, and dental for you and your dependents
  • Employer contributions to HSA accounts
  • Paid Parental Leave
  • Paid life insurance, short-term and long-term disability
  • Teladoc
  • 401(k) with a 100% match up to 4% of salary
  • Generous paid time off and holiday schedule
  • Cell phone reimbursement
  • Tuition reimbursement
  • Subscription to the Calm app
  • MetLife Legal
  • Company paid commuter benefit
  • $300 per month

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