Jobs at Character.ai

Software Engineer, Monetization at Character.ai is a remote role focused on building and optimizing user-facing features for payments, subscriptions, and in-app purchases. The engineer will design and experiment with monetization surfaces, partner with design and product teams, and collaborate with data science on metrics and experiments.

Research Engineer at Character AI focused on AI safety and alignment. This role involves developing and implementing novel evaluation methodologies, researching cutting-edge techniques for model alignment, value learning, and interpretability, and conducting adversarial testing to ensure AI models behave in accordance with human values and intentions.

Technical Program Manager for Model Alignment and Deployment at Character AI. This role involves leading cross-functional programs focused on transforming language models into safe, engaging, and scalable products. Responsibilities include program ownership, cross-functional coordination, and ensuring efficient data pipelines, evaluation frameworks, and serving infrastructure.

Character.ai is seeking a Senior Machine Learning Infrastructure Engineer to design, build, and maintain training and serving infrastructure for ML research. Responsibilities include providing infrastructure support, developing diagnostic tools for cluster and hardware issues, monitoring deployments, managing experiments, and optimizing GPU allocation and utilization.

Character.ai is seeking a Software Engineer, Core Product to build the future of open-ended interactions between people and intelligent agents. This role focuses on front-end development, creating highly performant, visually appealing, and user-friendly interfaces. The engineer will collaborate with design to translate concepts into tangible experiences and maintain design systems.

Character.ai is hiring a Senior Software/ML Engineer for their Applied ML team. This role focuses on building and optimizing ML backend systems for discovery features like recommendations, ranking, and search, supporting new AI-generated content formats.

Research Engineer on the Post-Training team at Character AI, responsible for fine-tuning AI models, optimizing performance, and developing alignment algorithms. This role involves working with data pipelines, identifying quality signals, and designing sampling algorithms for large generative models.

Character.AI is seeking a Technical Program Manager to partner with their Chief Product Officer. This role focuses on ensuring seamless operation of core development engines, optimizing cross-functional roadmaps, and eliminating engineering bottlenecks. The TPM will drive accountability, evolve processes, and solve complex technical and operational problems.

Character.ai is seeking a Senior Backend Engineer to build and maintain scalable, high-performance backend systems. The role involves designing, developing, and optimizing backend services, implementing secure APIs, and ensuring system reliability and security. Collaboration with cross-functional teams is essential.

Software Engineer, Backend/Applied ML at Character.AI is a remote role focused on designing, developing, and scaling backend systems for safety and integrity. The role involves leveraging applied machine learning to tackle critical integrity and safety challenges, including content classification, anomaly detection, and safeguards for Generative AI.

Principal Research Engineer on the Post-Training team at Character.AI. This role drives the technical vision and execution of systems that transform foundation models into intelligent products, focusing on post-training top-tier OSS LLMs for role-playing chat features. Responsibilities include technical leadership, research, model development, and cross-functional collaboration.

Technical Program Manager, AI Infrastructure at Character.AI to lead programs for model development and serving systems. This role involves partnering with engineering, research, and product teams to shape infrastructure strategy, align roadmaps, and drive execution for initiatives across training, evaluation, and inference.

Character AI is seeking a Staff Data Scientist to optimize monetization systems across subscriptions, advertising, and virtual currency economies. This role involves defining success metrics, leading experimentation, and translating complex data into actionable insights to drive revenue growth while maintaining platform creativity.