Backend Engineer – LegalOn

LegalOn Technologies Shibuya-ku, Tokyo April 4 2026
  • 💴 ¥9M ~ ¥12M annually
  • 🏡
    Partially remote
  • 🌏
    Apply from abroad
    Relocate to Japan
  • 💬
    Fluent Japanese
    Business English
  • 🧪
    Intermediate to senior levels
    3+ years experience required
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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

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.

Responsibilities

  • Own backend development and maintenance, making thoughtful technical decisions to build stable, high-quality software that consistently delivers value to users.
  • Plan, design, implement, test, and operate new features and enhancements for our web applications
  • Design and develop document-processing components
  • Build engineering foundations that improve productivity, such as schema-driven development, shared libraries, and continuous deployment pipelines
  • Integrate the authentication/authorization platform with the web application
  • Design architecture that enables high service quality and long-term scalability
  • Improve team productivity and product quality by building automation, refining processes, and writing documentation
  • Provide mentorship, coaching, and technical guidance to other engineers as needed

Requirements

  • 3+ years of professional software development experience (or equivalent)
  • 3+ years of experience using at least one programming language in a professional setting
  • Experience improving code quality or development productivity at the team level
  • Experience selecting and introducing new technologies, along with post-adoption maintenance and operations
  • Japanese proficiency equivalent to JLPT N1 is required.
    • Please clearly indicate your Japanese proficiency level in your resume.

Nice to haves

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

  • Experience developing web applications using Go or Java
  • Experience designing or building systems using AWS, GCP, or Azure
  • Experience with container technologies such as Docke
  • Practical experience with Domain-Driven Design (DDD) or Clean Architecture
  • Experience developing systems with a strong emphasis on web security
  • Experience implementing algorithms related to natural language processing or syntactic parsing
  • Experience collecting and visualizing data to support technical decision-making
  • Ability to write maintainable code with a clear sense of responsibility boundaries and cohesion
  • Ability to write robust, fault-tolerant code with well-designed error handling

Compensation

¥9,000,000 ~ ¥12,000,000 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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ASK A QUESTION

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