Final-year Computer Science student at the National University of Singapore (NUS).
Focused on backend engineering and AI systems.

• CoreFlint – AI procurement automation (RFQs/POs → ERP).
  Python, FastAPI, LLMs
  → Automated line-item extraction with human-in-the-loop review; improved accuracy and reduced manual entry effort.

• SQL Mutation Testing for NL-to-SQL Benchmarks – Final Year Research Project, supervised by Prof. Manuel Rigger.
  Python, PostgreSQL, SQLite, LLMs
  → Building mutation testing framework for NL-to-SQL benchmarks; highlights insufficiency of execution-only equivalence checks.

• Languages & Databases: Python, JavaScript, Java, SQL (PostgreSQL/MySQL), MongoDB, Redis
• Backend: FastAPI, REST APIs
• AI/ML: LLMs, multimodal pipelines, retrieval-augmented generation
• Infra & Tools: AWS (EC2, S3, SageMaker), Docker, CI/CD, GitHub Actions, PyTest

Feel free to reach out for collaboration or opportunities:
tohpinren@gmail.com · LinkedIn · Website