As a member of our IT team, you will own a broad set of responsibilities in support of our employees and the organization-wide IT operations of Character.ai. Manage and maintain the technology our employees rely on - MacBooks, Google Workspace, employee productivity applications - and the IT infrastructure that helps us securely operate at scale. You will also need to design and implement projects that support the growth and scaling of our organization.
We’re looking for seasoned ML Infrastructure engineers with experience designing, building and maintaining training and serving infrastructure for ML research.
We are scaling personalized AI to billions of users by reimagining how people discover, engage with, and return to intelligent characters. This requires blending product craftsmanship with growth experimentation and an instinct for user behavior. We’re looking for a skilled engineer who is excited to build elegant, high-impact user experiences that drive growth. If you thrive at the intersection of design, data, and iteration—and care deeply about quality and performance—we’d love to work with you.
Joining us as a Research Engineer on the ML Systems team, you’ll be working on cutting-edge ML training and inference systems, optimizing the performance and efficiency of our GPU clusters, and developing new technologies that fine-tune leading consumer AI models with a data flywheel, and serve 20K+ QPS in production with LLMs. Your work will directly contribute to our groundbreaking advancements in AI, helping shape an era where technology is not just a tool, but a companion in our daily lives. At Character.AI, your talent, creativity, and expertise will not just be valued—they will be the catalyst for change in an AI-driven future.
We’re looking for a talented and creative Software Engineer to join our Safety Engineering team at Character.AI! In this role, you’ll work closely with Product, Design and Trust and Safety operations teams to design and build tooling and product experiences that help ensure a safe, transparent and engaging experience for our users. You’ll play a key role in shaping innovative solutions to the unique Trust & Safety challenges that come with human-to-AI interaction—bringing your technical expertise to the table as we define industry best practices in this emerging space.
Joining us as a Research Engineer on the Post-Training team, you'll be diving into the exciting world of fine-tuning AI models, optimizing their performance, and ensuring they meet the highest standards of quality and efficiency. Your work will directly contribute to our groundbreaking advancements in AI, helping shape an era where technology is not just a tool, but a companion in our daily lives. At Character.AI, your talent, creativity, and expertise will not just be valued—they will be the catalyst for change in an AI-driven future.
As a Research Engineer on our Multimodal team, you’ll be a self-motivated, resourceful contributor with full-stack machine learning expertise—from data collection and training state-of-the-art models to building evaluations, optimizing inference algorithms, and refining systems based on user feedback.