Software Engineer II, Fullstack (Ads Platform)

Remote · Remote US · USD 133,000-183,000 / year · 5+ years experience · Remote · Posted Oct 9, 2026

At a glance

The Software Engineer II, Fullstack (Ads Platform) will contribute to the development of Affirm's Ads Platform, which enables merchant partners to reach targeted consumers. This role involves collaborating with product management, design, and analytics teams to deliver scalable web applications and APIs.

Break down larger projects into individual tasks and deliver them in multiple phases.
Collaborate with product management, design, and analytics teams throughout the product development lifecycle.
Articulate technical constraints and partner on decisions considering risks and trade-offs.
Support operations and availability of team artifacts by creating and monitoring metrics.
Escalate issues when needed and support 'keep the lights on' and on-call efforts.
Contribute to team community by participating in growth and development activities.
Participate in the interview process.

1.5+ years of experience as a software engineer.
Experience shipping web apps using declarative UI frameworks like React.
Experience designing, developing, and launching APIs at scale using Python or Kotlin.
Ability to take a simple problem or business scenario into a solution interacting with multiple software components.
Experience writing clear, well-tested, and extensible code.
Comfortable navigating large code bases and debugging others' code.
Experience providing feedback through code reviews.
Strong verbal and written communication skills.
Bachelor’s degree in a related field or equivalent practical experience.