Senior Software Engineer, Backend (Identity International)

Affirm's Identity team owns identity for all markets outside North America, playing a key role in Affirm's international expansion. The team is responsible for KYC, user lifecycle management, and identity decisioning across multiple regulatory environments. As a Senior Software Engineer, you will help shape quarterly technical direction, translate team goals into concrete projects, and identify cross-cutting risks and opportunities. You will take ownership beyond shipping code, raising code quality and review standards, making performance and scale tradeoffs explicit, and improving operational health. You will mentor engineers, support new hires and interns, and contribute to high-signal hiring. This is a hands-on coding role where you will spend most of your week in the codebase, leveraging AI tools to write robust Kotlin and Python, ship impactful features, investigate production issues, and keep systems reliable.

• Own and deliver quarterly goals for your team, leading engineers through ambiguity to solve open-ended problems.
• Collaborate with product management, design, and analytics in the product development lifecycle.
• Proactively identify project, process, technology, or business issues and lead in solving them.
• Support operations and availability of your team's artifacts by creating and monitoring metrics, escalating when needed, and supporting on-call efforts.
• Foster a culture of quality and ownership by setting or improving code review and design standards.
• Help develop talent by providing feedback and guidance.

• 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 elegant, simple, and extensible design.
• Proficient at making significant changes in a large code base with a suite of tools and practices for safe changes.
• Strong verbal and written communication skills for collaboration with a global engineering team.

Base pay grade N: 308,000 zł - 428,000 zł. Employees new to Affirm typically come in at the start of the range. Total compensation may include monthly stipends for health, wellness, and tech spending, and benefits including 100% subsidized medical coverage, dental, and vision for you and your dependents. Employees may be eligible for equity rewards from Affirm Holdings, Inc. (parent company). 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 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.