Senior Backend Cost Engineer - Cloud & AI FinOps

Affirm; London; On-site; CAD 181,000 - 241,000; Full time

Job summary

Affirm is reinventing credit to offer a transparent pay-later option with no hidden fees. The Staff Cost Engineer will shape cost governance across multi-cloud and AI vendor footprints, building self-service tooling and dashboards to explain spend and anomalies.

The role blends finance, infrastructure, and data engineering, influencing cost strategy and driving durable systems. Remote Canada-based, with equity and total compensation components.

Qualifications

• 8+ years of experience designing, developing and launching backend systems at scale.
• Experience with AWS, MySQL, Spark and Kubernetes for highly available distributed systems.
• Experience with FinOps or cost-visibility platforms and building dashboards or savings reporting.

Responsibilities

• Set technical strategy for your team on a year-long timescale.
• Collaborate across product, design, and analytics to ensure sustainability and risk management.
• Define and advocate technical solutions and operational processes for the team.

Skills

Backend systems design

Python or Kotlin

Distributed systems

FinOps / cost visibility

Automation tooling

SQL & cost data modeling

Communication skills

Tools

AWS

MySQL

Spark

Kubernetes

Terraform

Snowflake

Job description

Affirm is reinventing credit to offer a transparent pay-later option with no hidden fees. The Staff Cost Engineer will shape cost governance across multi-cloud and AI vendor footprints, building self-service tooling and dashboards to explain spend and anomalies.

The role blends finance, infrastructure, and data engineering, influencing cost strategy and driving durable systems. Remote Canada-based, with equity and total compensation components.