💼 Experiences
- Recruit Co.,Ltd. (2024-04 - Present)
Machine Learning Engineer, worked for recommender system. - Carnot Inc (2023-04 - 2024-03)
Part-time Engineer, worked for LLM workflow application. - LINE Corp (2022-09 - 2023-04)
Part-time Resarch Engineer, worked for comuter vision projects.(post) - GHELIA INC. (2020-05 - 2022-08)
Part-time Research Engineer, worked for computer vision projects & reinforcement learning projects.
🎓 Education
- Keio University (2022-04 - 2024-03)
Master, Computer Science - Keio University (2018-04 - 2022-03)
Bachelor, Computer Science
🏆 Awards
1st Place Winner at Recsys Challenge 2025
3rd Place Winner at Meta AI Video Similarity Challenge (CVPR 2023 workshop) (link)
Best Paper Award - HAI'22 (link)
📚 Publications
- Hasegawa Rintaro, Yosuke Fukuchi, Kohei Okuoka, Michita Imai. “Advantage Mapping: Learning Operation Mapping for User-Preferred Manipulation by Extracting Scenes with Advantage Function.” Proceedings of the 10th International Conference on Human-Agent Interaction. Association for Computing Machinery, 2022. (Best paper award).
- Sawada Yuki, Rintaro Hasegawa, Yuhi Nagatsuma, Shugo Takei, Kazuhito Yonekawa, and Hiromu Auchi. “Toward Universal User Representations: Contrastive Learning with Transformers and Embedding Ensembles.” In Proceedings of the Recommender Systems Challenge 2025, pp. 51-55. 2025.
📝 Blog Post
- 【解法紹介】RecSys Challenge 2025 で優勝しました (2025.10)
- 検索&推薦の統合モデルに関する研究動向 (2024.12)
- 【インターンレポート】ドキュメント画像に対する加工検知モデルのための学習データ生成 (2023.05)