Focused on constructing dialogue datasets and chatbot modeling based on LLMs.• Led data construction project for multi-session chat models, built 3000+ dialogue data.Contributed in all phases of project, including writing labeling guidelines, training labelers, reviewing and formatting final data.• Collaborated with prompt engineers to create seed data and applied data augmentation techniques to create a Korean-specific instruction dataset.• Developed a persona chatbot model through instruction and alignment tuning. Collaborated with the CX team to define its personality traits.• Developed and deployed AI model services using Docker, Amazon S3, and Git.