# Senior Backend Engineer, Enterprise Readiness & Identity

**Company:** [LangChain](https://hotfix.jobs/companies/langchain)
**Location:** New York, NY, San Francisco, CA, Boston, MA
**Role:** Backend Engineering
**Salary:** $175k – $225k/yr
**Experience:** 5+ years
**Skills:** Python, Go, Oauth2, SAML, SCIM, RBAC, Abac, Postgres, Redis, Jwts
**Posted:** 2026-01-08

> Builds secure backend services for enterprise authentication, authorization, billing, and tenant management using Python/Go. Requires 5+ years experience with identity standards (OAuth2, SAML, SCIM), access control (RBAC/ABAC), and SaaS infrastructure.

## Job Description

## What you will do
- Design and implement backend services (**Python/Go**) powering enterprise authentication, authorization, billing, and tenant provisioning
- Build and evolve systems for **SAML, SCIM, OAuth2**, and single sign-on (**SSO**) integrations
- Develop robust **role-based** and **attribute-based access control (RBAC/ABAC)** models at org scale
- Build and scale billing infrastructure including invoicing, usage-based charging, and flexible pricing model support
- Implement audit logging, usage tracking, and metering pipelines to support compliance and billing accuracy
- Optimize enterprise onboarding and tenant lifecycle management for reliability and scale
- Collaborate with security and compliance teams to support **SOC2, GDPR**, and other regulatory requirements
- Partner with infra engineers to ensure identity and enterprise features are performant, reliable, and observable
- Engage directly with enterprise customers to translate requirements into secure, scalable platform capabilities
- Write clean, maintainable, and well-documented backend code

## How 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 environments
- Familiarity with **Postgres, Redis, APIs**, and modern distributed backend infra

**Bonus:** background in security, observability, or developer infrastructure; familiarity with **LLMs, GenAI applications**, or agentic frameworks

## Compensation & Benefits
- Annual salary range: **$175,000-$225,000**
- Competitive base salary, meaningful equity, health/dental coverage, flexible vacation, 401(k), life insurance

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