Staff Machine Learning Engineer - Policy & Safety

What You Will Do

Build and scale machine learning systems for proactive content detection, classification, and pre-publish safety scanning

Design and implement policy evaluation frameworks, including standardized datasets, offline and online metrics, and continuous improvement loops

Develop multimodal models that combine text, audio, image, and video signals for safety and policy enforcement

Architect feedback loops that turn reviewer input into structured training data for continuous model improvement

Translate regulatory requirements into scalable ML system designs, including accuracy and reporting expectations

Partner with cross-functional teams across Trust & Safety, Legal, Public Affairs, and Product to deliver safe user experiences

Drive technical direction in ambiguous problem spaces and contribute to long-term platform architecture

Mentor and support other machine learning engineers, helping grow technical capability across the team

Who You Are

You have experience building and shipping production-grade machine learning systems at scale

You are experienced with ML evaluation, including dataset design, metrics, and model performance monitoring

You have worked with multimodal machine learning across text, audio, image, or video domains

You have experience with human-in-the-loop systems, active learning, or feedback-driven model improvement

You are comfortable translating complex requirements into technical solutions, including policy or regulatory constraints

You are experienced working across teams and influencing technical direction in large systems

You are comfortable navigating ambiguity and making thoughtful trade-offs between speed, quality, and risk

You communicate clearly and collaborate effectively with both technical and non-technical partners

Where You Will Be

This role is based in London or Stockholm

We offer you the flexibility to work where you work best! There will be some in person meetings, but still allows for flexibility to work from home.