Software Engineer - Billing

fal•San Francisco, CA

34d•$160,000 - $200,000•Onsite

About The Position

We are looking for a Software Engineer to help build the next generation of usage-based billing systems at fal. This role is ideal for someone passionate about designing scalable event-driven systems that integrate tightly with Stripe and Orb, power real-time usage tracking, and deliver accurate, flexible billing experiences for customers. You will work cross-functionally with Product, Finance, and Infrastructure teams to ensure our billing system is robust, accurate, and capable of supporting new pricing models as our product grows.

Requirements

Experience with usage-based billing systems or event-driven architectures.
Strong Python skills for backend microservices.
Familiarity with Stripe (payments, invoicing) and Orb (usage metering) APIs.
Experience with Postgres for transactional data and BigQuery for analytics.
Experience with Kubernetes and containerized deployments.
Ability to build admin interfaces or customer dashboards using Next.js.
Comfort working with event-driven data pipelines (e.g., Kafka, Pub/Sub, or similar).
Strong cross-functional collaboration skills with Finance, Product, and Data teams.

Nice To Haves

Experience with FinTech, SaaS, or cloud usage billing at scale.
Familiarity with cloud providers (AWS, GCP) and their billing models.
Knowledge of pricing experimentation or monetization platforms.

Responsibilities

Design and build event-driven billing systems that process real-time usage data.
Integrate with Orb for usage metering and Stripe for payments and invoicing.
Build Python-based microservices running on Kubernetes to handle billing workflows.
Develop data storage and processing flows for downstream analysis in BigQuery.
Collaborate with product engineers to build Next.js dashboards and admin tools for billing insights and reconciliation.
Ensure billing systems are accurate, auditable, and scalable to support new product launches and pricing models.
Partner with Finance to automate reporting, reconciliation, and revenue analytics.