✦ Luna Orbit — AI & Machine Learning

Principal Associate, Data Scientist, SBB Fraud

at Capital One Financial

📍 McLean, VA Unknown 💰 $161K – $184K USD / year Posted April 15, 2026
Salary $161K – $184K USD / year
Type Not Specified
Experience lead
Exp. Years Not specified
Education Not specified
Category AI & Machine Learning

Principal Associate Data Scientist (SBB Fraud) role building machine learning models to protect Small Business Bank customers against fraud. You will develop and deploy fraud models through the full lifecycle and communicate results into business goals.

  • Build machine learning models through design, training, evaluation, validation, and implementation
  • Leverage Python, Conda, AWS (Amazon Web Services), H2O, Spark for fraud insights
  • Partner cross-functionally to deliver fraud-focused products
  • Validate and backtest models using confusion matrix and ROC curve
  • Translate modeling complexity into tangible business goals

Use Python with AWS (Amazon Web Services), H2O, and Spark to build machine learning fraud models. Apply statistical and ML methods including clustering, classification, sentiment analysis, time series, and deep learning, with evaluation via confusion matrix and ROC curve and strong backtesting practices.

The ideal candidate is a data scientist with strong hands-on experience building and validating machine learning fraud models for small business banking use cases. They can demonstrate proficiency with Python, AWS (Amazon Web Services), H2O, and Spark, and have measurable modeling expertise using metrics like confusion matrices and ROC curves.

Pythonmachine learning modelsbacktested modelsconfusion matrixROC curveclusteringclassificationdata retrieval and analysisopen-source toolscloud computing platforms
H2Osentiment analysistime seriesdeep learning
PythonCondaAWSAmazon Web ServicesH2OSpark
PythonCondaAWSAmazon Web ServicesH2OSparkmachine learning modelsconfusion matrixROC curvebacktestingclusteringclassificationsentiment analysistime seriesdeep learningfraud modelsopen-source toolscloud computing platforms
PythonCondaAmazon Web ServicesAWSH2OSparkmachine learning modelsmodel developmentmodel trainingmodel evaluationmodel validationmodel implementationbacktestingconfusion matrixROC curveclusteringclassificationsentiment analysistime seriesdeep learningretrieving datacombining dataanalyzing numeric and textual datadata science solutionsopen-source toolscloud computing platformsfraud modelsaccount opening fraudaccount takeover fraudtransaction fraud detectionsmall business fraud data science
customer firstinterpersonal skillstranslating complexity into tangible business goalscross-functional collaboration
Industry Banking
Job Function Develop and deploy fraud detection and prevention machine learning models for small businesses.
Role Subtype Data Scientist
Tech Domains Python, Amazon Web Services, AI & Machine Learning, SQL / PostgreSQL
Principal AssociateData ScientistSBB Fraudsmall business bank fraud data sciencePythonSQLCondaAWSAmazon Web ServicesH2OSparkmachine learning modelsconfusion matrixROC curvebacktestedclusteringclassificationsentiment analysistime seriesdeep learningfraud modelsaccount openingaccount takeovercross-functionalopen-sourcecloud computing platforms

Must have experience building validated and backtested machine learning models, Must demonstrate knowledge of confusion matrix and ROC curve, Must have hands-on experience with Python and AWS (Amazon Web Services)

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