Senior Platform Security Engineer — Cloud & Kubernetes

Ffive; San Jose (CA); On-site; USD 196,000 - 294,000; Full time

Job summary

F5 is building a secure, scalable multi-cloud platform and seeks a Senior Software Engineer to join the Platform Security team to design foundational security services protecting the distributed cloud. You will work on authentication, authorization, certificate, secret, and key management at scale across Kubernetes-based environments.

You will collaborate with product, SRE, and other engineering teams to deliver secure, reliable systems, mentored by senior engineers and contributing to security

Qualifications

• 6+ years of professional software development experience in C++, Java, or Golang (Golang strongly preferred).
• Advanced knowledge of and hands-on experience with Linux systems.
• Advanced, hands-on experience with Kubernetes.
• Proven experience building platform security services in at least one of: authentication, authorization, certificate management, secret management, or key management.
• Strong fundamentals in distributed systems, system design, and writing secure, reliable code.
• Hands-on experience with AI-assisted development tools (Copilot, Claude, Codex, or similar).
• U.S. Citizenship Required: Due to FedRAMP compliance obligations, this role requires the candidate to be a U.S. citizen.

Responsibilities

• Design, develop, and operate highly available platform security services that form the trust foundation of F5 Distributed Cloud.
• Build and enhance core security capabilities across authentication, authorization, certificate management, secret management, and key management.
• Write high-quality, production-grade code (Golang) for distributed, performance-sensitive systems.
• Deploy and operate services on Kubernetes across multi-cloud and edge environments.
• Collaborate with cross-functional teams—product, SRE, and other engineering groups—to deliver secure, scalable solutions.
• Participate in design reviews, code reviews, and threat modeling to uphold a high security and engineering bar.
• Contribute to compliance and audit readiness efforts (e.g., FedRAMP, PCI) for platform security services.
• Mentor junior engineers and help drive engineering best practices within the team.

Skills

Golang

C++

Java

Tools

Linux

Kubernetes

Job description

F5 is building a secure, scalable multi-cloud platform and seeks a Senior Software Engineer to join the Platform Security team to design foundational security services protecting the distributed cloud. You will work on authentication, authorization, certificate, secret, and key management at scale across Kubernetes-based environments.

You will collaborate with product, SRE, and other engineering teams to deliver secure, reliable systems, mentored by senior engineers and contributing to security