Senior Backend Engineer, Enterprise Readiness & Identity

About Us:At LangChain, our mission is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. We began as widely adopted open-source tools and have grown to also offer a platform for building, evaluating, deploying, and operating agents at scale.Today, LangChain, LangGraph, LangSmith, and Agent Builder are used by teams shipping real AI products across startups and large enterprises. Millions of developers trust LangChain to power AI teams at companies like Replit, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, and 35% of the Fortune 500.With $125M raised at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we’re at a stage where we’re continuing to develop new products, growth is accelerating, and all team members have meaningful impact on what we build and how we work together. LangChain is a place where your contributions can shape how this technology shows up in the real world.About the role:LangChain is hiring a Senior Backend Engineer focused on Enterprise Readiness & Identity to build the features that make our platform secure, compliant, and scalable for enterprise customers. This is a high-impact role on a newly formed team working at the intersection of authentication, authorization, billing, security, compliance, and tenant management. You’ll collaborate closely with infra, product, GTM, and our largest enterprise users to shape the foundation of our enterprise offerings. This role is in-person 5 days/week in New York City, San Francisco, or Boston.What you will do:Design and implement backend services (Python/Go) powering enterprise authentication, authorization, billing, and tenant provisioningBuild and evolve systems for SAML, SCIM, OAuth2, and single sign-on (SSO) integrationsDevelop robust role-based and attribute-based access control (RBAC/ABAC) models at org scaleBuild and scale billing infrastructure including invoicing, usage-based charging, and flexible pricing model supportImplement audit logging, usage tracking, and metering pipelines to support compliance and billing accuracyOptimize enterprise onboarding and tenant lifecycle management for reliability and scaleCollaborate with security and compliance teams to support SOC2, GDPR, and other regulatory requirementsPartner with infra engineers to ensure identity and enterprise features are performant, reliable, and observableEngage directly with enterprise customers to translate requirements into secure, scalable platform capabilitiesWrite clean, maintainable, and well-documented backend codeHow to be successful in this role:5+ years backend engineering experience with Python or Go (both preferred)Deep knowledge of authentication and identity standards (OAuth2, SAML, JWTs, SCIM)Experience building and scaling access control systems (RBAC, ABAC, permissions frameworks)Experience with billing and usage infrastructure in SaaS environmentsFamiliarity with Postgres, Redis, APIs, and modern distributed backend infraComfort navigating enterprise security, compliance, and multi-tenant architecturesStrong ownership mindset and ability to thrive in fast-paced, unstructured startup environmentsPrior experience building enterprise-grade SaaS or developer platformsBonus: background in security, observability, or developer infrastructureBonus: familiarity with LLMs, GenAI applications, or agentic frameworksCompensation & Benefits:We offer competitive compensation that includes base salary, meaningful equity, and benefits such as health and dental coverage, flexible vacation, a 401(k) plan, and life insurance. Actual compensation will vary based on role, level, and location. For team members in the EU and UK, we provide locally competitive benefits aligned with regional norms and regulations.Annual salary range: $175,000- $225,000