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Staff Software Engineer, Backend (Card)

Affirm· Consumer Engineering
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RemotePLN 365k - PLN 485kFull-timePosted 2mo ago

About the role

Lead backend engineer for EU card-related systems, shaping technical strategy across EU teams, and owning architecture, reliability, and collaboration with product, design, and analytics to deliver scalable card and payments infrastructure.

Responsibilities

  • Set technical strategy for the team on a year-long horizon and align with critical, business-impacting projects.
  • Be the lead software engineer for all cards in the EU.
  • Collaborate across product management, design & analytics to ensure technical sustainability, risks and trade-offs are well understood and managed.
  • Act as a force-multiplier by defining and advocating technical solutions and operational processes.
  • Own the team’s operations and availability with proper monitoring, triage rotations, playbooks, policies, testing, and alerting for on-call readiness.
  • Foster a culture of quality and ownership by setting code review and design standards and evangelizing them beyond the team.
  • Develop talent by providing feedback, guidance, and leading by example.

Qualifications

  • 8+ years of experience as a software engineer.
  • Proficient in designing, developing and launching backend systems at scale with technologies like Python, Kotlin, AWS, MySQL, and Kubernetes.
  • Proficient in developing frontend applications.
  • Experience delivering major features or components with a clear technical and execution plan; writes high-quality code.
  • Comfortable working across levels from low-level language idioms to large system architecture.
  • Track record of gathering and iterating on feedback from engineers and cross-functional peers to grow and impact.
  • Strong verbal and written communication skills for collaboration with a global engineering team.

Skills

Required:Backend design and architectureLanguages and platformsFrontend developmentCollaboration and communication

Benefits

  • Base pay in the range of 365,000 zł – 485,000 zł per year.
  • Equity rewards from the parent company, annual refresh, and potential for growth in equity.
  • Monthly stipends for health, wellness, and tech spending; 100% subsidized medical coverage, dental and vision for employee and dependents.
  • Eligibility for annual equity from the parent company; ongoing growth opportunities.
  • Flexible spending wallets up to 1390 zł per month.
  • Comprehensive benefits including private healthcare (Lux Med Platinum), MultiSport card, learning and development programs, family healthcare support, parental leave support, mental well-being support (Lyra), financial well-being support (Northstar), financial planning tools, ERGs, and eligibility for creative tax benefits.
Last updated Sep 16, 2026. Interested? Apply on the company site.

About Affirm

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