Education
National University of Singapore
Aug 2020 - Dec 2024
Data Science & Analytics (CS Minor)
Worked on learning to rate synthetic speech quality, published datasets on 🤗
Work Experience
brightriver.ai
July 2024 - Now
AI Engineer
- Joined as 1st employee, scaled platform from zero to production serving 30+ institutional investors across 10+ firms.
- Built document ingestion pipelines using ECS autoscaling workers and in-house omniparser.
- Developed retrieval system using ensemble of lexical search, vector similarity, and cross encoders - competitive on FiQA.
- Built agents with tool execution, code sandboxes, and subagents as tools.
- Created web research agent outperforming Perplexity's deep research API on SimpleQA.
- Implemented robust SSE streaming endpoints handling client interruptions and hangups.
NCS
Jan 2024 - June 2024
Research Engineer Intern
- Policy research for optimizing energy use in data centers, synthetic control methods on time series sensor data.
GIC
June 2023 - Dec 2023
Machine Learning Engineer Intern
- Building internal LLM SDKs, structured output pipelines and a natural language to kdb+q query service for our traders.
National University of Singapore
Aug 2022 - May 2023
Teaching Assistant
- Taught ST1131 (Introduction to Statistical Computing).
Projects
nus-nextbus-web
https://github.com/hewliyang/nus-nextbus-web
NUS Internal Shuttle Bus web client for visualizing arrival times & routes. Over 200k visits.
SvelteSvelteKitTypescriptTailwindCSSGitHub Actions
nus-sentiment
https://github.com/selangor-no-1/nus-sentiment
Semantic search & sentiment analysis for r/NUS posts. Won the NUS Hackers Coreteam's Best Roll at NUS Hack&Roll 2023.
PythonTransformersTorchPineconeStreamlit
autograd-ui
https://github.com/hewliyang/autograd-ui
Education tool for visualizing automatic differentiation during backpropgation. Built in 24H during NUS Hack&Roll 2024.
SveltexyflowTypescript