Senior Backend Engineer, Billing & Monetization

LiveKit is revolutionizing the AI landscape by providing the essential network infrastructure that powers multimodal AI interfaces, enabling seamless audio and visual interactions. Founded in 2021, LiveKit has rapidly grown to support over 3 Billion calls annually, 100,000+ developers globally, and industry giants like OpenAI, Character AI, Spotify, and Meta.You'll thrive at LiveKit if you:obsess with crafting code that is fast, reliable and practical for the problemare known as the go-to person for tackling tough technical problemswork hard and can build and ship fastcan clearly explain complex technical concepts to othersare a fast learner, frequently picking up new languages and toolsThe best way to impress us is with thoughtful Issues and/or PRs on our Github repos 😊About This Role: We're looking for a talented engineer to own and evolve the billing systems that power LiveKit's rapid growth. As our platform scales to support billions of metered transactions for our customers across the globe, our invoicing and billing infrastructure needs more dedicated engineering ownership. This is a rare opportunity to join at exactly the right moment, when your work will have outsized impact on customer experience and business velocity. You'll collaborate closely with Finance, Support, GTM, and Product teams, giving you visibility and influence across the organization. Working alongside world-class frontend and backend engineers using modern technologies, you'll build systems that are both technically elegant and commercially essential. If you're excited about building financially critical infrastructure that directly enables a fast-growing company to scale, this role offers the perfect blend of technical challenge and business impact.What You'll Do: Evolve our billing & monetization platform by ensuring accurate invoicing, reliable revenue capture, and a seamless customer billing experienceDesign and build systems for plans, pricing, usage, discounts, credits, and refunds that support flexible packaging and rapid GTM experimentationImprove financial correctness and auditability by strengthening reconciliation, idempotency, traceability, and error recovery across billing workflowsEnhance observability and reliability by ensuring monitoring, alerting, and diagnostics that detect revenue-impacting issues before customers doReduce support toil by building internal tools and automation that make adjustments, credits, and investigations fast and self-servicePartner with Finance, Support, GTM and Product to enable pricing agility and future scale by evolving architecture to support new pricing models, usage-based billing, and international growthDocument and operationalize billing workflows with runbooks and best practices to improve team confidence and response speedWho You Are: You have strong backend engineering experience designing reliable, scalable services and APIs (Go, gRPC, PostgreSQL, Kubernetes, Stripe)You’ve worked on billing, payments, subscriptions, or other financially critical systems, and understand the importance of accuracy and auditabilityYou think in systems and edge cases, anticipating race conditions, retries, proration scenarios, and failure modes before they impact customersYou are comfortable working with finance, support, and product stakeholders, translating complex technical behavior into clear outcomesYou have experience with relational data modeling and transactional integrity, and understand idempotency, reconciliation, and audit trailsYou value observability and operational excellence, building systems that are diagnosable, monitorable, and resilientYou enjoy reducing manual toil through automation and improving internal workflowsYou are motivated by building infrastructure that directly impacts revenue, customer trust, and business growthWe offerAn opportunity to build something truly impactful to the worldContribute to open source alongside world-class engineersCompetitive salary and equity packageHealth, ... (truncated, view full listing at source)