Yongjae Yoo Ph.D.
Electrical & Computer Engineering,
Seoul National University
Samsung Electronics
MX (Mobile eXperience) Business
Communication Processor R&D Team
Staff Engineer (과장) / System Development
Mar. 2025 – Present
- Home: https://lowbyyj.github.io
- Email: yooyongjae@gmail.com
Current Role
AX Nexus TF · AI Transformation Task Force
Applied AI Engineering
Engineering Issue Triage
- Automated issue routing & assignment
- Log-assisted preliminary diagnosis
- Task-specific evaluation & failure analysis
Engineering Knowledge Agent
- RAG indexing, metadata & document curation
- Feedback-driven Source of Truth (SoT) pages
- SoT-first retrieval with document fallback
Intelligent Connectivity Development
- Bluetooth Channel Sounding
- Wi-Fi CSI data analysis
- AI Home Device
details withheld due to company policy
Research & Engineering Interests
- Applied AI Systems: agents, tool integration, workflow automation
- Retrieval & Knowledge Engineering: RAG, knowledge curation, feedback-driven improvement
- Human–AI Collaboration: voice interfaces, AI-assisted development, evaluation
- Physical Systems & Prototyping: robotics, embedded systems, hardware–software integration
- Wireless & IoT Systems: sensing, localization, security, network performance
- Experimental Platforms: automated measurement, aerial connectivity, real-world validation
Recent Research & Development
AI Agents & Harness Engineering
Context engineering, long-term memory, user preferences and interaction history, tool integration, browser/computer use, automated sign-in, note-taking and memory retrieval, greenfield/brownfield development, cross-session handoffs, context continuity, locale-aware UI automation, failure recovery, AI-assisted publishing workflows
Personal AI Tools & Interactive Systems
AI-assisted application development, cross-platform voice interfaces (Personal Voice Keyboard), game simulation, state management, reproducible testing, iterative playtesting
Drone Networks
On-the-air network measurements, real-world experiments, custom Android application, reinforcement learning, maintaining connectivity, mmWave communication, beam selection, polarization alignment, commercial base station analysis
Local AI Platforms & Memory Architectures
Local inference platforms, discrete & unified memory, capacity/bandwidth trade-offs, quantization, HBM / DDR / GDDR / LPDDR
Education
Seoul National University, Seoul, Republic of Korea Ph.D. in Electrical and Computer Engineering, Feb. 2025
- Thesis: System Design and Analysis for Communication in Aerial Networks
Seoul National University, Seoul, Republic of Korea B.S. in Department of Electrical and Computer Engineering, Feb. 2019
Experience
Exchange Student at The University of Tokyo, Tokyo, Japan Department of Information and Communication Engineering Sep. 2017 – Mar. 2018
- Language Ability: JLPT N1 (Japanese Language Proficiency Test, Highest level certified)
- Coursework: Artificial Intelligence (Prof. Hitoshi Iba), Human Interface (Prof. Takeshi Naemura)
Military Service in Korean Army Technical Research Personnel Mar. 2022 – Feb. 2025
Leadership / Teaching
Samsung Electronics
- Internal technical seminars on AI workflows and engineering tools
Ubiquitous Network Laboratory (SNU)
- Lab Captain, Jan. 2023 – Dec. 2023
- Application Team Leader Jan. 2023 – Dec. 2023
- Intern training, Jul. 2022 – Aug. 2022
- Intern training, Jul. 2024 – Feb. 2025
Department of Electrical and Computer Engineering, SNU
- 400.420 Engineering Research Practice 2, Wi-Fi signal CSI analysis and machine learning application, Spring 2020
- 400.420 Engineering Research Practice 2, Spatial information analysis using Wi-Fi CSI data, Fall 2020
- 430.405 Design Project for Electrical Devices & Systems, Wi-Fi CSI Analysis Study for People Counting with Obstacles in Disaster Sites, Spring 2022
Research Project
Agreement Manager, Development of 6G Framework Guaranteeing Application Performance — supported by IITP (Korea), high-level application–network programmable interface technology development; April 2024 – December 2024
Center Officer, Research on Ultra Reliable Aerial Network framework Supporting High-density Urban Air Mobility — supported by MSIT (Korea) under the ITRC program, supervised by IITP; Jul. 2021 – Mar. 2023
Participating Researcher, Research on Wireless PHY/MAC-based Secure Human/Region Differentiation — supported by Samsung Research; 2019 – 2020
Selected Recent Publications
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Yongjae Yoo, Seungmin Choi, Jeongyeup Paek, and Saewoong Bahk, Polarization Alignment for Cellular-based Mobile Aerial Communication, IEEE Transactions on Vehicular Technology, 2026 (accepted for publication).
