Character.AI
Open positions
Research Engineer AI Safety and Alignment
You will develop safety and alignment evaluations, research alignment, value-learning, and interpretability techniques, and conduct adversarial testing of large language models. You will analyze and mitigate harmful…
Machine Learning Infrastructure Engineer
You will support machine-learning research and products with training and serving infrastructure. You will build tools to diagnose cluster and hardware failures, monitor deployments, manage experiments, and maximize…
Software Engineer Backend Applied ML Safety and Integrity
You will architect scalable backend systems for integrity and safety features. You will develop and operate machine-learning models for content classification, anomaly detection, risk scoring, behavior analysis, and…
Software Engineer Applied ML Discovery Recommendation and Search
You will work with product, data science, and data platform partners to design and implement applied ML models and infrastructure. You will build ML backend systems for recommendation, ranking, and search, including…
Technical Program Manager Model Alignment and Deployment
You will lead cross-functional programs for data collection, annotation, model alignment, safety testing, and model serving. You will coordinate research, safety, infrastructure, and UX workstreams; build evaluation…
Technical Program Manager, Model Alignment and Deployment
About the role Model Alignment and Deployment is a critical, cross-functional effort spanning our Post-Training, Safety Engineering, Trust & Safety, ML Infra/Model Serving, and User Experience Research (UXR) teams.…
Software Engineer, Backend/Applied ML (Safety & Integrity)
About the role We’re looking for a talented and creative Software Engineer to join our Safety Engineering team at ! In this role, you will be at the forefront of designing, developing, and scaling robust backend…
Software Engineer, Applied ML (Discovery, Recommendation & Search)
About the Role As a Software / ML Engineer you will work cross functionally with product, data science and data platform to identify, design and implement the applied ML models and infra, ranging from the model…
Software Engineer, Backend
About the Role We are looking for a talented and motivated Backend Engineer to join our team. You will be responsible for building and maintaining scalable, high-performance backend systems that power our products.…
Research Engineer, AI Safety & Alignment
About the role and team 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…
Machine Learning Infrastructure Engineer
About the role We’re looking for seasoned ML Infrastructure engineers with experience designing, building and maintaining training and serving infrastructure for ML research. Responsibilities : Provide infrastructure…