Senior Backend Engineer, Enterprise Billing PlatformNew$175K–$240K

The opportunity

Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.

What you'll do

  • Rearchitect LangChain's billing pipeline into a self-serve platform, building: the primitives and components other engineering teams use to launch new pricing models without needing enterprise team review

  • Design and implement usage-based and token-based pricing infrastructure: (Python/Go), including complex, configurable pricing logic beyond simple per-unit charging

  • Build the underlying system that will eventually power an internal agent and: skills interface, letting teams describe a pricing model and go live in days instead of weeks

  • Reduce the code and complexity required to ship a new pricing SKU through: better abstractions and shared components

  • Implement audit logging, usage tracking, and metering pipelines tied to: billing accuracy, with a focus on correctness as pricing complexity increases

  • Integrate with billing and payment platforms (e.g. Metronome, Orb, or Stripe): to support metering and invoicing

What they're looking for

  • Own billing reconciliation, deduplication, and edge cases like proration,: disputes, and credits to ensure invoicing accuracy at scale
  • Partner with the billing PM and enterprise engineering to define and: prioritize the pricing infrastructure roadmap
  • Write clean, maintainable, and well-documented backend code
  • Technical experience 5+ years of backend engineering experience with Python or Go (both preferred)