A

Anthropic

Builds Claude AI models with a focus on safety

Platform Security Engineering - Operating Systems

Full-Time
$320k - $405k/yr
Mid
Bachelor's
Seattle, WA, USA+2 moreMore locations: San Francisco, CA, USA | New York, NY, USA
HybridAt least 25% of the time in an office is expected.
CybersecuritySecurity Engineering & Architecture
H1B Sponsorship Available

About the job

Requirements
  • Deep knowledge of Linux internals, including kernel subsystems and security frameworks such as SELinux, AppArmor, and seccomp.
  • Experience with kernel hardening techniques and exploit mitigation.
  • Strong programming skills in C and systems programming languages.
  • Experience with eBPF for security monitoring and enforcement.
  • Understanding of virtualization and containerization security.
  • A track record of identifying and fixing operating-system-level security vulnerabilities.
  • Experience with security-focused Linux distributions.
Responsibilities
  • Design and implement hardened operating-system configurations for AI workloads across diverse hardware platforms.
  • Minimize attack surfaces by removing unnecessary components from kernelspace and userspace.
  • Develop kernel security policies using SELinux, AppArmor, custom Linux Security Modules, and runtime enforcement mechanisms.
  • Implement and maintain full-disk encryption solutions for diverse storage systems.
  • Build security infrastructure for AI systems, research environments, and production services.
  • Create operating-system-level attestation and integrity monitoring systems.
  • Apply security patches, develop patches for custom kernel modules, and create kernel-hardening configurations.
  • Design secure boot processes and trusted execution environments.
  • Work with container teams to ensure proper workload isolation at the kernel level.
  • Design privilege separation and mandatory access control policies.
  • Implement secure update mechanisms for operating-system components.
  • Build tooling for security configuration management and compliance verification.
  • Serve as a subject matter expert for operating-system security questions and designs.
Desired Qualifications
  • Five or more years of experience in operating systems security or kernel development.
  • Kernel development experience or contributions to the Linux kernel.
  • Experience with real-time or embedded operating systems.
  • Knowledge of hardware security features and their operating-system integration.
  • Experience with secure boot technologies.
  • Experience with confidential computing and memory encryption technologies such as SEV, TDX, and SGX.
  • Background in vulnerability research, exploit development, or fuzzing.
  • Experience with formal methods for operating-system verification.
  • Knowledge of hardware security features and their operating-system integration, including TPM, HSM, and secure enclaves.

About the company

Anthropic builds the Claude family of AI models and sells them to businesses, software developers, and consumers, with research on making AI safe and understandable at the center of its work. In 2024 it introduced the Model Context Protocol, an open standard for connecting AI assistants to outside apps and data that OpenAI and Google adopted the next year. People use the Claude app to write and analyze files, programmers hand coding tasks to Claude Code, and companies build Claude into their own products through its API. Anthropic earns money from subscriptions, business plans, and usage-based API fees. Siblings Dario and Daniela Amodei founded Anthropic in 2021 with other former OpenAI employees, and it is based in San Francisco.

Company Size

5,001-10,000

Company Stage

N/A

Total Funding

$224.8B

Headquarters

San Francisco, California

Founded

2021

Get referred to Anthropic

See people who can refer or advise you

Simplify Jobs

Simplify's Take

What believers are saying

  • Sales are multiplying: Anthropic's yearly revenue pace topped $65 billion in July 2026, over sevenfold since December 2025.
  • IPO plans advanced: October 2026 reports describe investor meetings and a mid-November listing target; staff shares face lockups.
  • Lower office minimum: 627 of 646 Anthropic job posts in October 2026 require at least 25% office time.

What critics are saying

  • Job security rides on growth: Anthropic's IPO prospectus lists $518 billion in cloud and computing bills due in coming years.
  • Defense work stays off-limits: in September 2026, appeals judges voted 2-1 to let the Pentagon keep blacklisting Anthropic.
  • Growth is priced in: Anthropic's valuation reached $965 billion in May 2026, up from $380 billion in February.

