Senior Backend Engineer, Billing & Monetization

LiveKit

About The Position

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 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 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.

Requirements

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 auditability
You think in systems and edge cases, anticipating race conditions, retries, proration scenarios, and failure modes before they impact customers
You are comfortable working with finance, support, and product stakeholders, translating complex technical behavior into clear outcomes
You have experience with relational data modeling and transactional integrity, and understand idempotency, reconciliation, and audit trails
You value observability and operational excellence, building systems that are diagnosable, monitorable, and resilient
You enjoy reducing manual toil through automation and improving internal workflows
You are motivated by building infrastructure that directly impacts revenue, customer trust, and business growth

Responsibilities

Evolve our billing & monetization platform by ensuring accurate invoicing, reliable revenue capture, and a seamless customer billing experience
Design and build systems for plans, pricing, usage, discounts, credits, and refunds that support flexible packaging and rapid GTM experimentation
Improve financial correctness and auditability by strengthening reconciliation, idempotency, traceability, and error recovery across billing workflows
Enhance observability and reliability by ensuring monitoring, alerting, and diagnostics that detect revenue-impacting issues before customers do
Reduce support toil by building internal tools and automation that make adjustments, credits, and investigations fast and self-service
Partner 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 growth
Document and operationalize billing workflows with runbooks and best practices to improve team confidence and response speed