Lead Data Scientist

Haystack
Milwaukee, Wisconsin, United StatesFull-timePosted Sep 14, 2026

About the role

A world-leading actuarial science and technology consultancy creates and deploys category-defining, data-driven software-as-a-service (SaaS) products for a broad spectrum of insurance, health IT, and life sciences clients. They offer an entrepreneurial and collaborative culture that values innovation, excellence, and transparency, ensuring employees have a voice and room for career growth.

The Role

Research, develop, deploy, and maintain traditional AI/ML models following industry best practices

Work extensively with available GenAI models, constructing solutions for internal and external use cases

Coordinate with Product, Business Development, ML Engineering, and IT to bring new data science products to market

Drive best practices and continuous improvement on the data science team, influencing model design and experimentation strategy

Build upon data science, machine learning, and GenAI/NLP expertise to enhance existing products through new solutions

Construct, validate, document, and deliver sophisticated GenAI and machine learning solutions for healthcare problems

What You'll Need

10+ years of professional experience using AI/ML to create high ROI commercial data science solutions

Expertise with Electronic Health Records or unstructured data analysis

Expert data scientist with demonstrable capability building traditional AI/ML models (e.g., supervised/unsupervised learning, deep learning, NLP)

Expert understanding of NLP and generative AI, with hands-on experience building GenAI applications

Expert level Python programmer, with experience in R and/or SQL

Expert user of Databricks or similar cloud-based model development ecosystems

Sufficient understanding of software engineering best practices (Git, unit testing, local development)

Degree in a relevant field (computer science, data science, statistics, mathematics, actuarial science, economics)

What's On Offer

Entrepreneurial and collaborative culture with a focus on innovation and work-life balance

Competitive compensation and benefits

Opportunities for skills training, career development, and mentoring

Employee Resource Groups (ERGs) and commitment to diversity and inclusion

Apply via Haystack today!

Responsibilities

  • Research, develop, deploy, and maintain traditional AI/ML models
  • Work extensively with available GenAI models for internal and external use cases
  • Coordinate with Product, Business Development, ML Engineering, and IT
  • Drive best practices and continuous improvement on the data science team
  • Build upon data science, machine learning, and GenAI/NLP expertise
  • Construct, validate, document, and deliver sophisticated GenAI and machine learning solutions

Qualifications

  • 10+ years of professional experience using AI/ML
  • Expertise with Electronic Health Records or unstructured data analysis
  • Expert data scientist with capability in traditional AI/ML models
  • Expert understanding of NLP and generative AI
  • Expert level Python programmer, with experience in R and/or SQL
  • Expert user of Databricks or similar cloud-based model development ecosystems
  • Sufficient understanding of software engineering best practices
  • Degree in a relevant field

Benefits

  • Entrepreneurial and collaborative culture
  • Competitive compensation and benefits
  • Opportunities for skills training and career development
  • Employee Resource Groups (ERGs) and commitment to diversity and inclusion

Skills mentioned

PythonRSQLDatabricksMachine LearningDeep LearningSupervised LearningUnsupervised LearningGenerative AILarge Language Models

About Haystack

Haystack combines AI & expert vetting to deliver world-class tech candidates who are engaged, aligned, and ready to interview. We're trusted by over 400,000+ tech candidates, working in Software Engineering, Data, Design, DevOps, Cloud, Tech Management, Testing, Product & Delivery, Architecture and more. 100s of employers from startups and scale-ups like Atom Bank, DuckDuckGo and Goodlord to established enterprises like American Express, Dunelm and AWS use Haystack to connect with qualified tech talent that they can't find anywhere else.

Technology51-200 employeesNewcastle upon Tyne, England