Mid Level AI Models Engineer
WHO WE ARE
Healthcare needs a better rhythm: one that keeps care continuous and deeply human. Heidi is building an AI Care Partner that works alongside clinicians to make that possible.
We’re a team of doctors, engineers, designers, researchers, and creatives building tools that help clinicians stay focused on what matters most: their patients.
In just 18 months, Heidi has given back more than 18 million hours to healthcare professionals — supporting 73 million patient visits in 116 countries. Today, more than two million patient visits each week are powered by Heidi worldwide.
Backed by nearly $100 million in funding, we’re growing in the US, UK, Canada, and Europe, partnering with leading health systems including the NHS, Beth Israel Lahey Health, and Monash Health.
THE ROLE
Working closely with our Engineering Manager, you’ll be an AI Model Engineer on the Model Platform team. You are a core contributor to advancing the capabilities of our foundational models.
Your mission is to apply your deep technical expertise to run experiments, implement cutting-edge fine-tuning techniques (SFT, RLFT), and systematically improve the performance, safety, and efficiency of our LLMs.
WHAT YOU’LL DO:
- Own Model Fine-Tuning Cycles: Independently run end-to-end fine-tuning experiments, from data curation and setup to analysis and reporting.
- Partner with product, medical knowledge and design teams to automate prompt engineering, build agentic AI, create model evaluation frameworks.
- Build cutting-edge LLM features within Heidi using the latest tools and frameworks
- Implement Advanced Techniques: Implement and adapt state-of-the-art algorithms from research papers to solve specific product challenges.
- Deep-Dive Model Analysis: Conduct in-depth analysis of model behaviour, identifying failure modes and proposing data- or algorithm-based solutions.
- Contribute to Core Infrastructure: Help build and improve the core training and experimentation infrast...