Software Engineer I, Full Stack (Consumer Engineering)

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest.

Affirm is seeking a Full Stack Software Engineer to join the Card Acquisition team within the Consumer org. This role is for an engineer who will contribute to the quality and velocity of full stack development across mobile, web, and backend systems. The team plays a critical role in shaping the first experience customers have with Affirm—building trust, clarity, and value from the very first interaction. As a Software Engineer, you will be responsible for implementing features, participating in technical discussions, and growing your technical depth. You'll work at the intersection of product, design, and engineering to build polished, performant, and accessible user experiences that directly impact conversion, retention, and business growth.

What You'll Do

With the support of your team, you will work on tasks that contribute to the team's projects and goals.

You will work collaboratively and proactively with your team and stakeholders, bringing them along for your work and helping to create visibility and dialog regarding the risks and trade-offs related to your work.

You will strike the right balance of speed and quality in your work, ensuring that we hit our business goals while protecting our systems from downtime.

You will contribute to a sense of community on your team by engaging in growth and development activities.

What We Look For

You have previous work or internship experience designing, developing and launching backend systems at scale and are experienced using one of Python or Kotlin.

You are familiar with the building blocks of distributed systems, and the technologies like AWS, MySQL and Kubernetes.

You have knowledge of modern front-end tech stack (we use Javascript, Typescript, React/React Native/Redux, ES6, Webpack, and CSS3)

You have mastered taking a simple proble