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Yongjae Yoo, Jihwan Suh, Dongrak Choi, Jeongyeup Paek, and Saewoong Bahk, ASCEND: Altitude Selection for High-quality Cellular Connectivity on Drones, IEEE Transactions on Vehicular Technology, Aug. 2025.
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Yongjae Yoo, Jihwan Suh, Jeongyeup Paek, and Saewoong Bahk, Secure Region Detection using Wi-Fi CSI and One-Class Classification, IEEE Access, Vol. 9, pp. 65906–65913, Apr. 2021.
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Yongjae Yoo, Jihwan Suh, Yonghun Lee, Seongjoon Kang, Byungjun Kim, and Saewoong Bahk, Privacy-preserving People Counting with Channel State Information, ICTC (International Conference on Information and Communication Technology Convergence), Oct. 2020.
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Dokyun Ryoo, Yongjae Yoo, Jeongyeup Paek, and Saewoong Bahk, NOVA: Navigation Optimization via UWB-Assisted Iterative Path Planning for UAV Delivery, IEEE INFOCOM 2026, Tokyo, Japan, May 18-21, 2026.
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Jeongyoon Heo, Yongjae Yoo, Jihwan Suh, Woojin Park, Jeongyeup Paek, and Saewoong Bahk, FMS-AMS: Secure Proximity-based Authentication for Wireless Access in Internet of Things, Journal of Communications and Networks (JCN), Vol. 22(4), pp. 338–347, Aug. 2020.
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Jihwan Suh, Yongjae Yoo, Jeongyeup Paek, and Saewoong Bahk, Deep-Fading Hole Avoidance for Secure Region Detection using Channel State Information, JCN, Vol. 24(6), pp. 645–654, Dec. 2022.
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Dokyun Ryoo, Yongjae Yoo, Jeongyeup Paek, and Saewoong Bahk, SPADE: Secure Periodic Advertising using Coded Time-Channel Rendezvous for BLE Audio, DCOSS-IoT, Best paper runner-up, Coral Bay, Pafos, Cyprus, Jun. 19–21, 2023.
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Dongrak Choi, Yongjae Yoo, Yubin Choi, Jeongyeup Paek, and Saewoong Bahk, Escaping from the Shadow: Bottleneck-Aware UAV Placement for High-Throughput Relaying, IEEE VTC2026-Spring, Nice, France, Jun. 9-12, 2026 (accepted for presentation).
Certifications & Licenses
Pilot of an Ultra Light Vehicle — Unmanned Multicopter (Rating 3rd), Korea Transportation Safety Authority — Issued: 2023-05-11
Samsung Software Certificate — Advanced
Data Science Specialist — Level 2
Generative AI Power User — Level 3
AI Builder Hackathon — Google Cloud x Samsung Electronics
Issued by Explore Google Cloud
References
Google Scholar — https://scholar.google.co.kr/citations?user=O4IdPk4AAAAJ
IEEE Authors — https://ieeexplore.ieee.org/author/37088591598
LinkedIn — https://www.linkedin.com/in/lowbyyj/