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Staff Software Engineer, Back-end

Spain 101000.00 - 131000.00 EUR / Year · Job Posted December 15, 2025
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Job Description

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. Identity International is a newly established team created to accelerate Affirm’s international expansion - one of the company’s top priorities. Our vision is to become a trusted, self-sufficient team that drives customer identity capabilities end-to-end across international markets. The team’s scope includes building and expanding Identity Data Management, Verification, and Decisioning capabilities for Europe, evaluating and integrating third-party KYC vendors, and ensuring alignment with global platform and operational standards. We operate at the intersection of technical depth, regulatory complexity, and cross-geo collaboration, making this an exciting opportunity for engineers who want to shape one of Affirm’s foundational processes. By joining the team, you will directly influence how Affirm operates Identity in international markets - a challenge that is critical for both business growth and customer trust.

Job Responsibility

  • Set technical strategy for your team on a year-long time scale, and help your team tie it together with critical, business-impacting projects
  • Collaborate across teams in the product development lifecycle by collaborating with product management, design & analytics to ensure technical sustainability, risks and trade-offs are well understood and managed
  • Act as a force-multiplier for your team through your definition and advocacy of technical solutions and operational processes
  • Take ownership of your team’s operations and availability by ensuring you have the right monitoring, triage rotations, playbooks, polcities, testing and alerting in place to support “keep the lights on” & on-call efforts
  • Foster a culture of quality and ownership on your team by setting code review and design standards for your team, and advocating for them beyond your team through your writing and tech talks
  • Help develop talent on your team by providing feedback and guidance, and leading by example

Requirements

  • 8+ years of experience designing, developing and launching backend systems at scale using languages like Python or Kotlin
  • Extensive track record of developing highly available distributed systems using technologies like AWS, MySQL, Spark and Kubernetes
  • Strong verbal and written communication skills that support effective collaboration with our global engineering team
  • Experience delivering major features, system components or deprecating existing functionality in a system through the definition of a technical and execution plan
  • Write high quality code that is easily understood and used by others
  • On-Call Rotation

What we offer

  • Flexible Spending Wallets for tech, food and lifestyle
  • Away Days - wellness days to take off work and recharge
  • Learning & Development programs
  • Parental benefit
  • Employee Resource & Community Groups
  • Health care coverage - Affirm covers all premiums for all levels of coverage for you and your dependents
  • Flexible Spending Wallets - generous stipends for spending on Technology, Food, various Lifestyle needs, and family forming expenses
  • Time off - competitive vacation and holiday schedules allowing you to take time off to rest and recharge
  • ESPP - An employee stock purchase plan enabling you to buy shares of Affirm at a discount
  • Visa sponsorship

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