Sr/Staff Software Engineer - Payments

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.

• →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.

• 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.

• 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.

• We are currently hiring in downtown San Francisco.