Backend Engineer • Senior

Who you are

You have 5+ years of backend engineering experience, particularly in designing and implementing scalable systems that handle complex transactions and fraud detection. You are comfortable navigating ambiguity and leading teams through open-ended problems, ensuring that everyone is supported throughout the delivery process.

Your expertise lies in backend technologies, specifically Python and Kotlin, and you have a solid understanding of REST APIs and microservices architecture. You are adept at collaborating with cross-functional teams, including product, compliance, and machine learning, to deliver high-quality software solutions.

You possess strong problem-solving skills and are able to evaluate risk at critical decision points in the user journey. Your experience includes adapting to evolving fraud patterns and equipping operations teams with the necessary tools to investigate and mitigate fraud effectively.

You are a proactive communicator who can articulate technical concepts to non-technical stakeholders, fostering collaboration across teams. You are committed to elevating quality standards and evolving engineering processes within your team.

Desirable

Experience with event-driven architecture and familiarity with fraud detection systems would be advantageous. You are open to learning new technologies and methodologies that can enhance your team's performance and the overall product quality.

What you'll do

In this role, you will own and deliver quarterly goals for your team, leading engineers through ambiguity to solve complex problems. You will design and implement backend services and APIs using Python or Kotlin, operating within Affirm’s microservice and event-driven architecture.

You will take an active role in shaping the team’s roadmap, collaborating on technical design, and driving execution across projects that span multiple teams. Your responsibilities will include ensuring that the software you develop is robust, scalable, and secure, while also mentoring junior engineers and fostering a culture of continuous improvement.

You will partner closely with the Engineering Manager and your teammates to elevate quality standards and evolve engineering processes. Your work will directly contribute to Affirm's mission of making credit more honest and friendly, while protecting both buyers and merchants from fraud.

What we offer

Affirm offers a fully remote work environment, allowing you to collaborate with a diverse team across Europe and North America. You will have the opportunity to work on impactful projects that shape the future of credit and fraud prevention.

We encourage you to apply even if your experience doesn't match every requirement. At Affirm, we value diverse perspectives and are committed to creating an inclusive environment where everyone can thrive.