AI Engineer (NLP)

We're looking for a Senior ML/AI Engineer to own and evolve our LLM-powered user experience. You'll work directly with our technical co-founder to build, optimize, and monitor agent systems that parse workout descriptions, provide scaling recommendations, and enable conversational data retrieval - all with production-grade accuracy and speed. This is a hands-on role focused on the ML/AI engineering side: prompt engineering, model optimization, agent orchestration, and continuous improvement based on real-world usage patterns. What You’ll Do Core Responsibilities Own the workout parsing system: improve accuracy of our fine-tuned model (currently Qwen-based) that converts natural language workout descriptions into structured schemas Design and implement agent workflows for workout scaling recommendations and performance tracking Build observability workflows using Langfuse to identify and systematically address model performance issues Optimize agent response latency while maintaining ac...