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Job listing

London, United KingdomNot Disclosed

AI/ML Engineer at Global Consumer Healthtech Platform

Join the world’s leading consumer health platform and help build the next generation of AI-powered digital health tools. As an AI/ML Engineer on the central platform team, you will design the infrastructure that enables safe, medical-grade AI at a scale of 77 million monthly users. From fine-tuning LLMs to building automated MLOps pipelines, this is a rare opportunity to work at the intersection of generative AI and clinical safety within a unicorn-valuation startup backed by world-class investors.

Overview

Role overview

You will join a specialized AI Platform team to build and scale shared infrastructure enabling safe, efficient AI integration across a massive global product. The role involves fine-tuning large language models, optimizing MLOps pipelines, and developing evaluation frameworks to ensure medical safety and high performance for over 70 million monthly users worldwide.

Company

About the company

Global consumer healthtech platform

Responsibilities

What you will do

  • Develop, fine-tune, and optimize proprietary and open-source large language models for domain-specific health applications.
  • Design and maintain automated pipelines for model training, evaluation, and deployment across diverse AI workloads.
  • Build LLM evaluation frameworks to measure model safety, medical accuracy, and overall performance at scale.

Candidate profile

Who this is a fit for

  • Has 4+ years of professional experience building and deploying production-grade AI/ML systems within a cloud environment.
  • Possesses deep engineering experience with LLM infrastructure, including fine-tuning techniques like LoRA and SFT.
  • Is proficient in Python and modern ML tools such as Databricks, MLflow, and experiment tracking systems.

What makes it remarkable

Why this role is remarkable

  • Work on a product with over 500 million downloads, directly impacting the health and wellness of a massive global user base.
  • Join a unicorn-valuation organization backed by top-tier global private equity and venture capital firms.
  • Lead the transition into a privacy-first, AI-powered future by building the central infrastructure that powers every product team's AI initiatives.

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