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Staff Software Engineer, Backend (Fraud Decisioning)

Affirm - Remote - Remote - posted 2026-10-09

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Salary: CAD 181,000 - 241,000 / annual

Affirm is seeking a Staff Software Engineer to lead projects and initiatives on the Fraud Decisioning team. You will be responsible for building tools and systems that empower Affirm's fraud-fighting capabilities, working with cross-functional teams to adopt and monitor these systems, and using analytics and data-driven decisions to improve the performance and quality of fraud deciders. The mission is to drive growth while protecting Affirm, buyers, and merchants by leveraging data to evaluate risk at critical points in the user journey, adapting to the evolving fraud landscape, and introducing new fraud-fighting capabilities. Key responsibilities include: - Planning and executing large, cross-functional initiatives across the organization, including project definition, technical specification, task breakdown, delivery, monitoring, and maintenance - Designing simple and elegant systems that are easily deployed and debugged while anticipating failure modes; writing high-quality, understandable code that others can leverage - Reviewing others' work and providing constructive feedback to maintain high and consistent quality standards across teams - Leading and mentoring engineers to help them succeed and grow; providing context and training to enable ownership of initiative components - Incorporating stakeholder needs and opinions, advocating for ideas and initiatives, and creating shared understanding where all voices are heard - Conducting technical and soft skill evaluations to inform hiring decisions; developing and reviewing technical content and interview requirements Requirements: - 6-10+ years of experience as a software engineer with leadership responsibilities and experience mentoring junior engineers - Prior experience architecting, building, launching, coding, and maintaining complex systems - Passion for working with cross-functional teams including Product, ML, Analytics, and Business teams - Technical leader and team builder who can mentor the team in software development best practices - Expert at synthesizing complex business, product, and technical requirements to produce high-quality system designs and software - System architect who can see the big picture and envision how business and product requirements can be broken into system modules or components - Bachelor's degree in a related field or equivalent practical experience

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