Senior Systems Engineer: Application Security & Scale

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Apply for the Senior Systems Engineer: Application Security & Scale
Location: London
Job Description:

Cloudflare is seeking a Senior Systems Engineer – Application Security in London to design and deploy secure, scalable systems. You will work with Go or Rust, and operate alongside a security-focused team responsible for WAF, API Shield and related products.

Requires 5+ years of hands-on software development, strong Linux fundamentals, and experience with distributed systems. Hybrid in-office work two days a week in London, with global collaboration across teams.

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Posted: October 4th, 2026