Senior Software Engineer, Backend (Card Acquisition)

Affirm is a financial technology company that provides a clear, predictable way to pay over time, with no hidden fees or surprises. The company uses advanced technology and analytics to serve a broader population than traditional lenders.

Affirm is seeking a Senior Software Engineer to join the Card Acquisition team within the Consumer org. The team shapes the first experience customers have with Affirm, building trust, clarity, and value from the 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 will 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 by ensuring monitoring, triage rotations, playbooks, policies, testing, and alerting are in place 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 changes.
• 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. Eligible for equity from the parent company (Equity Grade 4, new hire equity $32,000-$48,000, annual refresh $10,000). Flexible spending wallets for technology and wellbeing needs, reimbursable up to 1390 zł per month. Benefits include competitive paid time off, paid public holidays, additional paid Away Days, private healthcare through Lux Med Platinum, MultiSport card, learning and development programs, family healthcare support through Maven, parental leave support through Parentaly, mental well-being support through Lyra, financial well-being support through Northstar, Employee Resource Groups, and eligibility for creative tax benefits.

Remote Poland. The majority of roles can be located anywhere in Poland.

Apply via the Greenhouse job posting.