Senior Data Scientist

Company: Hims & Hers
Apply for the Senior Data Scientist
Location: London
Job Description:

  • Translate complex business challenges into scalable data products and machine learning models
  • Own projects from exploratory analysis through production deployment
  • Write complex SQL and engineer features
  • Deploy baseline models quickly and iterate toward more complex solutions
  • Manage the complete model lifecycle, including data extraction, feature engineering, deployment, A/B testing, and performance monitoring
  • Partner with Engineering, Product, Business, and Finance stakeholders to define technical requirements and translate model outputs into actionable insights
  • Write clean, modular, production-ready code
  • Participate in peer code reviews and contribute to technical best practices
  • Break down ambiguous, complex requirements into executable milestones
  • Provide technical guidance to junior data scientists and analysts

Requirements

  • 5+ years of applied experience in Data Science or ML Engineering
  • Track record of delivering production-ready models that drive measurable business value
  • Strong expertise in Python and SQL
  • Deep familiarity with pandas, NumPy, scikit-learn, and standard ML frameworks such as PyTorch, XGBoost, or LightGBM
  • Experience working in cloud-based environments such as AWS or GCP
  • Familiarity with CI/CD workflows, Git, and MLOps principles
  • Ability to connect technical metrics to business outcomes and select appropriate algorithms
  • Ability to explain technical concepts, model limitations, and analytical findings to non-technical stakeholders
  • BS, MS, or equivalent experience in a quantitative field
  • Preferred: experience taking initial machine learning models from exploratory notebooks to automated production pipelines
  • Preferred: experience in customer behavior and propensity modeling, forecasting, optimization, or causal inference

Core Competencies

Demonstrates expertise in Data Science and Machine Learning Engineering, with a strong focus on developing production-ready models that deliver measurable business value. Proficient in Python, SQL, and various ML frameworks, with the ability to translate complex data challenges into actionable insights for stakeholders.

Highest-signal resume keywords

  • Python Programming
  • SQL Proficiency
  • Machine Learning Model Development
  • Cloud-Based Environments (AWS, GCP)
  • Data Lifecycle Management

Hard Skills

  • Data Science
  • Machine Learning Engineering
  • Feature Engineering
  • A/B Testing
  • Performance Monitoring
  • Model Deployment
  • Exploratory Data Analysis
  • Technical Documentation
  • Algorithm Selection
  • Statistical Analysis

Soft Skills

  • Technical Communication
  • Collaboration
  • Mentoring
  • Problem-Solving
  • Adaptability

Industry Keywords

  • Data Products
  • Business Insights
  • Customer Behavior Modeling
  • Forecasting
  • Optimization
  • Causal Inference

Tools & Technologies

  • Pandas
  • NumPy
  • Scikit-Learn
  • PyTorch
  • XGBoost
  • LightGBM
  • Git
  • CI/CD Workflows
  • MLOps Principles
  • Cloud Platforms

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Posted: September 15th, 2026