Data Scientist II at Signifyd

São Paulo, SP

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Signifyd is a fraud protection platform helping merchants grow their businesses by building trusted relationships with their customers. The Data Scientist II role is part of the Applied Decision Science team, which focuses on feature engineering, client-specific models, and fraud mitigation. The position involves building production machine learning models, designing new algorithms, writing analytical code, researching real‑time fraud patterns, working with distributed data pipelines, and collaborating with engineering and product teams.

Requirements

Education

  • Bachelor's degree in computer science, applied mathematics, economics, or an analytical field
  • Advanced degree (M.S. or Ph.D.) in an analytical field

Experience

  • At least 3+ years of experience

Skills

  • Statistical analysis
  • Designing experiments
  • Python programming
  • Java programming
  • SQL
  • Linux command line
  • Code review
  • Writing production-grade code

Languages

  • English

Responsibilities

  • Building production machine learning models that identify fraud
  • Designing new algorithms that optimize all the key components of the Signifyd Commerce Protection Platform
  • Writing production and offline analytical code in Python and Java
  • Researching real‑time emerging fraud patterns with the Risk Analysis team
  • Working with distributed data pipelines
  • Communicating complex ideas effectively to a variety of audiences
  • Collaborating with engineering teams to continuously strengthen our machine learning pipeline
  • Mentoring other members of the team

Technologies

PythonJavaSQLLinux command lineDistributed data pipelines

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