Published

MOHPER Framework Architecture (Figure 1, CIKM Paper)

Multi-Objective Model Hyperparameter Optimization for E-commerce Search

Built a multi-objective hyperparameter optimization framework for e-commerce search at Bucketplace, launching tuned parameters 5x+ on SERP and 3x+ on CPLP for CTR/CVR gains. Accepted to CIKM'25 Applied Research Track.

Figure 3: End-to-end speech scoring model architecture from InterSpeech paper

Prompt-Aware Speech Scoring System for Second Language Learners

Developed a prompt-aware automatic speech scoring system at RIIID that solves the cold-start item problem using BERT/CLIP prompt embeddings. Published at InterSpeech 2023 and deployed to SANTA Say TOEIC Speaking app.

ICASSP 2019 Duration Controllable TTS: attention alignment and PDC model architecture

Emotional Text-to-Speech and Voice Conversion Systems

Led development of duration-controllable TTS and emotional voice conversion at Humelo, producing two ICASSP publications (2019 Oral 1st author, 2020). Won Minister of Science and ICT Special Award at K-Startup 2018.

CBRNN architecture with transfer learning for polyphonic sound event detection (ICASSP 2019)

Polyphonic Sound Event Detection with Transfer Learning

Developed convolutional bidirectional LSTM with synthetic data-based transfer learning for polyphonic sound event detection at Humelo, achieving +28.4% F1 improvement. Published at ICASSP 2019 as corresponding author.