Intelligent Conversation System for Multilingual Financial Industry
Yewei Song. "Intelligent Conversation System for Multilingual Financial Industry." PhD thesis, University of Luxembourg. 2026.
CV
Education
- Ph.D in Computer Science, University of Luxembourg, Jun-2026
- Thesis: Intelligent Conversation System for Multilingual Financial Industry
- M.Sc. Advanced Computer Science, The University of Birmingham, Nov-2020
- B.Eng. in Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, June-2016
- Visiting PhD, University of Tokyo, Jan-2026
Work experience
- 2026 - present: Postdoctoral Researcher
- University of Luxembourg
- Research on Large Language Models, Software Engineering and Natural Language Processing.
- 2016 - 2017: Assistant Software Engineer
- China Union Pay
- Duties includes: Automated test and Payment system.
- 2017 - 2019: Senior Software Engineer
- USTC iFlytek
- Duties included: NLP platform, DevOps and data processing system design.
Skills
- Machine Learning Tools
- Programming Languages
- Python
- Java
- C++
- JavaScript
- Languages
- English
- Mandarin Chinese
- Japanese
- Luxembourgish
Publications
Do Large Language Models Grasp The Grammar? Evidence from Grammar-Book-Guided Probing in Luxembourgish
L. Li, Yewei Song, L. Sleem, Y. Wang, Y. Xu, Cedric Lothritz, N. Gentile, R. State, et al. "Do Large Language Models Grasp The Grammar? Evidence from Grammar-Book-Guided Probing in Luxembourgish." In Proceedings of the Fifteenth Language Resources and Evaluation Conference. 2026.
Empirical Evaluation of PDF Parsing and Chunking for Financial Question Answering with RAG
O. El Bachyr, Yewei Song, Saad Ezzini, Jacques Klein, Tegawendé F. Bissyandé, A. Zilali, Ulrick Ble, et al. "Empirical Evaluation of PDF Parsing and Chunking for Financial Question Answering with RAG." In Proceedings of the IEEE/ACM 48th International Conference on Software Engineering. 2026.
Correctness isn’t Efficiency: Runtime Memory Divergence in LLM-Generated Code
P. K. Rajput, Yewei Song, A. A. Bonkoungou, I. E. Olatunji, A. K. Kabore, Jacques Klein, et al. "Correctness isn't Efficiency: Runtime Memory Divergence in LLM-Generated Code." In Proceedings of the IEEE/ACM 48th International Conference on Software Engineering. 2026.
Are Small Language Models the Silver Bullet to Low-Resource Languages Machine Translation?
Yewei Song, L. Li, Cedric Lothritz, Saad Ezzini, L. Sleem, Tegawendé F. Bissyandé, and Jacques Klein. "Are Small Language Models the Silver Bullet to Low-Resource Languages Machine Translation?" In Proceedings of the Ninth Workshop on Technologies for Machine Translation of Low-Resource Languages. 2026.
Measuring LLM Code Generation Stability via Structural Entropy
Yewei Song, Tiezhu Sun, Xunzhu Tang, P. K. Rajput, Tegawendé F. Bissyandé, and Jacques Klein. "Measuring LLM code generation stability via structural entropy." In 2025 40th IEEE/ACM International Conference on Automated Software Engineering (ASE). 2025.
RAML: Toward Retrieval-Augmented Localization of Malicious Payloads in Android Apps
Tiezhu Sun, M. Alecci, Yewei Song, Xunzhu Tang, Kisub Kim, J. Samhi, Tegawendé F. Bissyandé, and Jacques Klein. "RAML: Toward Retrieval-Augmented Localization of Malicious Payloads in Android Apps." In 2025 40th IEEE/ACM International Conference on Automated Software Engineering (ASE). 2025.
ExpertCache: GPU-Efficient MoE Inference through Reinforcement Learning-Guided Expert Selection
Xunzhu Tang, Tiezhu Sun, Yewei Song, Siyuan Ma, Jacques Klein, and Tegawendé F. Bissyandé. "ExpertCache: GPU-Efficient MoE Inference through Reinforcement Learning-Guided Expert Selection." In The 41st International Conference on Software Maintenance and Evolution (ICSME). 2025.
MalLoc: Toward Fine-grained Android Malicious Payload Localization via LLMs
Tiezhu Sun, M. Alecci, A. Pilgun, Yewei Song, Xunzhu Tang, J. Samhi, Tegawendé F. Bissyandé, and Jacques Klein. "MalLoc: Toward Fine-grained Android Malicious Payload Localization via LLMs." In 2025 IEEE International Conference on Software Maintenance and Evolution (ICSME). 2025.
