株式会社LegalOn Technologiesの
TECH-S-101/EN- Senior Software Engineer - Search, AIの求人

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募集概要

LegalOn Technologies is a global leader in legal AI solutions, trusted by more than 7,000 companies and law firms worldwide. Our software empowers legal teams to review and negotiate contracts faster, with greater accuracy and confidence. Operating across Japan and the United States, we are backed by leading investors with over $180M raised. We bring together large language models (LLMs), a proprietary Legal Document Graph that organizes complex legal information, and intelligent AI-driven workflows. In partnership with OpenAI, we are redefining the legal AI space and delivering innovative solutions for the future of legal 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 how the work should be done, and take responsibility for the delivery. - Mentor team members to help design software systems in sustainable/maintainable ways. ■ What You’ll Do - Design, build, and deliver a wide range of search, recommendation, and Agent features/APIs. - Identify performance and accuracy bottlenecks in LLM-powered applications and improve them, as well as implement functional extensions such as integration with search/recommendation features. - Proactively maintain and operate search and recommendation features/APIs. - Collaborate with team members and other teams to investigate performance and accuracy issues in search, recommendation, and Agent systems in production environments, establish quantitative evaluation metrics, and drive improvements. ■ Mindset - Proactively identify team and product challenges, take autonomous action toward solutions, and see them through to completion with full accountability - Share expertise generously to help maximize the overall output of the team - Collaborate effectively within and beyond the team, leading constructive discussions and sound decisions

必須スキル

- BS degree in Computer Science, Mathematics, or other technology-related majors. - 5+ years experience in search and software engineering. - Basic knowledge of data structures and algorithms. - Hands-on expertise in building highly reliable and performant web backend systems. - Hands-on experience with one of the Cloud Infrastructure Services: AWS, GCP, or Azure - Ability to communicate in Japanese on a daily basis (JLPT N2 or compatible experience)

歓迎スキル

- MS or Ph.D. degrees in Computer Science, Mathematics, or other technology-related majors. - Hands-on experience in Apache Lucene, Elasticsearch, or Solr. - Hands-on experience in developing Agent applications and related component technologies such as LangChain, Ragas, LlamaIndex, etc. - Hands-on experience in Python or Java. - Hands-on experience in machine learning and natural language processing. - Experience mentoring/training junior engineers. - Leadership experience in large-scale projects or teams (10+ members) with a proven track record of delivering results - A proactive attitude towards learning and adopting new technologies, including AI-powered efficient development and task execution - Strong communication skills, with the ability to work effectively across diverse cultures in both English and Japanese

求める人物像

応募概要

給与: 10.3million to 19million yen per year
勤務地: 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, and visa support is available.
雇用形態: Full-time
勤務体系: - Working hours: Full flex system without core hours - Overtime work beyond designated working hours: Yes - Break time: 1 hour
試用期間: 3 months
福利厚生: Work Environment & Tools - Choice of laptop: Mac or Windows (Mac with US keyboard available) - Access to generative AI tools: ChatGPT Enterprise, Notion AI, Gemini for Google Workspace, Slack AI - Access to developer tools: Claude Code, Cursor Business, GitHub Copilot Business, JetBrains, and more - Side jobs permitted with prior approval Professional Development - Self-development support available for books, online courses, certifications, and more - Language learning support Time Off - Weekends and national holidays off - Paid leave and year-end/New Year holidays - Special leave: sick leave, work-life balance leave, birthday leave - Maternity leave, childcare leave, and nursing care leave Health & Welfare - Social insurance coverage: Health insurance, employee pension insurance, unemployment insurance, and worker’s compensation insurance - Influenza vaccination support - No indoor smoking (a designated smoking room is available in the building) - Employee stock ownership program