This position is closed and is no longer accepting applications.

Senior AI Engineer - Agent

LegalOn Technologies Shibuya-ku, Tokyo September 4 2025
  • 💴 ¥10.3M ~ ¥19M annually
  • 🏡
    Partially remote
  • 🌏
    Apply from abroad
    Relocate to Japan
  • 💬
    No Japanese required
    Business English
  • 🧪
    Intermediate to senior levels
    3+ years experience required

About LegalOn Technologies

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.

Key benefits

  • Collaborative, Respect-Driven Culture
  • Comfortable and Supportive Work Environment
  • Cutting-Edge Technology and Expert Colleagues

About the position

We are looking for a highly skilled and experienced AI Engineer to join our team. You will be at the forefront of designing, developing, and deploying AI agents that leverage cutting-edge AI techniques to streamline corporate business processes, with a strong focus on the legal domain. This is a unique opportunity to apply your expertise in AI and software engineering to solve complex, real-world challenges in a high-impact setting.

Responsibilities

  • Design and implement robust AI agents.
  • Integrate AI solutions with existing SaaS platforms and legal workflow systems.
  • Evaluate third-party models, frameworks, and services to determine their suitability and integration potential.
  • Collaborate with cross-functional teams to gather requirements, understand user needs, and deliver high-impact agent solutions.
  • Build tools and infrastructure to monitor, test, and evaluate AI agent performance.
  • Conduct code reviews and maintain best practices in documentation and version control.
  • Diagnose and resolve issues in AI systems to ensure accuracy, reliability, and scalability.

Requirements

  • Bachelor’s or Master’s degree in a relevant field (e.g., Computer Science, AI, Machine Learning), or comparable hands-on experience.
  • 3+ years of experience in developing agent products or similar AI applications.
  • Strong proficiency in one programming language (e.g., Python).
  • Strong understanding of reinforcement learning and modern AI methodologies.
  • Experience with AI frameworks and agent development tools (e.g., LangGraph, CrewAI, MCP).
  • Solid problem-solving skills and meticulous attention to detail.
  • Effective communication and collaboration skills in a global environment.

Nice to haves

While not specifically required, tell us if you have any of the following.

  • Ph.D. in a relevant technical field.
  • Experience with cloud platforms such as AWS, Google Cloud, or Azure.
  • Knowledge of NLP techniques, RAG systems, and prompt engineering.
  • Contributions to open-source projects or publications in AI research.
  • Experience deploying and maintaining AI models in production environments.
  • Strong communicate skills, with the ability to communicate effectively across diverse cultures in both English and Japanese.

Compensation

¥10,300,000 ~ ¥19,000,000 annually.

Hiring Process

  1. 1

    Resume Screening

  2. 2

    Casual Interview

    We offer the option to start with a casual interview, depending on your preference.

  3. 3

    Interviews/Aptitude Test

    We will conduct a technical interview, a behavioral interview, and an executive interview. The number of interviews may vary depending on the position and may change during the selection process. We use external aptitude tests, such as SPI and reference checks.

  4. 4

    Offer Meeting

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