Job Title: Software Engineer, Backend
Company Overview
We are a Legal AI technology company that combines deep legal expertise with advanced AI development. Since our establishment in 2017, we have focused on creating AI-powered legal technology services and have secured significant funding. We expanded globally by establishing a U.S. subsidiary in 2022. Our flagship product is an AI-driven legal platform that supports comprehensive legal operations. We also offer related platforms in the U.S. and U.K., and recently launched a generative AI solution for corporate compliance and internal rules search in 2025. Our solutions integrate cutting-edge natural language processing, large language models, legal document graph technologies, and autonomous AI agents.
Job Description
As a backend engineer, you will be responsible for developing and enhancing our legal platform products, ensuring the delivery of high-quality and stable software that consistently adds value for users.
Key Responsibilities
Develop and maintain backend systems using appropriate technologies
Plan, design, implement, test, and operate new features for web applications
Design and develop components for document processing
Build infrastructure to support schema-driven development, reuse of libraries, and continuous deployment
Integrate authentication and authorization mechanisms into applications
Architect systems to maintain high service quality
Enhance team productivity and software quality through automation, improved processes, and clear documentation
Provide mentorship and guidance to team members as needed
Technology Stack & Tools
(Full details available upon request)
Requirements
Mandatory
Over 3 years of experience in system development
Over 3 years of experience with at least one programming language
Proven track record in improving code quality and team productivity
Experience in selecting and maintaining appropriate technologies
Japanese proficiency equivalent to JLPT N1
Preferred
Experience with web development using Go or Java
Experience with cloud platforms such as AWS, GCP, or Azure
Familiarity with container technologies like Docker
Knowledge of Domain-Driven Design (DDD) or clean architecture principles
Experience with secure web application development
Experience implementing natural language processing or parsing algorithms
Skills in data collection and visualization for decision-making
Ability to write maintainable, robust, and responsibility-focused code
Salary
7.7 million to 10.7 million JPY annually, based on experience and skills
Location
Tokyo (Shibuya area)
Employment Type
Full-time
Working Conditions
Flexible working hours with no core time or discretionary labor system
Possibility of working overtime
One-hour break per day
Three-month probation period
Benefits
Over 120 annual holidays, including full weekends and national holidays
Various paid leave options including year-end, sick, work-life balance, birthday, parental, caregiving, and condolence leave
Full social insurance coverage
Language learning support
Budget for self-development
Subsidy for flu vaccinations
No smoking indoors (designated areas available)
Permission-based side jobs allowed
Certified as promoting gender equality in the workplace