Lead DealOn’s engineering team hands-on with AI coding agents, owning delivery, technical decisions, roadmap, team growth, and hiring support. Tokyo; full remote unavailable.
About this role
An AI Engineer role on a sales-focused AI product at a global company providing 'Professional AI' that covers key expert-business operations. Founded in 2017, the company has focused on AI-powered legal AI services, established a US entity, expanded to Japan, the US and the UK, and offers multiple AI products supporting advanced professional work and decision-making beyond legal, using cutting-edge technologies such as AI agents through a strategic partnership with a leading AI lab. The role takes responsibility for designing, developing and operating AI-native features centered on RAG, LLM and AI agents, going into UI/UX and business flows to realize genuinely usable AI experiences; leads model selection, inference configuration, RAG design and agent design per use case to balance quality and speed; and designs operations including evaluation, monitoring, logging and cost optimization. Work includes designing and implementing stable production agent LLM workflows, integrating external services and internal APIs to build the agent execution platform, evaluating and selecting external models/frameworks, clarifying user needs through requirements hearings, building test and monitoring infrastructure to evaluate agent performance, and establishing quality standards through code review and documentation. Based in Sakuragaoka, Shibuya-ku, Tokyo. Full-time.
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