About Anon
Anon is building the identity layer for the automated internet.Our developer toolkit enables AI agents to securely integrate with any service or application on behalf of users, powering the next generation of AI applications. Since launching in 2023, we've scaled to thousands of active developers and 50+ customers, including many leading AI agent companies, reaching tens of thousands of end-users.We've raised over $13M from top investors including Union Square Ventures and Abstract Ventures to pursue our vision of a world where billions of AI agents are authenticated and managed via Anon. To learn more about our mission, culture, and the type of candidates we hire, visit
careers.anon.com .About the Role
As a Senior Backend Engineer at Anon, you'll help build and scale our core infrastructure and APIs that power AI agent authentication across the internet. You'll be responsible for developing the systems that enable secure, reliable integration between AI applications and internet services, even when formal APIs don't exist. This role involves substantial technical depth and ownership as you help create the foundation for the next generation of AI applications.Key Responsibilities
Builder Mindset & Ownership
Take pride in building reliable, secure APIs that developers love to use
Own features end-to-end, from conception through deployment and maintenance
Actively identify and solve problems before they impact customers
Core Platform Development
Design and maintain scalable, secure APIs that power our suite of platform-specific SDKs
Implement networking features including traffic inspection, protocol-level request manipulation, and proxy systems
Engineer Kubernetes clusters and manage scalable browser runtime environments
Build and maintain robust data pipelines and infrastructure on GCP
Contribute to cryptographic protocol implementation and security infrastructure
Develop and maintain vendor integrations across authentication, database, and DevOps tools
Developer Experience
Create and maintain SDK documentation and sample applications
Manage API versioning and backwards compatibility
Support customer integration efforts and address technical challenges
Collaborate with product and frontend teams to improve developer experience
What We're Looking For
Technical Requirements
5-8+ years of experience
Strong proficiency in at least one of: TypeScript, Rust, or Go
Strong proficiency in TypeScript and Node.js ecosystem
Strong experience with REST API design, with GraphQL experience a plus
Familiarity with Kubernetes, microservice architecture, and cloud infrastructure
Experience with data engineering and building scalable data pipelines
Proven track record implementing and maintaining vendor integrations (e.g., Supabase, Stytch)
Experience with CI/CD pipelines and GitHub Actions
Strong background in security best practices and secrets management
Understanding of authentication protocols (OAuth2, OpenID Connect)
Experience with browser automation tools (Playwright, Puppeteer) is a plus
Knowledge of networking protocols (HTTP, TCP, TLS) is a plus
Culture and Mindset
Builder mentality with examples of shipped products or significant features
Self-motivated problem-solver who can work with incomplete information
Excellent communication skills and ability to work cross-functionally
Strong desire to learn and adapt in a fast-paced environment
Commitment to code quality and engineering best practices
Compensation & Benefits
Competitive salary with significant equity in a well-funded startup
Comprehensive health, dental, and vision insurance
Company-provided workstation setup of your choice
Free gym membership at your preferred location
In-person work environment and team events in San Francisco (Hayes Valley)
In Conclusion
We're looking for builders who want to define the future of AI authentication. Our team includes former founders and early startup employees who have scaled products from 0 to 1. If you're excited about building critical infrastructure for the AI ecosystem and working with an exceptional team, we want to talk to you.
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