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
The position focuses on designing, developing, and operating AI-native features for DealOn. Its central technologies and approaches are retrieval-augmented generation (RAG), large language models (LLMs), and AI agents. The work extends beyond model implementation by connecting AI capabilities with user interfaces, user experience, and business workflows.
The engineer makes end-to-end technical decisions for specific use cases, including selecting models, frameworks, and external services; designing inference architecture, RAG systems, and agents; and balancing quality with development speed. Responsibilities include designing reliable agent-based LLM workflows for production and building execution infrastructure for AI agents through integration with external services and internal APIs.
The role includes discussing needs with stakeholders, translating those needs into concrete requirements, and collaborating across functions to design agent-based solutions. The engineer establishes testing frameworks and monitoring systems to evaluate agent performance and visualize key metrics. The position also involves defining development processes and quality standards through code reviews and comprehensive documentation.
The engineer identifies and addresses technical challenges affecting the accuracy, reliability, performance, and scalability of AI systems. Operational practices cover evaluation, monitoring, logging, and cost optimization so that the AI experience can be continuously improved and maintained reliably.
The product context is AI software for business domains requiring specialized expertise. LegalOn Technologies develops legal AI solutions and offers DealOn, CorporateOn, and CXOn. The company operates across Japan, the United States, and Europe and describes its AI organization as global.
The stated work location is 19F, Shibuya Sakura Stage SHIBUYA TOWER, 1-1 Sakuragaoka-cho, Shibuya-ku, Tokyo 150-6219, Japan. This is not a fully remote position; hybrid work is required. Visa support is available.
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