Character.AI

Research Engineer, AI Safety Alignment

Character.AI Redwood City, CA
Full-time $225k - $400k Posted about 5 hours ago

Responsibilities

  • check_circle Develop and implement novel evaluation methodologies and metrics to assess the safety and alignment of large language models.
  • check_circle Research and develop cutting-edge techniques for model alignment, value learning, and interpretability.
  • check_circle Conduct adversarial testing to proactively uncover potential vulnerabilities and failure modes in our models.
  • check_circle Analyze and mitigate biases, toxicity, and other harmful behaviors in large language models through techniques like reinforcement learning from human feedback (RLHF) and fine-tuning.
  • check_circle Collaborate with engineering and product teams to translate safety research into practical, scalable solutions and best practices.
  • check_circle Stay abreast of the latest advancements in AI safety research and contribute to the academic community through publications and presentations.
  • check_circle Hold a PhD (or equivalent experience) in a relevant field such as Computer Science, Machine Learning, or a related discipline.
  • check_circle Write clear and clean production-facing and training code
  • check_circle Experience working with GPUs (training, serving, debugging)
  • check_circle Experience with data pipelines and data infrastructure
  • check_circle Strong understanding of modern machine learning techniques, particularly transformers and reinforcement learning, with a focus on their safety implications.
  • check_circle Are passionate about the responsible development of AI and dedicated to solving complex safety challenges.

Preferred qualifications

  • Experience with product experimentation and A/B testing
  • Experience training large models in a distributed setting
  • Familiarity with ML deployment and orchestration (Kubernetes, Docker, cloud)
  • Experience with explainable AI (XAI) and interpretability techniques.
  • Have research in AI safety, alignment, ethics, or a related area.
  • Knowledge of the broader societal and ethical implications of AI, including policy and governance.
  • Publications in relevant academic journals or conferences in the field of machine learning

About the company

Joining us as a Research Engineer, you'll be at the forefront of tackling one of the most critical challenges in AI today: safety and alignment. Your work will be pivotal in understanding and mitigating the risks of advanced AI, conducting foundational research to make our models safer, and solving the core technical problems of AI alignment—ensuring our models behave in accordance with human values and intentions.

The Safety team is dedicated to pioneering and implementing techniques that make our models more robust, honest, and harmless. As a Research Engineer, you will bridge the gap between theoretical research and practical application, writing high-quality code to test hypotheses and integrating successful safety solutions directly into our products. Your research will not only protect millions of users but also contribute to the broader scientific community's understanding of how to build safe, beneficial AI.

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