Senior Software Engineer role owning the design and delivery of a next-generation reliability platform for Affirm's production systems. You'll blend distributed systems engineering with AI-assisted development to help teams understand, debug, and improve service health.… Responsibilities include delivering quarterly team goals, leading engineers through ambiguous problems, collaborating with product and design, setting code review and design standards, and developing team talent. Required experience includes 4+ years as a software engineer, backend systems design at scale (Python, Kotlin, AWS, MySQL, Kubernetes), practical LLM/AI framework use, and high-quality code authorship.