Data Scientist - Extensions

The role

You will research, develop, and productize data science capabilities to enhance NEXUS predictive performance. You will work on structured data problems including classification, regression, ranking, and forecasting.

What you will do

• Research and develop data science methods that improve NEXUS predictive performance
• Design and implement robust, production-quality Python components
• Develop strategies to help NEXUS handle real-world enterprise data
• Run rigorous experiments to measure the impact of new approaches
• Work across structured data problems including classification, regression, ranking, and forecasting
• Collaborate with Engineering and Research teams to understand NEXUS model behavior
• Work with Applied AI Engineers to validate approaches on real customer datasets
• Contribute to technical documentation and internal best practices

Required qualifications

• 5+ years of experience in data science or machine learning roles
• Strong Python skills, including fluency with pandas, numpy, and scikit-learn
• Deep hands-on experience with traditional ML models: XGBoost, LightGBM, CatBoost, and similar gradient boosting frameworks
• Solid understanding of what makes real-world tabular data challenging: class imbalance, high cardinality, distribution shift, missing values, and more
• Strong experimental mindset
• Ability to work autonomously and drive work from idea to shipped output

Nice to have

• Familiarity with tabular foundation models (TabPFN, CARTE, or similar)
• Competitive data science experience (Kaggle, DrivenData, or similar) - especially top finishes on tabular competitions
• Background in a domain where structured prediction matters: finance, supply chain, healthcare, retail, or industrial
• Experience contributing to or designing internal ML libraries or shared tooling
• Familiarity with DuckDB, Polars, or modern in-process analytics engines
• Comfort reading ML research papers and translating findings into practical implementations

Benefits

• Competitive compensation with salary and equity
• Comprehensive health coverage for you and your dependents
• Paid parental leave for all new parents, inclusive of adoptive and surrogate journeys
• Relocation support for employees moving to join the team in one of our office locations

About the company

Fundamental is an AI research lab pioneering the future of enterprise decision-making. Their flagship model, NEXUS, is a Large Tabular Model built for structured records.