LiveKit is building the infrastructure layer for the voice-driven era of computing. Our platform gives developers everything they need to build, test, deploy, scale, and observe agents in production. Founded in 2021, LiveKit powers voice AI applications for OpenAI, xAI, Salesforce, Coursera, Spotify, and thousands of others, collectively facilitating billions of calls each year. ABOUT THIS ROLE: Most companies hire someone to maintain a billing system. We need someone to rebuild one — and that's a meaningfully different job. You're an engineer first. You can write the integrations, own the infrastructure, and wire up the systems — not just configure dropdowns in a UI. But you also understand that your real customers are in Finance and RevOps, and you take data accuracy as seriously as uptime. You'll thrive as a Billing Systems Engineer if you: - obsess with crafting code that is fast, reliable and practical for the problem - are known as the go-to person for tackling tough technical problems - work hard and can build and ship fast - can clearly explain complex technical concepts to others - are a fast learner, frequently picking up new languages and tools The best way to impress us... Click Apply to read the full job description.