Billing Systems Engineer – End-to-End, Flexible Time Off

Braintrust; New York (NY); On-site; USD 180,000 - 240,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Daily lunch, snacks, and beverages

Flexible time off

Competitive salary and equity

Wifi & cellphone stipend

Job summary

Braintrust is seeking a Software Engineer, Billing to build systems that make pricing, usage, and payments accurate, scalable, and transparent. You will own end-to-end billing architecture, metering, subscriptions, invoices, credits, and payments, and partner with product, infra, finance, and customer teams to enable new pricing models.

This is a deeply technical IC role focused on billing correctness and scale as AI workloads grow.

Qualifications

• 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
• Experience building or maintaining financial ledgers, credits, balances, or invoice systems is a plus
• Comfortable shipping end-to-end, from backend infrastructure and data systems to internal tools and customer-facing UI
• Previous startup experience is a plus
• Appreciation for the tension between moving quickly and preserving customer trust and billing correctness

Responsibilities

• Own Braintrust billing architecture end-to-end, including metering, plans, subscriptions, entitlements, invoices, credits and payments
• Design our billing architecture to solve immediate needs and simplify billing for new features as they are developed and released
• Ensure Braintrust accurately measures and bills for product usage, including processed data, evaluation scores, model usage, and data retention
• Partner with product, infrastructure, finance, and customer-facing teams to introduce new pricing models and billing workflows with confidence
• Build the systems that power Braintrust billing, such as a reliable usage-metering and aggregation pipeline
• Develop a subscription, limits, and entitlement system that supports plan allowances, feature access, trials, upgrades, and on-demand usage
• Create internal tools and APIs for investigating billing anomalies, issuing credits, and helping customers understand their account state
• Maintain observability across the billing pipeline, including metering lag, event completeness, reconciliation discrepancies, and payment health

Skills

TypeScript

Rust

SQL

backend systems

APIs

distributed data-processing

billing - payments

metering

reconciliation

Stripe integration

financial ledgers

end-to-end shipping

Tools

Stripe

Job description

Braintrust is seeking a Software Engineer, Billing to build systems that make pricing, usage, and payments accurate, scalable, and transparent. You will own end-to-end billing architecture, metering, subscriptions, invoices, credits, and payments, and partner with product, infra, finance, and customer teams to enable new pricing models.

This is a deeply technical IC role focused on billing correctness and scale as AI workloads grow.