Software Engineer II, Fullstack (Ads Platform)

Remote US · Remote · 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 deploy budgets and reach targeted consumers.
This role involves collaborating with product management, design, and analytics teams to deliver personalized shopping experiences and scalable technical solutions.

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.
Support 'keep the lights on' and on-call efforts.
Participate in the interview process to contribute to team growth and community.

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.
Comfort navigating large code bases, debugging others' code, and providing feedback through code reviews.
Strong verbal and written communication skills.
Bachelor’s degree in a related field or equivalent practical experience.