Senior Backend Engineer, Enterprise Billing Platform

LangChain
San Francisco
Workplace: OnsiteFull timeUSD 175,000 - 240,000 annuallyFunction: Software EngineeringExperience: 5+ yearsSkills: ["Ownership mindset","Writing maintainable code","Cross-team partnership","Thriving in ambiguity"]

Rearchitect LangChain’s billing pipeline into a flexible, self-serve enterprise monetization platform. Build usage- and token-based pricing infrastructure in Python/Go, including primitives that let teams launch pricing models quickly. Own billing reconciliation and metering accuracy with audit logging and tracking, integrate with billing/payment providers, and partner with product and engineering to define the roadmap for pricing fast, flexible, and correct at scale.

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FursaFursa
LangChain
LangChain
1 day ago

Senior Backend Engineer, Enterprise Billing Platform

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Last checked: 3 hours agoStatus: Live

Job Summary

Rearchitect LangChain’s billing pipeline into a flexible, self-serve enterprise monetization platform. Build usage- and token-based pricing infrastructure in Python/Go, including primitives that let teams launch pricing models quickly. Own billing reconciliation and metering accuracy with audit logging and tracking, integrate with billing/payment providers, and partner with product and engineering to define the roadmap for pricing fast, flexible, and correct at scale.
Location: San Francisco
Workplace: Onsite
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Rearchitect LangChain’s billing pipeline into a self-serve platform with reusable primitives and components for launching new pricing models.
  • •Design and implement usage-based and token-based pricing infrastructure, including complex and configurable pricing logic.
  • •Build backend systems that enable teams to describe a pricing model and go live in days instead of weeks.
  • •Implement audit logging, usage tracking, and metering pipelines to ensure billing correctness as pricing complexity increases.
  • •Own billing reconciliation, deduplication, and edge cases such as proration, disputes, and credits to ensure accurate invoicing at scale.

Pay and Benefits

Salary: USD 175,000 - 240,000 annually
Equity and Bonus:Equity
Perks:Health InsuranceDentalVision401kPaid LeaveMeal Allowance

Key Requirements

  • •5+ years of backend engineering experience with Python or Go (both preferred).
  • •Hands-on experience building or scaling usage-based, subscription, or consumption billing infrastructure.
  • •Experience with metering, invoicing, or pricing-model logic, including work enabling other teams to configure or launch pricing changes.
  • •Familiarity with Postgres, Redis, APIs, and modern distributed backend infrastructure.
  • •Strong ownership mindset and ability to thrive in fast-paced, unstructured environments.
Experience:5+ yearsUsage-based billingSubscription billingConsumption billingDistributed systemsLLM/API-first companies
Skills:Ownership mindsetWriting maintainable codeCross-team partnershipThriving in ambiguity
Tech Stack:PythonGoPostgresRedisAPIsMetronomeOrbStripe

Company Brief

LangChain
Provides an open-source framework and commercial platform (LangSmith/LangGraph) for building, testing, monitoring, and deploying LLM-powered applications and agentic AI for developers and enterprises.
Industry: Developer Tools
Company Size: Medium (51 to 250 employees)
Revenue: USD 10M to 25M
Growth: Scaleup
Valuation: Unicorn (USD 1B+)
Funding: Series B
Headquarters: San Francisco, United States
Founded: 2022
WebsiteLinkedIn