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Senior Staff Machine Learning Engineer, (ML Fraud)

Affirm

$232,000 - $310,000
Dec 10, 2025
Remote, US
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Affirm is looking to solve the problem of making credit more honest and friendly by utilizing advanced machine learning techniques to ensure responsible and accessible financial products.

Requirements

  • 10+ years of experience researching, designing, deploying, and operating large-scale, real-time machine learning systems, with a proven record of driving technical innovation and delivering measurable business impact.
  • Experience leading end-to-end ML system design, from data architecture and feature pipelines to model training, evaluation, and production deployment.
  • Proficient in Python and ML frameworks, including PyTorch and XGBoost.
  • Experienced with ML tooling for training orchestration, experimentation, and model monitoring, such as Kubeflow, MLflow, or equivalent internal platforms.
  • Strong understanding of representation learning and embedding-based modeling.
  • Deep expertise in neural network-based sequence modeling, including architectures such as Transformers, recurrent, or attention-based models, and multi-task learning systems.
  • Deep hands-on experience with large-scale distributed ML infrastructure, including streaming or batch data ingestion, feature stores, feature engineering, training pipelines, model serving and inference infrastructure, monitoring, and automated retraining.

Responsibilities

  • Define and drive multi-year, multi-team technical strategy for machine learning across Affirm, ensuring alignment with company-wide priorities and influencing the roadmaps of partner teams and platforms.
  • Lead the design, implementation, and scaling of advanced ML systems, setting the architectural direction for complex, cross-functional initiatives and ensuring systems remain reliable, extensible, and prepared for increasingly sophisticated modeling workloads.
  • Partner deeply with ML Platform, product, engineering, and risk leadership to shape long-term modeling capabilities, define new opportunities for ML impact, and guide infrastructure evolution required for next-generation ML methods.
  • Provide broad technical leadership across the ML organization, mentoring senior engineers, elevating design and code quality, and spreading ML expertise through documentation, talks, and cross-org guidance.
  • Drive clarity and alignment on ambiguous, high-stakes technical decisions, resolving cross-team tensions, balancing competing priorities, and exercising judgment optimized for the broader engineering organization.
  • Champion operational and system excellence at the area level, owning the long-term health, availability, and evolution of critical ML systems, and ensuring robust testing, monitoring, and reliability practices across teams.

Other

  • Bachelor’s degree in a related field.
  • Strong verbal and written communication skills that support effective collaboration across our global engineering organization.
  • Equivalent practical experience or a Bachelor’s degree in a related field.
  • Ability to work remotely, with occasional requirements to work out of an assigned Affirm office.
  • Ability to provide reasonable accommodations to candidates in need of individualized support during the hiring process.