A

Anthropic

Builds Claude AI models with a focus on safety

Staff+ Software Engineer - Platform Connectivity

Full-Time
$405k - $485k/yr
Senior
Bachelor's
London, UK+1 moreMore locations: San Francisco, CA, USA
HybridStaff are expected to work from an office at least 25% of the time.
Software EngineeringBackend Engineering
H1B Sponsorship Available

About the job

Requirements
  • Experience as a backend or platform engineer.
  • Familiarity with using AI tools as part of the software development process.
  • Ability to take a product-focused approach to platform work and build robust, scalable, easy-to-use solutions.
  • Ability to own work from design through build, deployment, and operations, including iterating on and improving the product.
  • Ability to navigate ambiguity and make sound technical decisions independently; experience in both 0-to-1 and more mature team or company settings is desirable.
  • Experience operating production distributed systems, with an understanding of reliability, observability, and incident response at scale.
  • Ability to build consensus across teams and time zones.
  • Bachelor’s degree, or an equivalent combination of education, training, and/or experience. The field of study must be relevant to the role, as demonstrated through coursework, training, or professional experience.
  • Minimum years of experience will correlate with the internal job level requirements for the position.
Responsibilities
  • Design, build, and operate the core connectivity infrastructure behind external tool calls, including the MCP proxy and OAuth and token management systems that keep connections authenticated.
  • Own reliability for infrastructure that other teams and external partners depend on, including SLOs, on-call, incident response, and postmortems.
  • Build admin controls and permission models that let enterprise IT govern what agents can do.
  • Contribute to the MCP standard and its ecosystem, including the specification and official Python and TypeScript SDKs.
  • Turn ambiguous outcomes into shipped, scoped work and dogfood what is built in the products that consume it.
  • Independently scope complex, multi-month projects, drive cross-organizational alignment through ambiguous problem spaces, and make architectural decisions that shape how Anthropic builds and scales its products.
  • Partner directly with research to productize cutting-edge capabilities.
Desired Qualifications
  • Experience operating in both 0-to-1 and more mature team or company settings is desirable.

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%
CNBC
Oct 21st, 2026
Anthropic previews Claude Duet, a proactive AI agent rivalling Meta's Muse and OpenAI's Dots

Anthropic on Wednesday announced a preview of Claude Duet, an AI agent for small businesses and professionals. It can send daily briefs, keep tabs on connected apps, and carry out tasks such as building dashboards, scheduling meetings, and creating financial forecasts. The launch follows Meta's Muse, which topped Apple's App Store after its launch last month, and OpenAI's Dots. Meta chief executive officer Mark Zuckerberg said more than 10 million people in the US and Canada have set up Muse agents. Anthropic said Duet is still early and "might misread a thread or miscalibrate what's urgent." Personal errands, such as booking tickets, are not "quite as strong." A waitlist is open. Pro and Max subscribers can use the preview through a standalone app or the Claude website.

Fortune
Oct 21st, 2026
Eric Schmidt's 1% Anthropic stake could be worth $20B, thanks to an introduction from his ex

Eric Schmidt's early bet on Anthropic could be worth as much as $20 billion if the AI company goes public at its $2 trillion target, Bloomberg reported. The former Google chief executive officer reportedly owns a 1% stake, and the listing could come as soon as next month. Schmidt's link to Anthropic came through Cami Clark, whom he dated for three years from 2011. She later married Anthropic co-founder Dario Amodei and introduced the two men. Schmidt joined Anthropic's $124 million Series A round in 2021, investing tens of millions, sources said. PitchBook data valued the company at $461 million then; it is now valued at $965 billion. Anthropic made $16.3 billion in revenue in the first half of this year, up from $1.1 billion a year earlier.

Fortune
Oct 21st, 2026
Anthropic adds Harvard astrophysicist to trust that elects its board majority ahead of IPO

Anthropic has named Harvard University astrophysicist Christopher Stubbs to its Long-Term Benefit Trust, which can elect a majority of the AI company's board. The arrangement may face more pressure if Anthropic goes public, as widely expected as soon as next month. Stubbs helped show that the universe's expansion is accelerating, and shared the 2015 Breakthrough Prize in Fundamental Physics. He is the first physicist on the Trust and fills one of two open seats. He joins Neil Buddy Shah, Richard Fontaine, and Ben Bernanke. Reports suggest the IPO could value Anthropic at more than $2 trillion; it was valued at $965 billion in a May funding round. Last weekend, Anthropic said it would put 5% of its shares into a new Public Benefit Fund, separate from the Trust.

Business Insider
Oct 21st, 2026
Amodei defends Anthropic's "race to the top" in 2,000-word reply to safety critic

Anthropic chief executive officer Dario Amodei has defended the company's "race to the top" strategy after a critic said it was putting AI safety in the back seat. On Tuesday, he published a response of nearly 2,000 words to an X post by Nathan Calvin, chief strategy officer of nonprofit Encode AI. Calvin listed nine actions he said undermined Anthropic's safety commitments, including deals for more than $500 billion in compute and growing reliance on Claude to build its models. Amodei said Anthropic can do more for industry safety by staying at the frontier. He listed nine costly choices with safety benefits, such as limiting its Mythos model to select cybersecurity partners. He conceded the company could have handled some issues better, including a draft bill circulated to Congress. Anthropic is reportedly nearing an IPO at a $2 trillion valuation in November. It reported third-quarter revenue of $16.8 billion.

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.