Senior Software Engineer, Back-end (Fraud)

Affirm
Spain
Workplace: RemoteFull timeEUR 86,000 - 122,000 annuallyFunction: Software EngineeringExperience: 5+ yearsSkills: ["Communication","Ownership","Mentorship","Learning mindset","Quality focus"]

Build and evolve real-time fraud decisioning services and APIs, extending a fraud decisioning system into markets beyond the US. Own quarterly goals for an engineering team, lead through ambiguity, and help scale fraud protection internationally. Integrate region-specific risk vendors, operationalize ML/AI signals, and support production availability through metrics, escalation, and on-call rotation. Partner across Product, Compliance, ML, Analytics, and Fraud Strategy.

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FursaFursa
Affirm
Affirm
1 month ago

Senior Software Engineer, Back-end (Fraud)

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 17 hours agoStatus: Live

Job Summary

Build and evolve real-time fraud decisioning services and APIs, extending a fraud decisioning system into markets beyond the US. Own quarterly goals for an engineering team, lead through ambiguity, and help scale fraud protection internationally. Integrate region-specific risk vendors, operationalize ML/AI signals, and support production availability through metrics, escalation, and on-call rotation. Partner across Product, Compliance, ML, Analytics, and Fraud Strategy.
Location: Spain
Workplace: Remote
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Own and deliver quarterly goals for your team, leading engineers through ambiguity and ensuring support throughout delivery.
  • •Design and implement real-time fraud decisioning services and APIs in Python or Kotlin to extend the system to new markets.
  • •Build and evolve platform tooling that enables launching fraud decisioning in a new country quickly and repeatably.
  • •Integrate region-specific fraud and risk vendors and operationalize ML/AI signals powering real-time decisioning.
  • •Support operations and availability by creating/monitoring metrics, escalating when needed, and contributing to on-call efforts.

Pay and Benefits

Salary: EUR 86,000 - 122,000 annually
Equity and Bonus:Equity
Perks:Health InsuranceDentalVisionLearning BudgetParental LeaveEquityRemote WorkTech Spending

Key Requirements

  • •5+ years building backend systems at scale using Python or Kotlin.
  • •Experience with distributed systems and infrastructure using AWS, MySQL/PostgreSQL, and Kubernetes.
  • •Strong system design skills and a track record of delivering maintainable, extensible services.
  • •Proficiency in SQL and working with data-rich environments.
  • •Experience with CI/CD practices and safe production deployments.
Experience:5+ yearsFintechFraudFraud preventionReal-time decisioning
Skills:CommunicationOwnershipMentorshipLearning mindsetQuality focus
Tech Stack:PythonKotlinAWSMySQLPostgreSQLKubernetesSQLCI/CDClaude CodeAISnowflakeDbtAirflowChronosphere

Eligibility

Work Authorization:Sponsorship available.

Company Brief

Affirm
Provides point-of-sale lending and buy-now-pay-later (BNPL) solutions for consumers and merchants, enabling installment payments, consumer financing, and embedded financial services through APIs and partnerships with retailers and platforms.
Industry: Lending
Company Size: Enterprise (1,001+ employees)
Revenue: USD 1B+
Growth: Public Company
Valuation: Public Company (Market Cap in USD)
Funding: IPO / Publicly Listed
Headquarters: San Francisco, United States
Founded: 2012
WebsiteLinkedIn