Staff Backend Engineer - Phone Billing

We're looking for a Staff Engineer to lead the technical direction and evolution of Phone Billing, one of the most critical components of HighLevel's communication platform. Phone Billing sits at the intersection of product usage, infrastructure, and revenue — it is responsible for accurately metering and monetising usage across LC Phone products, including voice, messages, phone numbers, and other communication services.

The scale and criticality of this system make billing correctness non-negotiable. Every communication event can have a financial implication, and a single billing error can impact revenue, customer trust, and financial reconciliation at the same time. The platform processes 100M+ events daily across 15+ services, with billing workflows that need to remain accurate and reliable despite retries, duplicate events, delayed events, provider inconsistencies, partial failures, and continuously evolving pricing models.

As a Staff Engineer, you'll own the architecture, scalability, reliability, and technical strategy of the Phone Billing platform. You'll solve complex distributed-systems problems around usage metering, rating, charging, idempotency, reconciliation, credits, refunds, adjustments, provider cost tracking, and billing lifecycle management. You'll also drive the architectural evolution required to support significantly higher volumes without compromising financial accuracy or system performance.

A key part of the role will be building billing systems that are correct by design — ensuring that every billable event is accounted for exactly once from a business perspective, even when the underlying infrastructure operates with retries, at-least-once delivery, asynchronous processing, and failures. You'll establish robust reconciliation mechanisms between HighLevel's internal usage data, provider-level usage, and customer invoices, with strong observability and auditability to quickly identify and resolve discrepancies.

You'll work closely with Engineering Managers, Product Managers, Finance, and other Staff Engineers to define pricing and billing architecture, while partnering across Phone, WhatsApp, CPaaS, and provider-integration teams. You'll influence technical decisions beyond a single team, establish engineering standards, identify systemic technical debt, and drive long-term improvements in reliability, cost efficiency, data architecture, and operational excellence.

The broader Phone Core ecosystem includes CPaaS platform services, Trust & Compliance, and phone number provisioning, giving this role significant architectural influence across the communication platform. Your primary focus, however, will be making Phone Billing a highly scalable, financially accurate, resilient, observable, and extensible platform capable of supporting the next 10x growth of HighLevel's communication business.