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🥝 Machine Learning Engineer
The Fountain Group LLC | Mountain View, California, United States | Posted May 16, 2026
Job Description
PAY: $100-110/hour W2. Our company offers our consultants a suite of benefits after a qualification period including health, vision, dental, life and disability insurance.
Onsite role in Mountain View, CA (any hybrid work will be at the manager’s discretion) W2 Candidates onlyPosition Summary
- Seeking an experienced Machine Learning Engineer to lead the development of prompt injection and prompt safety models that protect downstream agentic AI systems across phone, cloud, and XR/AR.
- Role will design, train, and deploy classifier and guardrail models (both cloud-based and hybrid on-device) that screen agent inputs and outputs for injection attacks, unsafe content, and policy violations. A core part of the role is post-training these models with RLHF, DPO, and related optimization techniques to push detection accuracy and false-positive rates beyond what off-the-shelf solutions prov...