# Senior Backend Engineer, Enterprise Billing Platform

Hiring organization: [LangChain](https://career.thegoodapps.co/organizations/langchain)

Canonical page: https://career.thegoodapps.co/jobs/03d1e0af-7922-47a1-addb-fc53e597cb50

Listed on LangChain's own careers site. Applications go to them directly.

- Employment type: full time
- Seniority: Senior
- Location: San Francisco, CA
- Salary: 175000 – 240000 USD per year

## Summary

LangChain is seeking a senior backend engineer to redesign their billing infrastructure into a flexible, self-serve platform that enables teams across the company to launch new pricing models quickly without specialized knowledge. You'll work on complex usage and token-based pricing systems, metering, and invoicing integrations for an AI platform used by major enterprises.

_Our summary, not LangChain's wording._

## Skills named

Go, Invoicing, Python, Redis

## Required

- 5+ years backend engineering experience with Python or Go
- Hands-on experience building or scaling usage-based, subscription, or consumption billing infrastructure
- Experience with metering, invoicing, or pricing-model logic
- Familiarity with Postgres, Redis, APIs, and distributed backend infrastructure
- Strong ownership mindset and ability to work in fast-paced startup environments

## Nice to have

- Experience with token-based or usage-based cost tracking from LLM or API-first companies

Apply on LangChain's site: https://jobs.ashbyhq.com/langchain/28c36c01-7eaf-4e1e-92f0-992367a5bc36/application