ML Engineer
Senior Machine Learning Engineer focused on developing and optimizing small language models for personalized healthcare experiences, leveraging Python, PyTorch, and advanced NLP techniques to deliver high-performance AI solutions on League’s consumer health platform.
About League
Founded in 2014, League is the leading healthcare consumer experience (CX) platform, powered by artificial intelligence (AI), reaching more than 63 million people around the world and delivering the highest level of personalization in the industry. Payers, providers, and consumer health partners build on League’s platform to deliver high-engagement healthcare solutions proven to improve health outcomes. League has raised over $285 million in venture capital funding to date, powering the digital experiences for some of healthcare’s most trusted brands, including Highmark Health, Manulife, Medibank, and Shoppers Drug Mart.
Position Summary
League is seeking a Senior ML Engineer to join our AI Models team, focused on advancing innovation in small language models (SLMs) and applied AI systems.
This role sits at the intersection of research and engineering , with a strong emphasis on experimentation, model development, and applied system design . You will work closely with AI leadership to explore, prototype, and operationalize new approaches to domain-specific language models that power League’s healthcare platform.
Unlike a traditional engineering role, this position is R&D-focused , designed for someone who can:
You will contribute to building League’s next generation of AI capabilities, while partnering with platform and product teams to bring high-impact innovations into production.
In this role, you will:
Model Development & Experimentation
Applied AI & Systems Integration
Data & Training Strategy
Evaluation & Model Quality
Posted June 18, 2026