Character AI

Software Engineer on the AI Platform team at Character.AI, focusing on building tooling and datasets for model training, developing data pipelines for continuous model improvement and human feedback alignment, and supporting data infrastructure (Spark, Beam, GCP). Requires 5+ years of data engineering experience in a consumer-facing tech company, with Big Query, dbt, Ray, Beam, and Spark.

Machine Learning Infrastructure Engineer to design, build, and maintain training and serving infrastructure for ML research, focusing on GPU allocation and utilization, cluster issue diagnosis, and deployment monitoring.

Technical Program Manager for AI Infrastructure at Character.AI, focusing on leading programs for model development and serving systems at scale. This role involves shaping infrastructure strategy, aligning roadmaps, and driving execution across training, evaluation, and inference, ensuring systems are reliable, efficient, and scalable for millions of users. The TPM will partner with engineering, research, and product teams, manage complex initiatives, track key metrics, and improve developer velocity.

Software Engineer, Backend/Applied ML (Safety & Integrity) at Character.AI. Focuses on designing, developing, and scaling backend systems and applying ML to address integrity and safety challenges in human-to-AI interaction, particularly for Generative AI products. Involves content classification, anomaly detection, risk scoring, and developing safeguards.

Software/ML Engineer to build and optimize applied ML models and infrastructure for Character.AI's consumer-facing discovery surfaces (recommendation, ranking, search), including data pipelines, model training, and serving. Focus on shipping intelligent features end-to-end.