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Senior Software Engineer - Search, AI

LegalOn Technologies, Inc.

Job Summary

LegalOn Technologies is a global leader in legal AI solutions, trusted by more than 7,500 companies and law firms worldwide. The company empowers legal teams to review and negotiate contracts faster, with greater accuracy and confidence. Operating across Japan, the United States, and Europe, LegalOn is the first AI company from Japan to surpass ¥10 billion in annual recurring revenue (ARR) and has raised over $200M from leading investors including SoftBank and Goldman Sachs. It also has one of the largest and most global AI teams of any startups in Japan. In 2025, LegalOn achieved its first M&A by welcoming Germany's Fides Technology into the group, further accelerating global expansion. LegalOn combines LLMs, intelligent Agents and intelligent AI-driven workflows. Beyond legal, the company now offers specialized AI solutions including "CorporateOn," "CXOn," and "DealOn" to support diverse business domains requiring high expertise. In partnership with OpenAI, the company is redefining the legal AI landscape and developing innovative solutions for the future of professional work. For more details about our company, products, and development organization: https://legalforce-recruit.notion.site/LegalOn-Technologies-Candidate-Handbook-17d82a58637480d2836ae138e5b5ee95 【Key Responsibilities】 The Search and Recommendation group at LegalOn Technologies is responsible for a wide range of search, recommendation and agentic features in multiple rapid-growth services. We are a leading company of LegalAI in Japan, and Search and Recommendation is one of the most essential and mission-critical systems for our services. We are looking for a skilled Senior Software Engineer passionate about technology to design and implement various search/recommendation features and solve complex challenges to provide the best search experience to our customers. ■ What Mission and Challenges You’ll Take On - Collaborate with product managers to explore what exciting features we would deliver to our customers, make a practical plan about ho

Company Info

LegalOn Technologies is a global legal AI company that combines advanced expertise in artificial intelligence with deep knowledge of law and contracts. Founded in 2017, the company focuses on building AI-powered legal services to help legal and business teams work faster and more confidently. They develop AI-powered solutions that support contract review, drafting, and risk analysis at scale. The company's technology is built on proprietary infrastructure, including large language models (LLMs), a Legal Document Graph, and autonomous legal AI agents, designed to structure complex legal content and power real legal workflows.

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