Senior Fullstack Engineer, Enterprise Readiness & Identity

About LangChain:

At LangChain, our mission is to make intelligent agents ubiquitous. We help developers build mission-critical AI applications across the entire agent development lifecycle. Our open source frameworks — LangChain and LangGraph — see over 70+ million downloads per month. Developers rely on LangChain for composable integrations and LangGraph for controllable agent orchestration. Our commercial agent platform, consisting of LangSmith and LangGraph Platform, enables teams to build, test, run, and manage agents at scale across their organization.Founded in 2023, LangChain powers top engineering teams at companies like Replit, Lovable, Clay, Klarna, LinkedIn, and more.

About the role:

LangChain is hiring a Fullstack 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, security, compliance, and admin tooling. You’ll collaborate closely with product, infra, GTM, and our largest enterprise users to shape the foundation of our enterprise offerings. As a Fullstack Engineer on this team, you’ll lead development of seamless, scalable flows for enterprise authentication and access control and contribute to the systems and tooling that make LangChain enterprise-ready by default. This role will be in person 5 days/week in New York City, San Francisco, or Boston.

What you will do:

• Build key enterprise features across our stack (TypeScript, Python, Go)

• Develop and evolve our billing infrastructure. Build the core system that powers invoicing and usage-based charges and enables flexible pricing model changes.

• Design and implement robust authentication and user provisioning flows (SAML, SCIM, OAuth2)

• Build role-based access control (RBAC) and permissions systems for enterprise teams

• Develop admin dashboards and org-level settings for audit logging, usage limits, and billing

• Implement granular metering and usage tracking to support LangChain’s largest customers

• Collaborate with internal teams on SOC2, GDPR, and other enterprise compliance needs

• Optimize enterprise onboarding and tenant provisioning for scale and ease of use

• Collaborate cross-functionally with product engineering, design, infra, security, GTM, and product

• Write clean, scalable, and well-documented code

• Work with enterprise customers to understand and translate their needs into secure, scalable platform capabilities

How to be successful in the role:

• Extensive fullstack software development experience using React, TypeScript, and Go and/or Python

• Deep knowledge of authentication and identity (OAuth2, SAML, JWTs, etc.)

• Experience building access control systems (RBAC, ABAC, etc.)

• Familiarity with APIs, Postgres, Redis, and modern backend infra

• Comfortable navigating security, compliance, and enterprise-scale architecture

• Startup DNA with the ability to thrive in fast-paced unstructured environments

• Self directed with an ownership mindset

• Experience building for enterprise customers and/or compliance-heavy environments

• Background in security, observability, or developer platforms would be a bonus

• Familiarity with LLMs, GenAI applications, or agentic frameworks would be a bonus