Frontend Developer

Location Tokyo
Job type Permanent
Salary
Reference 50421

Overview

Founded in 2017, this legal technology company combines deep legal expertise with advanced AI development to create innovative legal tech solutions. Having raised approximately ¥17.9 billion in funding, the company expanded internationally by establishing a U.S. subsidiary in 2022. Its flagship product is an AI-powered legal platform that supports comprehensive legal operations. The company also offers an AI-driven contract review service available in the U.S. and U.K., and recently launched a corporate-focused generative AI tool designed to simplify understanding of internal regulations and corporate challenges. Leveraging technologies such as natural language processing, large language models, legal document graphs, and AI agents, the company delivers cutting-edge, sophisticated user experiences.

Role Summary

In this role, you will primarily focus on web frontend development and help enhance our platform. Depending on your interests, there may also be opportunities to contribute to backend development, infrastructure, or design tasks.

Our team operates internationally, and communication with the U.S. team often takes place via Slack or GitHub, with translation tools available to support you. If you wish, you can also take a more active role in English-language meetings according to your proficiency. While fluent spoken English is not required, candidates who are motivated to use or improve their English skills are encouraged to join us in creating a globally impactful product.

Mission and Challenges

  • Design and develop the web frontend to serve as the primary interface between the product and its users, delivering an optimal UI/UX tailored to legal domain challenges.

  • Keep abreast of industry best practices and continuously implement the most effective technical solutions for user needs.

  • Create scalable and maintainable products designed for a global audience, addressing the diverse requirements of international markets.

Responsibilities

  • Build and enhance multiple features of the platform, with a primary focus on the web frontend.

  • Boost team efficiency and product quality by implementing automation, improving observability, refining processes, and maintaining clear documentation.

  • Offer mentoring and coaching tailored to the team’s development needs.

Why Join Us

  • Participate in a wide range of activities, including developing major features, enhancing UI, and strengthening the technical foundation.

  • Work closely and collaboratively with both business and engineering teams to achieve common objectives.

  • Contribute to delivering innovative solutions that have significant social impact by transforming legal operations in Japan.

  • Acquire experience in making strategic decisions that balance growth, technical investment, and managing technical debt within a rapidly expanding organization.

Requirements

  • Proven experience in frontend development using TypeScript and contemporary frameworks or libraries.

  • Solid understanding of HTML, CSS, and JavaScript essential for web application development.

  • At least 3 years of professional experience in web system development or an equivalent background.

  • Experience collaborating in team environments using Git and platforms such as GitHub, GitLab, or Bitbucket.

  • Fulfillment of all qualities outlined in the “Ideal Candidate” profile.

  • Japanese language proficiency at JLPT N1 level or equivalent.

Preferred

  • Experience in enhancing and maintaining legacy software systems.

  • Proficient in using tools such as Coding Agents and AI assistants to improve implementation efficiency.

  • Solid understanding of web accessibility standards and software architecture principles.

  • Skilled in designing performance-optimized solutions, including request handling and algorithm efficiency.

  • Proven track record of leading large-scale frontend projects and owning their successful delivery.

  • Experience in driving continuous improvements within development teams.

  • Hands-on experience implementing rich text or WYSIWYG editors, building complex GUIs without relying on external libraries, creating micro-interactions, and developing data visualizations using Canvas or SVG.

  • Familiarity with design tools such as Figma, Adobe XD, or Sketch.

  • Strong skills in UX writing and UI design.

  • Business-level proficiency in English, with particular strength in listening comprehension.