DBE-12-Software Engineer, Product Growth - LegalOn

We are a global leading company providing Professional AI — products that combine deep domain expertise with advanced AI.
Since our founding in 2017, we have focused on developing AI-powered legal technology, raising a total of approximately JPY 28.6 billion to date. In 2022, we established our U.S. entity, and in 2025, we accelerated our global expansion further through our first M&A, welcoming Germany-based Fides Technology into our group.
Our flagship product, LegalOn, is currently available in Japan, the United States, and the United Kingdom. In September 2025, just six and a half years after launch, LegalOn surpassed JPY 10 billion in ARR. Beyond legal, we are expanding into other highly specialized domains with products such as WorkOn, DealOn, and GovernOn, leveraging AI to support complex professional work.
Through our strategic partnership with OpenAI, we incorporate cutting-edge technologies such as AI agents into our product development. By delivering solutions that address a wide range of business challenges, we empower our customers to achieve better outcomes.

For more details about our company, products, and development organization:
https://legalforce-recruit.notion.site/LegalOn-Technologies-Candidate-Handbook-17d82a58637480d2836ae138e5b5ee95

Mission and Challenges

• As a Software Engineer for our global product, "LegalOn", you will build the "Legal Success Platform" to support a wide range of corporate legal operations (contracts, governance, research, internal Q&A, etc.) through new feature development and ongoing maintenance.
• You will actively engage in solving challenges that arise while shaping "LegalOn" - an unprecedented product -, going beyond technical domains to drive customer value creation.

What You’ll Do

• Evolve the "Legal Success Platform" by developing new features and continuously improving "LegalOn"
• Construct and refine development workflows centered on AI
• Identify peripheral challenges necessary for creating customer value and address issues beyond your assigned domain
• Drive continuous improvements to enhance quality, maintainability, operability, and productivity

Development Environment / Tools

Backend: Go, Python, TypeScript, Java
Frontend: TypeScript, React

For additional details, please refer to this notion page:
https://legalforce-recruit.notion.site/LegalOn-Technologies-f5ebe38a6009428ab0fb1714efd3c90a

Required Skills / Qualifications

• 5+ years of experience in web application development
• 3+ years of experience in either web frontend or backend development
• 6+ months of experience in development using AI Agents
• Experience in development premised on the operation of automated testing
• Experience in asynchronous team development using distributed platforms such as Git and GitHub
• Fluent communication skills in Japanese (both online and offline)
  • Alternatively, candidates with N2-level equivalent Japanese proficiency and fluent English communication skills (both online and offline) are also welcome

Preferred Skills / Qualifications

• Practical experience with Harness / Prompt Engineering
• Experience in building workflows centered on AI
• Experience in operating and maintaining a single product for 3+ years as a Lead Engineer or Architect
• Experience in roles specializing in infrastructure, such as Platform Engineering or SRE
• Experience in product development roles other than software engineering, such as PdM, UI Design, or EM
• Experience in developing multi-region products
• Experience in development within multinational teams