TECH-S-101/EN- Senior Software Engineer - Search, AI

We are a global legal AI company with advanced technological capabilities in AI and specialized knowledge in law and contracts. Since our founding in 2017, we have focused on developing legal AI services powered by artificial intelligence, raising a total of approximately ¥28.6 billion in funding, establishing a group company in the United States in 2022 to accelerate our global expansion, and continuing to grow at a remarkable pace. Currently, we offer our flagship product, "LegalOn: World Leading Legal AI," which has been released not only in Japan but also in the United States and United Kingdom. We are also boldly expanding into multiple new business areas, and in January 2025, we extended our business domain to cover all corporate functions with the release of AI Counsel "CorporateOn." Our products feature AI-powered capabilities including machine learning algorithms in natural language processing, large language models (LLMs), as well as our "Legal Document Graph" that systematically organizes accumulated information, and AI agents that autonomously plan and execute tasks. Furthermore, we have begun a strategic partnership with OpenAI, Inc., and as a leader in legal AI, we will continue to deliver advanced user experiences and sophisticated solutions. For more details about our company, products, and development organization: https://legalforce-recruit.notion.site/LegalOn-Technologies-3e114a8aecfb410a96424e34a0ed8bd6 【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. LegalOn Technologies is a leading company of LegalTech 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

- 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)

- 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