At a Glance
- Tasks: Lead the technical direction for the Claude API and drive high-impact engineering initiatives.
- Company: Join Anthropic, a leader in AI technology with a focus on innovation and collaboration.
- Benefits: Enjoy comprehensive health insurance, flexible time off, and competitive salary packages.
- Other info: Hybrid work policy with opportunities for professional growth and mentorship.
- Why this job: Make a real impact in AI by shaping the future of API technology.
- Qualifications: 12+ years of engineering experience and expertise in distributed systems and API architecture.
The predicted salary is between 500 - 500 £ per month.
- Anthropic is seeking an exceptional Senior Staff Software Engineer to join the Claude Developer Platform team and serve as the senior-most individual contributor across API Engineering.
Since launch, the Claude API has seen rapid growth and adoption by companies of all sizes to build AI applications with our industry-leading models
- The API serves as the primary channel for safely and broadly distributing AI's benefits across all sectors of the economy
- This role sets the technical direction for the systems that make Claude accessible to developers, enterprises, and partners at scale
- You will operate at the intersection of technical strategy and execution, partnering closely with Research, Inference, Platform, Infrastructure, and Safeguards to ensure the Claude API is reliable, capable, and positioned to grow with Anthropic's ambitions
- This is a high-agency role that spans all API Engineering teams: API Core owns the foundational reliability and performance of the Claude API; API Capabilities ships frontier model capabilities - vision, tool use, computer use - directly to developers; API Knowledge builds retrieval and grounding systems that let Claude reason over external data; API Distributability ensures Claude reaches customers wherever they need it, with the enterprise-ready infrastructure to support it; and API Agents builds the infrastructure for long-horizon agentic workflows in production
- Define and drive multi-year technical strategy for the Claude API, setting direction across API Core, Capabilities, Knowledge, Distributability, and Agents
- Identify and personally lead the highest-complexity, highest-impact engineering initiatives spanning multiple teams
- Serve as the primary technical decision-maker for major architectural decisions with org-wide scope
- Partner with Research to evaluate and integrate frontier capabilities; work with Inference and Platform for reliable delivery at scale; collaborate with Infrastructure and Safeguards for reliability, security, and responsible deployment
- Mentor and develop Staff-level engineers across the org
- Drive alignment across Product, GTM, Safety, and beyond while proactively identifying and addressing systemic technical risks
• Technical Stack
- Languages: Python, Type Script
- Frameworks: Fast API, React
- Infrastructure: GCP, Kubernetes, Cloud Run, AWS, Azure
- Databases: Postgre SQL (Alloy DB), Vector Stores, Firestore
- Tools: Feature Flagging, Prometheus, Grafana, Datadog
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 deep expertise in distributed systems and API architecture, and are effective writing design docs, making architectural calls, and coding in critical paths Have 12+ years of engineering experience with a clear track record operating at Staff or Senior Staff level Have demonstrably shaped technical strategy for large-scale API or distributed systems platforms Drive the highest-leverage technical outcomes without formal authority—you lead through influence, quality of thinking, and trust Bring strong product instincts and a craftsperson’s approach to API design; you communicate clearly with both technical and non-technical audiences Are highly effective across org boundaries—you build trust with Research, Inference, Infrastructure, Safeguards, and business stakeholders alike
Location-based hybrid policy: Currently, we expect all staff to be in one of our offices at least 25% of the time.
However, some roles may require more time in our offices Education requirements: We require at least a Bachelor's degree in a related field or equivalent experience
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Senior Staff Software Engineer (API) employer: Anthropic
At Anthropic, we pride ourselves on being an exceptional employer that fosters a culture of innovation and collaboration. Our team-oriented environment encourages personal growth and empowers employees to take ownership of their projects, making a meaningful impact in the tech landscape. Located in a vibrant area, we offer competitive benefits and unique opportunities for professional development, ensuring that our engineers thrive both personally and professionally.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Staff Software Engineer (API)
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Anthropic or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Anthropic.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Anthropic.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Anthropic that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Staff Software Engineer (API)
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Anthropic.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Anthropic and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Anthropic
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Anthropic uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
