Haystack News is looking for a Sr Data Scientist to redefine user experiences through cutting-edge algorithm enhancements, aiming to drive substantial improvements in user engagement and retention.
Requirements
- Deep expertise in statistical inference and experimental design: hypothesis testing, power/sample size calculations, variance reduction, etc.
- Proficiency in causal inference methods.
- Proven ability to translate offline analysis into online impact.
- 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).
- 2+ years of professional experience with large-scale recommender systems (for news feeds, shopping, ads, music, etc).
- Hands-on development of products/tools incorporating GenAI, LLMs, RAG, and/or Agents.
Responsibilities
- Work cross-functionally to translate business problems into testable analyses and experiments.
- Have curiosity and apply analytical skills to dive deep into data to find key insights that would impact the business.
- Define and evolve trustworthy KPIs and guardrail metrics for user engagement, retention, and monetization.
- Develop and deploy machine learning models to make recommendations and influence the product roadmap.
- 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.
Other
- PhD degree; or M.S. +5 years in Computer Science, Mathematics, Electrical Engineering, Statistics, Economics or Operations Research.
- 3+ years professional experience applying statistical methods to real product/business problems at scale (leading analysis end-to-end and influencing decisions).
- thrive in a collaborative environment, working alongside a team of passionate professionals dedicated to innovation and excellence.
- Be part of a dynamic workplace where your contributions make a meaningful difference and help shape the future of news consumption.
