Senior Fintech Software Engineer - Billing Systems

CloudFlare; United States; Hybrid; USD 180,000 - 240,000; Full time

Job summary

Cloudflare’s Billing Engineering team builds and operates the systems responsible for usage metering, aggregation, subscriptions, invoicing, payments, and revenue recognition. These systems power billions in revenue and support millions of customers across Cloudflare’s product portfolio.

We are rebuilding key parts of our billing platform to scale with products including AI, Zero Trust, Workers, Bot Management, and DDoS Protection.

Qualifications

• Five or more years of professional software engineering experience.
• Experience building and operating distributed systems or backend services in production.
• Proficiency in Go or another modern programming language.
• Strong understanding of RESTful APIs and API standards (OpenAPI, OAuth, JWT).
• Working knowledge of SQL and relational databases (PostgreSQL/MySQL).
• Experience designing secure, highly available microservices in Unix environments.
• Familiarity with event-driven architectures and asynchronous processing.

Responsibilities

• Build Billing Systems: Design, develop, and operate microservices for metering, subscriptions, invoicing, payments, and financial workflows.
• Own Projects End to End: Drive initiatives from requirements through production.
• Ensure Accuracy and Reliability: Build fault-tolerant systems with safe retries and high transaction volumes.
• Maintain Operational Excellence: Monitor services, improve observability, investigate billing issues.
• Shape Technical Direction: Participate in architecture reviews and improve engineering standards.
• Collaborate Cross-Functionally: Work with Product, Finance, Accounting, Support, and other teams.

Skills

Go

REST APIs

SQL

Distributed systems

OpenAPI/JWT

Education

Bachelor's degree in CS

Tools

PostgreSQL

Redis

Kafka

Kubernetes

Docker

Temporal

Job description

Cloudflare’s Billing Engineering team builds and operates the systems responsible for usage metering, aggregation, subscriptions, invoicing, payments, and revenue recognition. These systems power billions in revenue and support millions of customers across Cloudflare’s product portfolio.

We are rebuilding key parts of our billing platform to scale with products including AI, Zero Trust, Workers, Bot Management, and DDoS Protection.