Senior Software Engineer, Backend (Card Acquisition)

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without hidden fees or compounding interest. We are seeking a Senior Software Engineer to join the Card Acquisition team within the Consumer org. This team shapes the first experience customers have with Affirm, building trust, clarity, and value from the very first interaction.

As a Senior Engineer, you will define long-term technical strategy, mentor senior engineers, and act as a force multiplier through technical depth, operational excellence, and ability to navigate ambiguity. You'll work at the intersection of product, design, and engineering to build polished, performant, and accessible user experiences that impact conversion, retention, and business growth.

• Own and deliver quarterly goals for your team, leading engineers through ambiguity to solve open-ended problems.
• Support peers and stakeholders in the product development lifecycle by collaborating with product management, design, and analytics.
• Proactively identify project, process, technology, or business issues, advocate for them, and lead in solving them.
• Take ownership of your team's operations and availability, ensuring proper monitoring, triage rotations, playbooks, policies, testing, and alerting for on-call efforts.
• Foster a culture of quality and ownership by setting or improving code review and design standards, and advocating beyond your team through writing and tech talks.
• Help develop talent on your team by providing feedback and guidance, and leading by example.
• Participate in an on-call rotation as a requirement.

• 4+ years of experience designing, developing, and launching backend systems at scale using languages like Python or Kotlin.
• Track record of developing highly available distributed systems using technologies like AWS, MySQL, and Kubernetes.
• Experience defining a technical plan for delivery of a significant feature or system component with an elegant, simple, and extensible design.
• High-quality code that is easily understood and used by others.
• Proficiency in making significant changes in a large code base, with tools and practices for safe delivery.
• Ownership of growth, proactively seeking feedback from team, manager, and stakeholders.
• Strong verbal and written communication skills for collaboration with a global engineering team.
• Equivalent practical experience or a Bachelor's degree in a related field.

Base pay grade N: 308,000 zł - 428,000 zł. All employees in this role are eligible to receive equity from the parent company each year. Equity grade 4: new hire equity $32,000-$48,000, annual refresh $10,000, reward equity $0-$150,000. Flexible spending wallets for technology and wellbeing needs, reimbursable up to 1,390 zł per month.

• Competitive paid time off, paid public holidays, and additional paid Away Days.
• Comprehensive private healthcare through Lux Med's Platinum package.
• MultiSport card for health and well-being.
• Learning and development programs.
• Family healthcare support through Maven and parental leave support through Parentaly.
• Mental well-being support through Lyra, including up to 12 confidential counseling or coaching sessions each year.
• Financial well-being support through Northstar.
• Employee Resource Groups (ERGs).
• Eligibility for creative tax benefits.

Remote Poland. The majority of roles can be located anywhere in Poland. Affirm is a remote-first company.