Full Stack Assistant Manager Platform & Operation Automation Section

**Job Description:** **About Organization** The LINK Department is a diverse and technologically advanced organization within Rakuten Symphony, Inc. Our team, comprised of members from over 10 countries, values open respect and creativity. We develop "Rakuten Link," a comprehensive communication and ecosystem app for Rakuten Mobile customers. The app integrates various services, including calls, messaging, contact management, voicemail, official accounts, news, cash transfers, and point rewards, with a Desktop version that further enhances the communication experience. We are seeking a highly skilled Senior AI/Full-Stack Engineer to join our team. This role is pivotal in driving the evolution of Rakuten Link by integrating cutting-edge AI technologies and building robust, scalable applications. You will be responsible for transforming complex product challenges into high-quality AI-driven solutions, enhancing user experience, and contributing to the next generation of our communication ecosystem. **Job Duties** * **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. **Minimum 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. **Languages:** English (Overall - 3 - Advanced)