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渋谷区, 日本
Onsite
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)