Senior Machine Learning Engineer - Fraud

Plaid is a financial data network and fintech infrastructure company that helps people securely connect financial accounts to digital financial services.

Series D0 current maintainers0 active leadsTeam intelligence

Maintainer signals as of 9/2/2026

San Francisco, United States

Funding history

About Plaid Inc.

Plaid provides developer infrastructure and financial tools for account connectivity, financial data access, bank payments, identity verification, AML monitoring, credit and underwriting, and fraud prevention. Its network supports thousands of fintech companies and more than 12,000 financial institutions across the United States, Canada, the United Kingdom, and Europe.

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Skills

Candidate Availability

Required and preferred rules are kept separate and reflect the wording in the original posting.

About the Role

You will develop fraud detection models from experimentation through production deployment. You will investigate fraud patterns, engineer training data and features, design experiments, build reproducible pipelines, and improve model performance using customer outcomes.

Requirements

  • 7+ years of professional machine learning, applied science, or ML software engineering experience.
  • Experience designing, training, tuning, deploying, and evaluating models in production.
  • Machine learning and statistical fundamentals including feature engineering, experiment design, and model evaluation.
  • Knowledge of gradient-boosted trees and neural networks.
  • Experience addressing label quality, data leakage, class imbalance, and generalization.
  • Python and SQL proficiency.
  • Experience with PyTorch, scikit-learn, XGBoost, or equivalent frameworks.
  • Experience leading end-to-end machine learning projects.

Responsibilities

  • Investigate fraud patterns and model errors to identify signals and improve detection.
  • Develop training datasets and predictive features.
  • Design, train, tune, and evaluate machine learning models.
  • Design experiments to evaluate features and models.
  • Build data and training pipelines for reproducible experimentation.
  • Deploy models while balancing quality, latency, cost, and reliability.
  • Lead machine learning projects through model release.

Benefits

  • Medical insurance
  • Dental insurance
  • Vision insurance
  • 401(k)
Senior Machine Learning Engineer - Fraud at Plaid Inc. | JobStash