Senior Data Scientist

Welltech is a global company with a mission to help people build healthy habits. They are looking for a Senior Data Scientist to design and deploy ML models that support critical business functions.

Requirements

• 3+ years (Mid) or 5+ years (Senior) of experience in Data Science or product analytics involving machine learning
• Strong proficiency in Python and SQL
• Hands-on experience with core DS/ML libraries such as NumPy, Pandas, Scikit-learn, XGBoost / CatBoost
• Solid understanding of core ML algorithms (gradient boosting, predictive models) and evaluation metrics (classification/regression metrics, business metrics)
• Proven experience developing, evaluating, and maintaining ML models for real business problems, especially forecasting and predictive modeling
• Practical experience building and maintaining end-to-end ML pipelines: data preparation, feature engineering, training, validation, deployment, and monitoring
• Hands-on experience with AWS services (e.g., SageMaker, Glue, Redshift, S3, Lambda)
• Understanding of MLOps practices: model versioning, automated retraining, monitoring, basic CI/CD
• Strong collaboration skills and experience working closely with Marketing, Product, and Engineering teams
• Ability to translate business problems into modeling tasks and explain model results to non-technical stakeholders
• Experience working with LLM APIs in applied use cases (e.g., automation, text processing, internal tools)