Sr Applied Scientist

As AI systems—particularly LLMs and agentic AI—become core to our products and internal platforms, understanding how these systems fail is just as important as improving their performance. We are looking for a Senior Applied Scientist to join our AI Red Teaming efforts and focus on adversarial evaluation, failure analysis, and risk discovery in AI models and AI agents. In this role, you will systematically probe AI systems to uncover unsafe, unintended, or harmful behaviors, including prompt injection, jailbreaks, behavioral drift, tool misuse, and context or memory poisoning. You will design experiments, build evaluation frameworks, and analyze outcomes to surface risks that traditional ML metrics do not capture. This role is ideal for a data scientist who enjoys working at the edge of model behavior, cares deeply about safety and robustness, and wants to apply scientific rigor to securing real-world AI systems. What the Candidate Will Do Design and execute AI red‑teaming experiments against LLMs and AI agents to identify prompt injection (direct & indirect), jailbreaking and policy bypass, model and tool poisoning, context and memory poisoning, behavioral drift and unsafe autonomy Develop adversarial datasets, probes, and test harnesses to systematically evaluate model and agent behavior under attack. Define and track AI risk metrics beyond accuracy (e.g., failure rates, drift indicators, unsafe action likelihood, confidence miscalibration). Analyze agent workflows and decision traces to understand how failures emerge across multi‑step reasoning and tool use. Collaborate with security engineers and AI platform teams to translate findings into guardrails, mitigations, and design improvements. Build reusable evaluation pipelines to support continuous red‑teaming and regression testing as models and agents evolve. Basic Qualifications 5+ years of experience as a Data Scientist, Applied Scientist, or ML Scientist. Hands‑on experience working with LLMs or generative AI systems. Direct experience with AI red teaming, model safety, or adversarial evaluation. Direct experience with prompt injection, jailbreaks, and LLM failure modes. Strong background in experimental design, evaluation, and statistical analysis. Experience analyzing complex model behavior and failure cases beyond standard metrics. Proficiency in Python and common DS/ML tooling. Preferred Qualifications Experience evaluating agentic systems, including tool use, memory, or multi‑step workflows. Knowledge of GenAI architectures (transformers, embeddings, RAG, agent frameworks). Experience building custom evaluation datasets or simulation environments. Background or strong interest in security, privacy, or trust & safety. Familiarity with AI evaluation tools (e.g., custom judges, LLM‑as‑judge, simulation frameworks). For New York, NY‑based roles: The base salary range for this role is USD$190,000 per year - USD$211,000 per year. For San Francisco, CA‑based roles: The base salary range for this role is USD$190,000 per year - USD$211,000 per year. For Seattle, WA‑based roles: The base salary range for this role is USD$190,000 per year - USD$211,000 per year. For Sunnyvale, CA‑based roles: The base salary range for this role is USD$190,000 per year - USD$211,000 per year. All full‑time employees are eligible to participate in a 401(k) plan. You will also be eligible for various benefits. More details can be found at Uber is proud to be an Equal Opportunity employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you have a disability or special need that requires accommodation, please let us know by completing this form. Ready to Ride? This isn't the kind of place where you follow a playbook — it's where you help write one. If you're driven by impact, energized by challenge, and ready to shape how the world moves — we'd love to hear from you. #J-18808-Ljbffr Uber