Experience

Johnson Health Tech. Co., Ltd.

• Taiwan
• Wellness and Fitness Services
• 300 - 400 Employee

• Principal Engineer, Video

  • Sep 2023 - Present

  #Responsibility 1. Establish an AWS-based VOD and Live streaming platform 2. Video streaming performance and cost optimization #Responsibility 1. Establish an AWS-based VOD and Live streaming platform 2. Video streaming performance and cost optimization



DeepHow

• United States
• Software Development
• 1 - 100 Employee

• Senior AI/ML Researcher

  • Mar 2022 - Apr 2023

  # Responsibility 1. Solve video transcoding issues and improve performance 2. Study new technologies and open source projects for AI and video transcoding # Achievements 1. Video transcoding speed-ups - On AWS: saved 65~79% and 45~60% for video editing and upload time - On Ali-Cloud: saved 3~27% for video upload time - Ensure video quality with subjective quality assessment 2. Transcoding-free online video editor POC - Nginx-based video-on-demand service (Nginx-vod-module) via HLS - Perform erase, mute, voice-over editing on video with response time in seconds - Auto re-align captions for the edited video - Produce downloadable file with captions # Technology stacks - Python (Flask, FastAPI), Node.js, Docker - Google Cloud Platform, AWS, Ali-Cloud, Azure - Video transcoding (FFmpeg , AWS MediaConvert, Ali-Cloud ApsaraVideo Media Processing) - Knowledge of LLM, NLP, LangChain and chatGPT prompt engineering - Firebase, PostgreSQL, MongoDB - Git (GitLab), Jenkins Show less



Institute for Information Industry

• Taiwan
• Research Services
• 700 & Above Employee

• Senior Engineer

  • Mar 2018 - Mar 2022

  # Responsibility 1. Hardware selection and software development 2. Perform field survey and verify hardware/software setup for the traffic enforcement system 3. Writing proposals and reports/slides 4. Project leader (2019) 5. Intern interviewer # Achievements 1. Build a edge computing system for traffic event detection from scratch - Establish the architecture and code base - Develop 15+ traffic event detection/prediction functions based on CNN object detection: * RTSP live detection from CCTV camera or offline detection by MP4 files * Traffic law violation: auto generation of violence evidence photo/videos with LPR * Safety event: live detection with instant CMS warning * Live vehicle speed monitoring: by Smartmicro and U&U Engineering radars * Cloud event synchronization by MQTT * Solve the problem of multiple bounding boxes on the same object by 2nd MNS - Help Confucian Co., Taiwan's largest traffic law violation handling company, to import the automatic traffic law violation detection system - Design a camera view to real world mapping methodology based on geometric transformation 2. Backend API development for III EI-PaaS platform - Joint project with Advantech Co. - Develop backend APIs as information retrievers from Cloud Foundry - Implement micro-service communications by RabbitMQ - Improve API speed and reliability by threading, workflow re-design, and re-encapsulate Python requests library to have retry capability # Technology stacks - Python (OpenCV, Pytorch, Flask), Docker, MQTT, RabbitMQ - CNN object detection (YOLO v3/v4/v5, CenterNet), object tracking - Knowledge of deep learning trajectory prediction (LSTM, SocialGAN) - Speed radar software development - CloudFoundry - Git (GitLab), Jenkins, Scrum/Agile Show less