What makes Anthropic unique

  • Investors don't control its board alone: Anthropic's independent Long-Term Benefit Trust elects a growing number of directors.
  • It isn't tied to one chipmaker: Claude runs on Nvidia GPUs plus custom AI chips designed by Google and Amazon.
  • It holds back its riskiest model: Claude Mythos 5.1, launched September 2026, goes only to vetted cyberdefenders and life scientists.

Help us improve and share your feedback! Did you find this helpful?

Benefits

  • Flexible Work Hours
  • Paid Vacation
  • Parental Leave
  • Hybrid Work Options
  • Company Equity

Growth & Insights and Company News

Headcount

6 month growth

-3%

1 year growth

2%

2 year growth

-3%
Yahoo Finance
Oct 21st, 2026
Musk pledges SpaceX shares to every US child, a day after Anthropic's 5% fund

Elon Musk said on X on Monday that next year he would give every child in America one SpaceX share. He called the donations "the first of many." The post drew over 33 million views in a day. President Donald Trump thanked Musk for his "incredible generosity." No plan has emerged. Musk did not explain the pledge on SpaceX's Tuesday earnings call, where the company reported a 161% rise in revenue from a year earlier. He hinted the shares could go through the new "Trump Accounts" program, which CNBC said may limit when recipients can sell. The pledge came one day after rival Anthropic announced a "Public Benefit Fund" and plans to donate 5% of its shares to it. Musk suggested Anthropic give shares "directly to the public," then said four hours later, "This is what I will be doing.

TechCrunch
Oct 20th, 2026
Anthropic's S-1 reveals $750B cloud spend and capacity struggles with AWS, Google and Microsoft

Anthropic is struggling to secure enough cloud capacity from AWS, Google, and Microsoft, which increasingly see it as a competitor rather than a customer. That is according to an S-1 filing leaked to The Wall Street Journal. The filing says Anthropic believes it could spend more than $750 billion on cloud contracts, some still in negotiation. It is also leasing its own data centres and using third-party operators, but worries their "limited operating history" could make them less reliable than the big cloud providers. Anthropic posted an $80.7 billion net loss in the first half of the year on $16.3 billion in revenue. Two customers account for about a fifth of sales. The company told investors third-quarter revenue reached $16.8 billion, up 45% from the previous quarter. It is reportedly targeting a November IPO.

Yahoo Finance
Oct 20th, 2026
Anthropic's $80.7B first-half net loss shouldn't deter IPO investors, strategist says

Anthropic has disclosed about $80.7 billion in net losses for the first half of 2026 in a draft filing for an initial public offering (IPO), according to reports from the Wall Street Journal and Reuters. B. Riley Wealth chief market strategist Art Hogan says the losses are no surprise. Revenue growth has slowed a little, he said, while spending on infrastructure has not. Hogan expects Anthropic to stress its strong revenue growth and to aim to list before Thanksgiving. He said OpenAI is likely to follow next year, and that SpaceX will be watching the same pool of investors. Investors will watch whether revenue growth keeps outpacing computing costs.

Bloomberg
Oct 20th, 2026
Anthropic S1 reportedly shows $80.7B first-half loss and up to $750B in planned computing spend

Anthropic PBC lost $80.7 billion in the first half of this year and could spend $750 billion on additional computing power in the coming years, the Wall Street Journal reported. The newspaper said it obtained a copy of the company's S1 filing as Anthropic prepares to go public.

Associated Press
Oct 20th, 2026
isolved Connector for Claude now covers full employee lifecycle, from pay checks to missed punches

isolved, a Workforce Capital Management company, has expanded its isolved Connector for Claude to cover the full employee lifecycle. Employees can now update contact information, get notifications, submit a missed punch, and manage timecard adjustments inside Claude. The connector launched in June. It lets employees check pay history, paystubs, time-off balances, and enrolled benefits without logging into a separate portal. Before any change is submitted, it shows what will change and asks for confirmation. Pay and benefits records are view-only. The company's 2026 HR Leaders Report found that 48% of HR leaders spend one to three hours a day answering repetitive employee questions, and 47% spend four hours or more. Next, isolved plans to add manager workflows, HR and administrator tools, and agentic experiences.