Software Engineer - Search, AI

**About the company:** LegalOn Technologies Shibuya-ku, Tokyo LegalOn Technologies is a global legal AI company that combines advanced expertise in artificial intelligence with deep knowledge of law and contracts. Since our founding in 2017, we’ve been focused on building AI-powered legal services that help legal and business teams work faster and more confidently. **Responsibilities:** Collaborate with product managers to explore what exciting features we would deliver to our customers. Break down large tasks into smaller ones and deliver new functionalities or improvements, following the development plan/design the Tech Lead or Project Leader makes. You will also be a project leader for smaller or sub-projects, making a practical development plan and taking responsibility for the delivery. 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. Requirements 3+ years experience in search and software engineering. Basic knowledge of data structures and algorithms. Hands-on expertise in building 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) Nice to haves While not specifically required, tell us if you have any of the following. 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. Hands-on experience in machine learning and natural language processing. Experience mentoring/training junior engineers. 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 Compensation ¥7,700,000 ~ ¥10,700,000 annually. **Requirements:** 3+ years experience in search and software engineering. Basic knowledge of data structures and algorithms. Hands-on expertise in building 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) **Nice to have:** While not specifically required, tell us if you have any of the following. 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. Hands-on experience in machine learning and natural language processing. Experience mentoring/training junior engineers. 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 **Compensation:** ¥7,700,000 ~ ¥10,700,000 annually.