Senior AI Engineer builds, trains, deploys, and operates character AI agents at scale, managing LLM/SLM pipelines, social platform integrations, and feedback loops. Requires 5+ years in backend/ML engineering with production AI deployment experience.
Salary not listed
Remote5+ YOEML Engineering
About the role
The Work
Build and maintain the training and inference pipelines for character AI agents, including LLM/SLM orchestration and swarm-based architectures
Deploy and operate AI agents across social media platforms (Instagram, X, WhatsApp, TikTok) with consistent character behavior and personality coherence
Develop tooling for studios and creators to customize agent personality, lore, brand guidelines, and behavioral guardrails
Build and improve the feedback loops — fine-tuning, reward models, RLHF, and RLAIF — that keep agents improving over time
Architect and scale the infrastructure supporting agent deployments, including multi-modal capabilities (text, voice, video, livestreaming)
Contribute to the agentic commerce platform — enabling agents to drive transactions, recommend products, and interact with payment systems
Implement safety and content moderation systems to ensure agents behave appropriately across diverse user interactions
Collaborate with studio partners to translate creative direction into agent training parameters and behavioral specifications
Monitor agent performance, engagement metrics, and behavioral drift in production
Must Have
5+ years of backend or ML engineering experience, with hands-on work deploying AI/ML models to production
Experience with LLM fine-tuning, prompt engineering, and inference optimization
Strong proficiency in Python; experience with Golang is a plus
Experience building and operating API services and data pipelines at scale
Familiarity with reinforcement learning techniques (RLHF, reward modeling) or agent framework development
Understanding of multi-model architectures — orchestrating multiple models or agents to collaborate on tasks
Experience deploying applications that integrate with third-party platforms and APIs (social media, messaging, commerce)
Strong systems thinking — comfortable reasoning about distributed systems, scaling, and reliability
Exceptional problem-solving and communication skills
Nice to Have
Experience with character AI, conversational AI, or NPC behavior systems
Background in gaming, entertainment, or media technology
Experience with multi-modal AI (voice, image, video generation or processing)
Familiarity with blockchain infrastructure, on-chain payments, or crypto-native commerce
Experience with MCP (Model Context Protocol) or agent-to-agent communication protocols
Understanding of content safety, trust & safety systems, or responsible AI practices
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