株式会社LegalOn Technologiesの

TECH-110/EN Software Engineer, Backend - AI Agentの求人

募集概要

We are a global legal AI company with advanced technological capabilities in AI and specialized knowledge in law and contracts. Since our founding in 2017, we have focused on developing legal AI services powered by artificial intelligence, raising a total of approximately ¥28.6 billion in funding, establishing a group company in the United States in 2022 to accelerate our global expansion, and continuing to grow at a remarkable pace. Currently, we offer our flagship product, "LegalOn: World Leading Legal AI," which has been released not only in Japan but also in the United States and United Kingdom. We are also boldly expanding into multiple new business areas, and in January 2025, we extended our business domain to cover all corporate functions with the release of AI Counsel "CorporateOn." Our products feature AI-powered capabilities including machine learning algorithms in natural language processing, large language models (LLMs), as well as our "Legal Document Graph" that systematically organizes accumulated information, and AI agents that autonomously plan and execute tasks. Furthermore, we have begun a strategic partnership with OpenAI, Inc., and as a leader in legal AI, we will continue to deliver advanced user experiences and sophisticated solutions. For more details about our company, products, and development organization: https://legalforce-recruit.notion.site/LegalOn-Technologies-3e114a8aecfb410a96424e34a0ed8bd6 We are currently building a new product from the ground up that centers around AI Agents, delivering a radically new user experience. AI Agents are intelligent tools that understand users' natural language, create plans, and autonomously execute tasks to completion on their behalf. This product is being built from scratch, and the backend plays a critical role in orchestrating LLMs, tools(MCP), custom workflows, agent's long/short term memory, and user data with reliability and flexibility. To succeed, we need backend engineers who are not only technically strong but also product-minded and eager to tackle ambitious challenges alongside a cross-functional team. If you’re excited about shaping the backend of intelligent, task-completing agents - while balancing speed, scale, and safety - we’d love to hear from you. 【Key Responsibilities】 You will take ownership of designing and developing the backend architecture for our AI Agent product. This includes implementing APIs that interface with agent engine, managing session storage, message queues, database and other backend components, ensuring robustness of task execution, and designing data models that reflect real-world agent behavior.As an early team member, you'll also be deeply involved in architecture design, technology selection, and team culture. This is not a “build to spec” role—you’ll collaborate closely with designers, product managers, and AI engineers to iterate quickly and deliver user-impactful features. ■What Mission and Challenges you’ll take on - Designing and developing core features to realize AI agents that can complete real-world tasks—not just engage in conversation - Designing and building a backend foundation from scratch, free from existing constraints and with a clear vision for the product’s future ■What You’ll Do - Design and develop backend systems for a new AI Agent product from the ground up - Build APIs, task orchestration systems, and data models that support dynamic, goal-driven agent behavior - Integrate external tools and internal components (LLMs, workflow engines, etc.) - Ensure reliability, observability, performance, and scalability in production environments - Contribute to automation, testing, documentation, and engineering process improvement - Mentor junior engineers and contribute to team growth ■What Makes This Job Rewarding - Collaborate as equals with product managers and business stakeholders as part of a unified team - Gain valuable decision-making experience in a fast-growing company where you will be trusted with significant ownership and influence over business, technical, and process direction 【Development Environment / Tools】 Backend：Python, Go ▼We have compiled information about development environments and tools for our other products on Notion. https://legalforce-recruit.notion.site/LegalOn-Technologies-f5ebe38a6009428ab0fb1714efd3c90a