Staff+ Full-stack Software Engineer

Anthropic; York and North Yorkshire; Hybrid; GBP 95,000 - 130,000; Full time

Benefits offered by this job

Health and safety focus

Comprehensive insurance

Relocation support

Education stipend

Office meals

Job summary

Anthropic is seeking senior full-stack engineers to own critical products and platforms that power Claude.ai, the Anthropic API, and enterprise deployments. You’ll shape end-to-end experiences, improve performance and reliability, and scale features to millions of users while collaborating across product, design, research, and GTM teams.

You’ll contribute to frontend and backend systems, build developer tooling and observability, and help drive adoption of AI-powered capabilities with guardrails

Qualifications

• 8-10+ years of practical full-stack engineering experience.
• Experience in building developer-facing products, APIs, or tooling.
• Hands-on with REST APIs and modern frontend frameworks.

Responsibilities

• Own technical quality across the stack, from frontend to backend.
• Collaborate with product, design, and research to ship user-facing features.
• Lead cross-team initiatives and ensure robust, scalable solutions.

Skills

Full-stack engineering

React

TypeScript

REST APIs

Education

Bachelor’s degree or equivalent

Job description

• Anthropic’s Product Engineering org is looking for experienced engineers with strong full-stack fundamentals to join one of teams owning our current or emergent products
• You’ll be a technical leader who thinks holistically about the consumer and/or enterprise end user experience - be that via Claude.ai, the Anthropic API, enterprise deployments, Claude Code, or mission-driven applications - and carry real end-to-end ownership
• You’ll partner with engineering managers, product leaders, designers, and researchers to understand new model capabilities and redefine what is possible for users in the world of LLMs - and how to build it
• We’ll look to you to have a product-oriented mindset and input, own technical quality across the stack (performance, accessibility, reliability, and developer experience), scale your efforts to millions of users on a global scale, and carry genuine excitement about what AI makes possible
• We have multiple teams that are currently hiring. Team placement occurs after the interview process, taking into account your interests and experience alongside organizational needs. This flexible approach allows us to match talented engineers with the backend product efforts where they’ll have the greatest impact and growth potential
• Developer Experience: You’ll build the products and tools - console, SDKs, docs, and observability - that give developers the confidence to rely on Claude in their most critical applications. Our mission is to meet developers where they are and bring them closer to the ceiling of what’s possible with our models and API
• That means building trust through great platform fundamentals, inspiring developers to raise the bar in how they use Claude’s capabilities, and accelerating the path to agentic development by designing for both human and AI developers
• You’ll work closely with teams across the Platform org to turn Claude’s newest capabilities into experiences developers can actually pick up and run with - from first prompt to production agent
• Beneficial Deployments: Beneficial Deployments Engineering brings Claude to organizations doing the most good with the fewest resources — nonprofits, schools, healthcare providers, researchers, and economic mobility programs
• We’re looking for a full-stack engineer to build the access programs, tooling, and product work that make frontier AI usable for teams that couldn’t afford this capacity any other way
• Enterprise AI Products: You’ll work on the products that make Claude a daily-use tool for enterprise customers across industries – the connective tissue that lets Claude operate effectively across workflows
• On this team you will systematically understand why Enterprise users aren’t activating, what’s blocking adoption, and building the capabilities to close those gaps.Some of our focuses are:
• Extensibility — plugins, skills, connectors, and the MCP ecosystem that lets a company shape Claude around their specific workflows and distribute that work across teams
• Context — enterprise knowledge, organizational memory, and the retrieval layer that makes Claude genuinely aware of a company’s people, documents, and workflows. A connected, contextual Claude is the difference between a general-purpose chatbot and a real coworker
• Proactivity — Cowork suggestions, workflow capture, ambient Claude inside the apps people already use. Moving from “Claude answers when asked” to “Claude notices what you need”
• Vertical AI Products: Purpose-built experiences for specific industries where Claude can transform complex professional work. We’re currently building for three verticals, with more to come:
• Financial Services — analysts and bankers building models, memos, and decks under deadline. We’re building retrieval, analysis, and document generation that holds up to executive review
• Healthcare — clinical documentation, prior auth, and care coordination. Work where accuracy isn’t a feature, it’s the whole product — and where compliance is part of the engineering
• Legal — contract analysis, document review, and matter management for teams that will read every word we generate and know immediately if it’s wrong
• Enterprise Foundations: You’ll build the systems large organizations require before they can adopt Claude at scale: identity and permissions, security and compliance controls, and the admin analytics that let them see how it’s being used
• This is the work that turns “we love the demo” into a signed enterprise deal.The role is part product, part platform. You’ll work closely with Product and GTM to understand what our largest customers need, then build it once in a way that works across Claude.ai, Claude Code, and Cowork
• Growth: Drive user acquisition, engagement, retention, and monetization through data-driven strategies and technical implementations. At Anthropic, we’re not just building AI tools; we’re reimagining how AI can enhance and expand its user base!
• As a member of the growth team, you will have a unique opportunity to shape our growth strategy. You will work with a cross-functional team of engineers, data scientists, marketers, and product managers to design, implement, and optimize growth initiatives that scale our AI-powered tools and maximize their impact

Benefits

• Comprehensive health, dental, and vision insurance for you and your dependents
• Inclusive fertility benefits via Carrot Fertility
• 22 weeks of paid parental leave
• Flexible paid time off and absence policies
• Mental health support for you and your dependents
• Competitive salary and equity packages
• Optional equity donation matching at a 1:1 ratio, up to 25% of your equity grant
• Retirement plans with competitive matching
• Life and income protection plans
• $500/month flexible wellness and time saver stipend
• Commuter benefits
• Annual education stipend
• Home office stipends
• Relocation support for those moving for Anthropic
• Daily meals and snacks in the office

Have led the design and delivery of complex, consumer or B2B user-facing products across the full stack Thrive in fast-paced environments and can navigate ambiguity to deliver high-quality products Take a product-focused approach to building solutions that are robust, scalable, and easy to use Are a technical expert in modern frontend and backend development, with demonstrated depth in key languages and frameworks (ie. React, Typescript)Have worked in early start-up or otherwise fast moving, rapidly evolving environments, and have ideally built products from 0 to 1Have successfully driven cross-team/cross-org organizational alignment to get impactful work shipped, and work with influence over authorityCare deeply in investing in the mentorship and growth of your peersHave 8-10+ years of practical full-stack engineering experience, ideally with 2+ years operating at a Staff or equivalent technical leadership levelHave experience establishing engineering standards, component architectures, and development best practicesHands-on experience with LLMs, prompt engineering, or building AI-native product features — and an intuition for where models are reliable vs. where they need guardrailsPrior work on growth, activation, or experimentation — A/B testing, funnel analysis, and a data-driven approach to product iterationMinimum years of experience: Years of experience required will correlate with the internal job level requirements for the positionDomain depth in a regulated or mission-critical context: enterprise, healthcare, legal, financial services, or accessibility-focused products where quality and compliance constraints are realMinimum education: Bachelor’s degree or an equivalent combination of education, training, and/or experienceExperience building developer-facing products, APIs, or tooling, with a feel for what good developer experience looks likeRequired field of study: A field relevant to the role as demonstrated through coursework, training, or professional experienceHave experience with REST APIsHave experience with React and frontend frameworksNot all strong candidates will meet every single qualification as listedResearch shows that people who identify as being from underrepresented groups are more prone to experiencing imposter syndrome and doubting the strength of their candidacy, so we urge you not to exclude yourself prematurely and to submit an application if you’re interested in this work