Software Engineer Billing
Braintrust is an active AI observability platform for teams building and operating production AI agents.
Maintainer signals as of 9/25/2026
Funding history
About Braintrust
Braintrust provides tracing, evaluation, experimentation, and pattern-discovery tooling for AI agents. Teams can inspect agent traces, evaluate outputs with automated or human scoring, build datasets from production behavior, and gate releases against quality regressions.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will own the billing architecture end to end, covering usage metering, plans, subscriptions, entitlements, invoices, credits, and payments. You will design scalable systems for accurate usage measurement, plan enforcement, account state, reconciliation, and payment health. You will also build internal tools and APIs for investigating billing issues and collaborate with product, infrastructure, finance, and customer-facing teams on new pricing models and billing workflows.
Requirements
- Expert-level understanding of TypeScript, Rust, SQL, backend systems, APIs, and distributed data-processing patterns.
- Experience building and operating production usage-based billing, payments, or subscription systems.
- Experience with metering, aggregation, idempotency, reconciliation, and event-driven architectures.
- Experience integrating with Stripe or similar payment infrastructure.
- Ability to ship end to end across backend infrastructure, data systems, internal tools, and customer-facing UI.
Responsibilities
- Own the billing architecture end to end, including metering, plans, subscriptions, entitlements, invoices, credits, and payments.
- Design billing architecture that addresses immediate needs and simplifies support for new features.
- Ensure accurate measurement and billing of product usage, including processed data, evaluation scores, model usage, and data retention.
- Partner with product, infrastructure, finance, and customer-facing teams to introduce pricing models and billing workflows.
- Build reliable usage-metering and aggregation pipelines.
- Build subscription, limits, and entitlement systems supporting allowances, feature access, trials, upgrades, and on-demand usage.
- Build internal tools and APIs to investigate billing anomalies, issue credits, and explain account state.
- Provide observability across metering lag, event completeness, reconciliation discrepancies, and payment health.
Benefits
- Medical, dental, and vision insurance.
- Daily lunch, snacks, and beverages.
- Flexible time off.
- Equity.
- WiFi and cellphone stipend.