Backend Engineer – LegalOn

**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:** 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. **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 have:** 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.