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Leega

Senior Data Scientist, Chatbot, AI

Leega

Senior Data Scientist at Leega creating chatbot solutions and AI models for identifying transactional fraud. Collaborating closely with business areas to deliver innovative data-driven strategies.

Posted 6/16/2026full-timeRemote • BrasilSeniorWebsite

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Hard Skills
mathematical solutionsstatistical solutionsprogrammatic statistical modelsdata collectiondata analysismodelingtransactional chatbot modelsAI modelsfraud detectiondata correlation models
Soft Skills
leadershipproject managementcommunicationteachingcollaboration
Tools & Technologies
dashboardsdata visualization tools
Certifications & Qualifications
Degree in Data Science
Industry Keywords
machine learningproject lifecyclebusiness requirementsdecision engine rulestransactional fraud

About the role

Key responsibilities & impact
  • Must be able to lead an entire project with minimal supervision, designing and building mathematical/statistical solutions according to business requirements.
  • From the initial meeting, define the project scope with the business area, translating requirements into programmatic statistical models.
  • Analyze timelines and trade-offs between techniques and business needs; implement all project stages (data collection and analysis, formatting for model ingestion, modeling, and generation of usable outputs).
  • Must also be able to guide and teach any part of the machine learning project lifecycle to less experienced team members.
  • Liaise with the business area regarding any needs during the project.
  • Development of transactional chatbot models.
  • Create AI models to apply rules for identifying transactional fraud.
  • Correlate datasets.
  • Create dashboards to visualize the key established metrics.
  • Document the development technically.

Requirements

What you’ll need
  • Degree in Data Science.
  • Experience building chatbots and data correlation models.
  • Advantage: experience with fraud detection and decision engine rules.

Benefits

Comp & perks
  • Porto Seguro health plan.
  • Porto Seguro dental plan.
  • Profit Sharing (PLR).
  • Childcare allowance.
  • Alelo meal and grocery vouchers.
  • Home office allowance.
  • Partnerships with educational institutions.
  • Support for certifications, including cloud certifications.
  • Livelo reward points.
  • TotalPass (transportation benefit).
  • Mindself (mental health/wellbeing program).