Software Engineer, Billing

The role

You will evolve the systems that power how Cursor charges and reconciles revenue across millions of developers and enterprise teams. You will work across the billing stack, usage metering pipelines, subscription and entitlement systems, payment integrations, and the ledger layer.

What you will do

• Implement usage and billing systems changes end-to-end
• Evolve the ledger system that serves as the source of truth for customer balances, credits, overages, and adjustments
• Integrate deeply with Stripe including subscriptions, usage records, invoices, webhooks, and edge cases
• Build billing APIs and internal tooling for product, finance, and customer success teams
• Improve observability across the billing pipeline, metering lag, reconciliation discrepancies, and invoice accuracy
• Partner with product, infrastructure, and finance teams to ship new pricing models

Required qualifications

• Experience shipping a usage-based billing system in production or working on billing systems in general
• Must be able to work in person at the San Francisco or New York office

Nice to have

• Opinions on metering architecture, idempotency, and exactly-once semantics
• Experience shipping a usage-based billing system in production and opinions on metering architecture, idempotency, and exactly-once semantics
• Experience integrating deeply with Stripe, understanding its data model, and dealing with erroring webhooks
• Experience building or maintaining a financial ledger and understanding why it's required
• Care about correctness and making sure customers don't have to manually review their invoices
• Able to hold the tension between "move fast" and "do not lose revenue or trust."
• Feel comfortable shipping features end-to-end, from scaling up infrastructure to tweaking a UI component

Benefits

• Equity
• Comprehensive medical, vision, and dental coverage
• Access to a 401(k) retirement plan
• Short & long-term disability insurance
• Life insurance
• Various other discounts and perks

About the company

SpaceXSI is building Super Intelligence to help humanity understand the universe. Their teams are building the full Super Intelligence stack, from Colossus supercomputers to Grok models and applications.