[Remote] Staff Product Data Scientist

Note: The job is a remote job and is open to candidates in USA. Harnham is a fast-growing SaaS company seeking a Staff Data Scientist for a senior, high-visibility role embedded in their product organization. The role involves owning the company's experimentation roadmap and designing complex A/B tests to measure the impact of product changes while mentoring junior data scientists.ResponsibilitiesOwning and advancing the company's experimentation roadmap, focused on high-leverage product questions around customer workflows, churn risk, and long-term valueDesigning and analysing complex A/B tests, multivariate experiments, and Bayesian methods to measure the real impact of product changesApplying causal inference techniques (DiD, synthetic control, propensity score matching, instrumental variables) where traditional RCTs aren't feasibleBuilding and governing a unified KPI framework that connects product health metrics to meaningful business outcomesPartnering with Data Engineering to build scalable, self-serve experimentation tooling and reusable analytical frameworksTranslating complex statistical findings into clear, compelling narratives for VP and C-suite audiencesMentoring and training junior and mid-level data scientists on experimental design and causal modellingSkills6+ years in applied data science, economics, or product analyticsProven expertise in causal inference: DiD, PSM, instrumental variables, quasi-experimentationDeep experience in A/B testing methodology including sequential testing, CUPED, variance reduction, and network effectsAdvanced SQL and Python or R for statistical modellingExperience with Snowflake or similar cloud data warehousesExceptional communication skills, comfortable presenting to and influencing C-suite stakeholdersDemonstrated ability to drive change in organisations where experimentation culture is still developingExperience with dbt, Airflow, or DatabricksBackground in SaaS and product data scienceCompany OverviewHarnham has actively chosen to focus on Data and Analytics. It was founded in 2006, and is headquartered in New York, New York, USA, with a workforce of 201-500 employees. Its website is https://www.harnham.com/us.Company H1B SponsorshipHarnham has a track record of offering H1B sponsorships, with 1 in 2024. Please note that this does not guarantee sponsorship for this specific role.