Senior Data Scientist

Job Description

Job Description

Haystack News , the number one destination for news on streaming platforms, is looking for a Sr Data Scientist to join our team. Haystack is trusted by over 30 million viewers and is among the fastest-growing TV news companies in the world.

Join our team at Haystack News as a Senior Data Scientist and become a pivotal force in redefining user experiences through cutting-edge algorithm enhancements. In this role, you'll leverage your advanced statistical analysis, causal inference, experimental design (A / B testing) and data analytics expertise to drive substantial improvements in user engagement and retention, directly impacting our product's success. This is an exceptional opportunity to showcase your robust problem-solving capabilities and to 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.

MINIMUM QUALIFICATIONS

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).

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).

PREFERRED QUALIFICATIONS :

2+ years of professional experience with large-scale recommender systems (for news feeds, shopping, ads, music, etc).

Hands-on experience with orchestration / transformation tools (e.g. dbt and Airflow).

Experience with deep learning and being familiar with tools such as PyTorch or TensorFlow.

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.