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
LegalOn Technologies is a global company providing 'Professional AI' — products combining domain expertise with advanced AI. Founded in 2017, it focused on legal AI (about 28.6B JPY cumulative funding, US entity in 2022, first M&A of Germany-based Fides in 2025), with flagship LegalOn in Japan/US/UK (ARR surpassing 10B JPY in Sept 2025) plus WorkOn, DealOn, and GovernOn, and a strategic partnership with OpenAI. As a Software Engineer on Design Systems you grow the cross-product design system 'Aegis' as a shared foundation, continuously improving UI quality, accessibility, and development efficiency. Full-time (seishain); Tokyo (Shibuya); full remote not available (negotiable).
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