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Harnham
Harnham

Staff GTM Data Scientist

Location

Remote restrictions apply
See all remote locations

Salary Estimate

N/AIconOpenNewWindows

Seniority

Staff

Tech stacks

Data
Testing
Data Science
+17

Permanent role
a day ago
Apply now

Staff GTM Data Scientist

Location: Remote

Salary: $190-220k base

We're partnering with a fast-growing SaaS company to find a Staff Data Scientist for a senior, high-visibility role sitting at the heart of their product and go-to-market strategy. This isn't a reporting role or a dashboard-builder position. It's for someone who can drive a genuine shift toward data-driven decision making across the organisation, and who has the technical depth and communication skills to bring leadership along with them.

What You'll Be Doing

  • Owning and advancing the company's experimentation roadmap, focusing on high-leverage questions around customer workflows, churn risk, and long-term value
  • Designing and analysing complex A/B tests, multivariate experiments, and Bayesian methods to assess the real impact of product and business changes
  • Applying causal inference techniques (DiD, synthetic control, propensity score matching, instrumental variables) where traditional RCTs aren't feasible
  • Building and governing a unified KPI framework that connects product health metrics to business outcomes
  • Partnering with Data Engineering to build scalable, self-serve experimentation tooling and reusable analytical frameworks
  • Translating complex statistical findings into clear, compelling narratives for VP and C-suite audiences
  • Mentoring and training junior and mid-level data scientists on experimental design and causal modelling

What We're Looking For

This is a senior individual contributor role reporting to the Director of GTM Data, acting as a strategic thought partner across Product, Marketing, Finance, and Engineering. The company is at an inflection point in how it uses data, and this person will be central to shaping that.

Essential:

  • 6+ years in applied data science, economics, or product analytics
  • Proven expertise in causal inference: DiD, PSM, instrumental variables, quasi-experimentation
  • Deep experience in A/B testing methodology including sequential testing, CUPED, variance reduction, and network effects
  • Advanced SQL and Python or R for statistical modelling
  • Experience with Snowflake or similar cloud data warehouses
  • Exceptional communication skills, comfortable presenting to and influencing C-suite stakeholders
  • Demonstrated ability to drive change in organisations where experimentation culture is still maturing

Nice to have:

  • Experience with dbt, Airflow, or Databricks
  • Background in SaaS and product data science

About Harnham

👥201-500
📍Wimbledon, London
🔗Website
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