Full Stack Assistant Manager

Job Description

Appealing Points:

• Opportunity to work on cutting-edge AI/LLM technologies, designing and building scalable AI agents and automation solutions
• Gain full-stack development exposure, from backend APIs to frontend interfaces and automation pipelines
• Enhance both technical expertise and leadership skills through collaboration, code reviews, and mentoring in an agile environment

Annual salary : 8 Million yen and above

Job Responsibilities:

• AI Agent Development: Design, develop, and maintain scalable AI agents for workflow automation. Implement agent logic, including prompt design, tool usage, and response handling, while ensuring reliability and performance.
• Full-Stack Integration: Integrate LLMs into applications using Python, JavaScript, TypeScript, or Java. Build backend services, APIs, and automation pipelines. Craft intuitive, responsive user interfaces using modern frameworks (e.g., React, Remix, Angular, Vue.js).
• Testing & Quality Assurance: Test AI outputs for accuracy, consistency, and edge cases. Debug AI workflows, resolve integration issues, and continuously improve system quality through feedback loops.
• Cross-functional Collaboration: Partner with product managers, designers, QA, and DevOps teams to gather requirements, ensure alignment, and deliver high-impact features.
• Code Excellence & Mentorship: Write clean, efficient, and reusable code. Conduct thorough code reviews and provide mentorship to junior engineers to foster a culture of continuous learning.
• Innovation & Security: Stay abreast of the latest AI/LLM trends and proactively apply them. Implement robust security measures to ensure data protection and industry compliance.

Job Qualifications:

• Education: Bachelor’s degree in Computer Science, Engineering, AI, ML, or a related field (or equivalent work experience).
• Experience: 7+ years of progressive experience in programming (Python, Java, Kotlin, or Node.js) with a strong background in designing/maintaining REST APIs and microservices.
• Frontend Proficiency: Strong command of HTML, CSS, and modern JavaScript (ES6+). Experience with frameworks like React (Remix), Angular, or Vue.js, and state management libraries (e.g., Redux, MobX).
• AI/LLM Expertise: Proven experience designing and implementing scalable AI agents and automation platforms using LLMs. Solid understanding of ML, Deep Learning, and NLP fundamentals (TensorFlow, PyTorch, JAX, or Keras).
• Technical Foundations: Deep understanding of full-stack software development principles, design patterns, data structures, and algorithms.
• Soft Skills: Excellent analytical and problem-solving skills, with the ability to articulate complex technical concepts to both technical and non-technical stakeholders.
• Methodology: Experience working within Agile development environments.

Language: Conversational-level Japanese (JLPT N5) and Business-level English

Company Description:

We are a technology-led software services company that fulfils technology companies' software product development needs worldwide. As a trusted partner of today’s enterprises, we build software solutions for the future. We aim to understand our customers' needs and aspirations to deliver software that aligns with their vision. We are passionate about creating future-ready software focusing on superior user experience and ultimate simplicity.

Specializing in mobile, web, and cloud-based software development services across various industry verticals, we cater to customers globally. We focus on developing next-generation software products that require a deep understanding of communication networks, operating system internals, device diversity, and critical system resources. Our core strength lies in combining these engineering environments to create cutting-edge software solutions.