Staff Backend Software Engineer, Monetization

The Monetization Platform team owns the systems that translate what customers do on the network into the commercial relationship they have with Fastly: billing infrastructure, usage APIs, usage reporting, and orderability. Customers rely on our usage data to understand their spend, forecast costs, and make purchasing decisions. Product teams build pricing models on top of it. It’s a large responsibility, and a large opportunity to shape the financial infrastructure Fastly’s next chapter is built on.

As a Staff Software Engineer you will lead the design and development of highly-available, scalable systems as the platform expands to support new product lines, more complex pricing models, and a usage surface that keeps growing.

What You’ll Do:

• Design, ship, and own billing infrastructure, usage APIs, and backend services, from technical proposal and design docs through implementation, testing, production rollout, and on-call support.
• Use AI coding agents as part of your daily workflow.
• Take ambiguous or broadly-scoped problems and turn them into well-defined technical plans that the team can execute on.
• Partner with a diverse set of stakeholders across engineering, product, business systems, and billing to align on requirements and deliver impactful solutions.
• Develop design and architecture documents as a way of collaborating across groups in the design of new systems and APIs.
• Evolve the tools and pipelines that power billing, usage reporting, and orderability for Fastly’s growing product catalog.
• Consider stability, performance, and scalability in your designs and in the guidance you provide to the team.
• Mentor and grow other engineers on the team through code review, pairing, and technical leadership.
• Participate in an on-call rotation., * This position will require you to be available during core business hours (Pacific Time) and occasional nights and weekends as required for on call support

• Hands-on experience designing and operating highly available, reliable data pipelines and distributed systems that process large volumes of data at scale - most Staff level engineers at Fastly have at least 7 years of related experience.
• 5+ years building systems that collect, aggregate, and derive insights from large datasets. You’ve shipped a forecasting or reporting feature that real stakeholders depended on and you’ve had to explain why the numbers were wrong.
• You drive projects, not just tasks. You’ve owned a multi-week effort end-to-end: design doc through post-launch.
• You design for the people downstream of your data. The engineer whose service silently ingested bad records for a week, the customer who got an incorrect bill, the on-call engineer who had no idea what broke because there were no metrics on the pipeline. You’ve been the reason someone’s numbers were wrong, and you’ve carried that into how you build now.
• Testing and observability as subtraction, not addition. You can name a metric you added that paid off - and one you’d delete now.
• Relational and non-relational storage systems (MySQL, BigTable, BigQuery, Dynamo, Cassandra) experience.
• Pub/sub style message queues (NSQ, Kafka, Google Pub/Sub, Kinesis) experience.
• Coding agents as a daily driver, not reluctantly. This team uses them heavily.

We’ll be super impressed if you have experience in any of these:

• Experience with billing or finance systems (e.g. recurring billing engines, ratings engines, financial forecasting tools) and their data requirements.
• Expert on RESTful API design: resource modeling, versioning, idempotency, error semantics, pagination, OpenAPI. You’ve made one of these calls wrong in production and remember what it cost to clean up.

The estimated salary range for this position is $211,370 to 253,644, We care about you. Fastly works hard to create a positive environment for our employees, and we think your life outside of work is important too. We support our teams with great benefits that start on the first day of your employment with Fastly. Curious about our offerings?

We offer a comprehensive benefits package including medical, dental, and vision insurance. Family planning, mental health support along with Employee Assistance Program, Insurance (Life, Disability, and Accident), a Flexible Vacation policy and up to 18 days of accrued paid sick leave are there to help support our employees. We also offer 401(k) (including company match) and an Employee Stock Purchase Program. For 2026, we offer 11 paid local holidays, 12 paid company wellness days.

Fastly helps people stay better connected with the things they love. Fastly’s edge cloud platform enables customers to create great digital experiences quickly, securely, and reliably by processing, serving, and securing our customers’ applications as close to their end-users as possible - at the edge of the Internet. The platform is designed to take advantage of the modern internet, to be programmable, and to support agile software development. Fastly’s customers include many of the world’s most prominent companies, including GitHub, Yelp, Paramount, and JetBlue., Why Fastly?

• We have a huge impact. Fastly is a small company with a big reach. Not only do our customers have a tremendous user base, but we also support a growing number of open source projects and initiatives. Outside of code, employees are encouraged to share causes close to their heart with others so we can help lend a supportive hand.
• We value diversity. Growing and maintaining our inclusive and diverse team matters to us. We are committed to being a company where our employees feel comfortable bringing their authentic selves to work and have the ability to be successful – every day.
• We are passionate. Fastly is chock full of passionate people and we’re not ‘one size fits all’. Fastly employs authors, pilots, skiers, parents (of humans and animals), makeup geeks, coffee connoisseurs, and more. We love employees for who they are and what they are passionate about.