AI Research Engineer - Agents & Workflows at Upstage

Upstage, a Korean AI company building the future of enterprise AI through domain-specific language models and intelligent tools, is hiring an AI Research Engineer for Agents & Workflows at their Gwanggyo office near Seoul. The role involves reinforcement learning for LLM (math, code, general reasoning, tool use) and building scalable agentic tool use data synthesis pipelines. You will design and develop agentic flow with tool use. Upstage operates with a remote-first culture with hubs in San Jose, Seoul, and Tokyo. The company has deep expertise in LLM development, document AI, and agentic workflows. Their team of 100+ top AI researchers, engineers, and business leaders was founded in 2020.