{"schemaVersion":"jobsearcher.job.v1","id":"820d2f3f5102a38c6a63f984","url":"https://jobsearcher.com/jobs/820d2f3f5102a38c6a63f984","canonicalUrl":"https://jobsearcher.com/jobs/820d2f3f5102a38c6a63f984","title":"Security Engineer","description":"Security Engineer (Infrastructure / Linux)Location: San Francisco, CA (Hybrid: 4 days onsite, 1 day WFH)Compensation: $180,000 – $210,000 baseEmployment: Full-timeVisa sponsorship: Not availableA well-funded client is seeking a senior Security Engineer to secure infrastructure that runs untrusted code at massive scale. This role is focused on Linux and infrastructure security, balancing strong isolation guarantees with high-performance requirements in a distributed environment.ResponsibilitiesSecure high-scale infrastructure executing untrusted workloadsDesign and implement defense-in-depth security for sandboxed and microVM-based systemsBuild real-time threat detection across large numbers of concurrent environmentsApply Linux security primitives to enforce isolation and runtime protectionEnsure compliance with enterprise security standards while maintaining low-latency performanceWhy is This a Great OpportunityCover full healthcare, vision, and dental insurance, and offer unlimited PTO.Series A startup with 7-figure revenueSmall team, real impactNote:Please highlight the must haves in the submittal. They have to have all the must haves to get an interview.Must have:Fast paced startup experience (ideally, seed to Series B) working on a small teamProficiency in Go, Rust, or TypeScript.Deep expertise in Linux security primitives (seccomp, eBPF, namespaces).Willingness to work 4 days onsite in San Francisco.5+ years of experience in production security infrastructure, securing distributed systems at scaleExperience securing distributed systems at massive scale.Experience with container security and microVM hardening.Like to haveComfortable implementing kernel-level security controls.Job Requirements:Qualifications5+ years of experience securing production infrastructureDeep hands-on experience with Linux security primitives such as seccomp, eBPF, and namespacesExperience securing distributed systems at scaleFamiliarity with compliance frameworks including SOC 2, ISO 27001, and GDPRComfortable working close to the system; kernel-level security experience is a plus#J-18808-Ljbffr","company":"Blocket Ab","rawCompany":"blocket ab","city":"Millbrae","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-04-09T07:58:17.780Z","occupations":[{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1299.05","title":"Information Security Engineers","slug":"information-security-engineers"},{"code":"15-1212.00","title":"Information Security Analysts","slug":"information-security-analysts"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541519","title":"Other Computer Related Services","slug":"other-computer-related-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Security Engineer","description":"Security Engineer (Infrastructure / Linux)Location: San Francisco, CA (Hybrid: 4 days onsite, 1 day WFH)Compensation: $180,000 – $210,000 baseEmployment: Full-timeVisa sponsorship: Not availableA well-funded client is seeking a senior Security Engineer to secure infrastructure that runs untrusted code at massive scale. This role is focused on Linux and infrastructure security, balancing strong isolation guarantees with high-performance requirements in a distributed environment.ResponsibilitiesSecure high-scale infrastructure executing untrusted workloadsDesign and implement defense-in-depth security for sandboxed and microVM-based systemsBuild real-time threat detection across large numbers of concurrent environmentsApply Linux security primitives to enforce isolation and runtime protectionEnsure compliance with enterprise security standards while maintaining low-latency performanceWhy is This a Great OpportunityCover full healthcare, vision, and dental insurance, and offer unlimited PTO.Series A startup with 7-figure revenueSmall team, real impactNote:Please highlight the must haves in the submittal. They have to have all the must haves to get an interview.Must have:Fast paced startup experience (ideally, seed to Series B) working on a small teamProficiency in Go, Rust, or TypeScript.Deep expertise in Linux security primitives (seccomp, eBPF, namespaces).Willingness to work 4 days onsite in San Francisco.5+ years of experience in production security infrastructure, securing distributed systems at scaleExperience securing distributed systems at massive scale.Experience with container security and microVM hardening.Like to haveComfortable implementing kernel-level security controls.Job Requirements:Qualifications5+ years of experience securing production infrastructureDeep hands-on experience with Linux security primitives such as seccomp, eBPF, and namespacesExperience securing distributed systems at scaleFamiliarity with compliance frameworks including SOC 2, ISO 27001, and GDPRComfortable working close to the system; kernel-level security experience is a plus#J-18808-Ljbffr","datePosted":"2026-04-09T07:58:17.780Z","dateModified":"2026-04-09T07:58:17.780Z","hiringOrganization":{"@type":"Organization","name":"Blocket Ab","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Millbrae","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"820d2f3f5102a38c6a63f984"},"url":"https://jobsearcher.com/jobs/820d2f3f5102a38c6a63f984"}}