Data Scientist

We are looking for a Data Scientist to join an international tech hub in Lisbon.

Work setup: Hybrid – Lisbon, Portugal – 2 days on-site per week / 3 days remote.

Responsibilities:

• Design, build, and improve analytical and machine learning models to solve business problems and deliver measurable value
• Perform exploratory data analysis, data preparation, and feature engineering to support robust model development
• Develop, train, tune, and validate supervised and unsupervised machine learning models
• Apply statistical methods and probability concepts to analyze data, test hypotheses, and support decision-making
• Query and analyze data using SQL to extract insights and support model development
• Create clear visualizations and present findings to both technical and non-technical stakeholders
• Contribute to ML experimentation, model evaluation, and validation processes using standard tools and best practices
• Collaborate across multiple data teams to ensure quality, reliability, and alignment throughout the model lifecycle

Must-have requirements:

• 3 years of professional experience in data science environments
• Strong experience with Python, including NumPy, pandas, and scikit-learn
• Good understanding of machine learning model development, tuning, and validation for supervised and unsupervised approaches
• Solid experience in exploratory data analysis and feature engineering
• Strong foundation in statistics and probability
• Proficiency in SQL for data analysis and querying
• Experience with data visualization tools such as Matplotlib, Seaborn, Plotly, Power BI, or Tableau
• Understanding of ML experimentation tools and MLOps fundamentals
• Basic familiarity with cloud ML platforms such as Azure ML, AWS SageMaker, or GCP Vertex AI
• English proficiency at B2 level or above

If you’re interested, apply directly or send your CV with your daily rate and availability for a call to [email protected].