Nine years, research to production

Physical AI Engineer · Seoul, KR

• Building the AI agent harness for the humanoid robot brain — orchestrating tool-use across perception, planning, and control, and serving trained VLM policies in the loop.
• Optimized CPU/GPU allocation and latency across the robot's compute stack, deciding workload placement (on-device vs. server) under real-time constraints.

Software Engineer · Seoul, KR

• Developed and operated high-frequency trading strategies on Polymarket — real-time ingestion, signal pipeline, and low-latency execution with microsecond-scale event handling.
• Built an AI agent that analyzes on-chain wallet transactions to surface alpha signals directly from public blockchain state.

Deep Learning Engineer · Remote · Palo Alto, CA

• Designed a hybrid web extraction system pairing LLM content reasoning with deterministic DOM parsing — page structure constrains and verifies the model's output, with DOM optimization delivering a 10× speedup.
• Designed web macro automation that generalizes one user recording into many varied replays, so a single demonstration covers a whole class of pages.

Head of Machine Learning · Seoul, KR

• Led ML at a medical-AI startup; replaced black-box predictors with provably optimal decision trees for ventilator weaning — an interpretable form clinicians could audit before trusting a recommendation.
• Reformulated the optimal-decision-tree problem to make industry-scale instances tractable, cutting training time from years to hours via multi-threaded C++ and CUDA.

Software Engineer · Seoul, KR

• Built the core token-exchange path-finding engine of Eisen's DEX aggregator — the company's flagship technology, retained through the acquisition — returning near-optimal routes across hundreds of contracts in sub-100ms.
• Engineered routing and gas-fee strategies robust to MEV bots, sandwich attackers, and mempool front-runners.

Research Intern · Seoul, KR

• Implemented a memory-augmented neural network for visual anomaly detection on Cognex's machine-vision pipeline.