Senior Machine Learning Engineer
Core
Building intelligent, privacy-aware browser experiences by embedding modern AI and LLM-driven features directly into Firefox.
Role type
Senior Machine Learning Engineer (Applied AI / Generative AI)
Builds
User-facing AI features and LLM applications within the Firefox browser
Domain
Consumer Internet / Browser Technology / Generative AI
Deliverable
production ML models
Required skills
Large language model (LLM) fine-tuning, Retrieval-augmented generation (RAG), Prompt engineering, Embedding-based retrieval, Model evaluation strategies, End-to-end model lifecycle management, Privacy-preserving ML concepts
Preferred skills
On-device model optimization, Web technologies integration, Open-source ML framework contributions
Technologies
Hugging Face, LangChain, Weights & Biases, Ray
Responsibilities
Develop and fine-tune LLMs for safe browser interactions, Apply RAG and intent modeling in real-world workflows, Design and implement experiments to test model behavior in production, Collaborate with product and engineering to launch features, Document work and participate in code reviews
Seniority
Senior, hands-on IC
