Work

Building the machinery behind intelligence.

9 years building consumer ML, post-training, and agent systems.

Post-training & alignmentAgentic systems & tool useEvaluation infrastructureSynthetic data pipelines3 US patents1B+ device scale

Career Trajectory

Apple

Senior ML Engineer

2024 –

Siri Core Modeling

Founding engineer on Siri's next-generation agent platform, deployed across more than one billion devices. I work on post-training, synthetic data, and model self-improvement.

ML Engineer II

2021 – 2024

Agentic Reasoning & Planning

Built LLM, synthetic-data, and evaluation systems for Apple Intelligence.

ML Engineer

2020 – 2021

CoreOS

Built on-device ML for battery health, software-update forecasting, and Always-On Display. Co-inventor on three U.S. patents.

Before That

Game Software Engineer

2019

Tencent Holdings Ltd.

Built Unity editor tools that made game designers three times faster on a game with more than two million daily players.

Research Assistant

2018 – 2019

HKU

Built sentencing-prediction models from 54 court cases. HKU's Law & Technology Center used them for public legal education.

Software Engineer

2018

J.P. Morgan

Led a six-person team building predictive monitoring for a trading desk. Cut one query from 120 seconds to 3.

Data Science Intern

2017

CLP Power Hong Kong

Forecast demand across 14 districts and built dashboards used daily by 2,400 field engineers.

Research Interests