Just-in-time detection of silent security patches.
Tang, Xunzhu, Kisub Kim, Saad Ezzini, Yewei Song, Haoye Tian, Jacques Klein, and Tegawende Bissyande. "Just-in-time detection of silent security patches." ACM Transactions on Software Engineering and Methodology 35, no. 6 (2026): 1-34.
SynFix: Dependency-Aware Program Repair via RelationGraph Analysis
Xunzhu Tang, J. Gao, J. Xu, Tiezhu Sun, Yewei Song, Saad Ezzini, Wendkuuni C. Ouedraogo, Jacques Klein, et al. "SynFix: Dependency-aware program repair via RelationGraph analysis." In Findings of the Association for Computational Linguistics: ACL 2025, pp. 4878-4894. 2025.
CallNavi, A Challenge and Empirical Study on LLM Function Calling and Routing
Yewei Song, Xunzhu Tang, Cedric Lothritz, Saad Ezzini, Jacques Klein, Tegawendé Bissyande, Andrey Boytsov, Ulrick Ble, and Anne Goujon. 2025. CallNavi, A challenge and empirical study on LLM function calling and routing. In Evaluation and Assessment in Software Engineering (EASE ’25), June 17–20, 2025, Istanbul, Turkiye. ACM, New York, NY, USA, 12 pages. https://doi.org/10.1145/3756681.3756975
You Don’t Have to Say Where to Edit! jLED–Joint Learning to Localize and Edit Source Code
Weiguo Pian, Yinghua Li, Haoye Tian, Tiezhu Sun, Yewei Song, Xunzhu Tang, Andrew Habib, Jacques Klein, and Tegawendé F. Bissyandé. 2025. You Don’t Have to Say Where to Edit! jLED—Joint Learning to Localize and Edit Source Code. ACM Trans. Softw. Eng. Methodol. 34, 6, Article 164 (July 2025), 27 pages. https://doi.org/10.1145/3712187
CodeAgent: Autonomous Communicative Agents for Code Review
Tang, Xunzhu, Kisub Kim, Yewei Song, Cedric Lothritz, Bei Li, Saad Ezzini, Haoye Tian, Jacques Klein, and Tegawendé Bissyandé. "CodeAgent: Autonomous Communicative Agents for Code Review." In Proceedings of the 2024 Conference on Empirical Methods in Natural Language Processing, pp. 11279-11313. 2024.
LLMs and Prompting for Unit Test Generation: A Large-Scale Evaluation
Ouedraogo, Wendkuuni C., Kader Kabore, Haoye Tian, Yewei Song, Anil Koyuncu, Jacques Klein, David Lo, and Tegawende F. Bissyande. "Llms and prompting for unit test generation: A large-scale evaluation." In Proceedings of the 39th IEEE/ACM International Conference on Automated Software Engineering, pp. 2464-2465. 2024.
Revisiting Code Similarity Evaluation with Abstract Syntax Tree Edit Distance
Song, Yewei, et al. "Revisiting Code Similarity Evaluation with Abstract Syntax Tree Edit Distance." Proceedings of the 62nd Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers). 2024.
Enhancing Text-to-SQL Translation for Financial System Design
Song, Yewei, Saad Ezzini, Xunzhu Tang, Cedric Lothritz, Jacques Klein, Tegawendé Bissyandé, Andrey Boytsov, Ulrick Ble, and Anne Goujon. "Enhancing text-to-sql translation for financial system design." In Proceedings of the 46th International Conference on Software Engineering: Software Engineering in Practice, pp. 252-262. 2024.
Semantic Patch Embedding for Security Detection: A Fine-to-Coarse Grained Approach
Xunzhu Tang, Yewei Song, Haoye Tian, Z. Chen, Jacques Klein, and Tegawendé F. Bissyandé. "Semantic Patch Embedding for Security Detection: A Fine-to-Coarse Grained Approach." In The Second Tiny Papers Track at ICLR 2024. 2024.
Letz Translate: Low-Resource Machine Translation for Luxembourgish
Yewei Song, Saad Ezzini, Jacques Klein, Tegawendé Bissyandé, C. Lefebvre, and Anne Goujon. "Letz Translate: Low-Resource Machine Translation for Luxembourgish." In 2023 5th International Conference on Natural Language Processing (ICNLP). 2023.
Teaching
Service and leadership
- ACL ARR Reviewer
- ACM Transactions on Software Engineering and Methodology (TOSEM) Reviewer