Senior Data Scientist
Hybrid (Fort Lauderdale Office)Full-timePosted 3w ago
About the role
Senior Data Scientist role at Haystack News focusing on advanced statistical analysis, modeling, causal inference, experimental design (A/B testing), and data analytics to improve user engagement and retention in a hybrid Fort Lauderdale office.
Responsibilities
- Build statistical and machine learning models to improve content discovery and user engagement.
- Work closely with ML engineers to translate models and insights into production systems.
- Have curiosity and apply analytical skills to dive deep into data to find key insights that would impact the business.
- Apply causal inference methods to understand the impact of potential product changes.
- Define and build new ML features using text and multimodal embeddings and GenAI.
- Validate offline learnings with online outcomes through AB testing. Design, execute, and analyze experiments to prove product change attribution.
Qualifications
- PhD or M.S. in Computer Science, Mathematics, Electrical Engineering, Statistics, Economics or Operations Research with 5+ years of professional experience in data science, machine learning or related quantitative field
- 3+ years of professional experience with large-scale online ranking/recommender systems (for news feeds, shopping, ads, music, etc).
- Deep expertise in statistical inference and experimental design: hypothesis testing, power/sample size calculations, variance reduction, etc.
- Proficiency in causal inference methods to measure product impact.
- Proven ability to translate offline analysis into product decisions and measurable improvements in online metrics.
- Fluency in the Python analytics stack (pandas, NumPy), statistical modeling (statsmodels or scikit-learn) and machine learning packages such as LightGBM and XGBoost.
- Strong experience with SQL (e.g. postgres, snowflake, etc).
Last updated Sep 30, 2026. Interested? Apply on the company site.
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