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Nat Lee

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Experience

Work, education, skills and open-source contributions on one page. It also prints as a compact CV.

Work

  1. HD Renewables Co., Ltd.

    1. Deputy Manager

      Transfer

      2026.05 – PresentStar Trade Co., Ltd.Taipei, Taiwan

      Part of HD Renewables Co., Ltd.

      On assignment in Tokyo, Japan · 2026.05 – 2026.08

      Transferred within the HD Renewables group to its subsidiary Star Trade while retaining the Deputy Manager role. Leads engineering for overseas power trading — market data, bidding systems, and the planning of automated trading modules — including a Tokyo posting to drive vendor requirement design and support live bidding.

      • Lead development of overseas power-trading and market-data systems together with the team
      • Build bidding and tender systems for overseas electricity markets
      • Plan and architect automated trading modules
      • Stationed in Tokyo to work face-to-face with contracted vendors, gathering requirements and defining system scope and specifications
      • Turn vendor discussions into design and delivery plans, then track them through to implementation
      • Support power-trading bidding in the Japanese market on site, coordinating between traders and engineering
      • Drive the trading data platform's evolution across the corporate group

      Results

      • Transferred within the HD Renewables group to Star Trade while retaining the Deputy Manager role
      • Completed a three-month Tokyo assignment (2026.05–2026.08) as the on-site technical counterpart to the vendors, aligning requirements and system design directly with them
      • Supported Japanese power-trading bids on site, shortening the feedback loop between the trading desk and the engineering team
      • Python
      • Docker
      • PostgreSQL
      • Airflow
      • Time Series Analysis
      • Automated Trading
      • System Design
      • Vendor Management
      • Requirements Engineering
    2. Deputy Manager

      Promotion

      2026.03 – 2026.05Taipei, Taiwan

      Moved onto the management track as Deputy Manager and kicked off the power-trading data platform — a centralized system that ingests Japan's electricity market and weather data to underpin trading and forecasting.

      • Designed and led development of a power-trading data platform from the ground up
      • Built ingestion for Japanese electricity-market data (JEPX) and meteorological data feeds
      • Defined the data model and architecture powering price forecasting and trading analytics
      • Coordinated the engineering team while shaping the platform roadmap

      Results

      • Transitioned from an individual contributor to a management role
      • Launched the foundation of the trading data platform consolidating market and weather data
      • Python
      • Docker
      • PostgreSQL
      • Airflow
      • Elasticsearch
      • Time Series Analysis
      • System Design
    3. Principal Engineer

      Promotion

      2025.09 – 2026.03Taipei, Taiwan

      Promoted to Principal Engineer, taking technical ownership of the international power-trading strategy stack — the spot-price prediction models and the data pipelines feeding the Japan and Australia trading desks.

      • Led development of spread and spot-price prediction models for the Japan and Australia power markets
      • Set the technical direction for the trading data pipeline and model-serving infrastructure
      • Mentored engineers and reviewed designs across the trading platform
      • Partnered with traders to turn market requirements into production tooling

      Results

      • Promoted from Senior Engineer to Principal Engineer within the International Power Trading Division
      • Hardened the spot-market prediction pipeline into a reliable daily production service
      • Python
      • Deep Learning
      • Time Series Analysis
      • Docker
      • Django
      • Elasticsearch
      • MLOps
    4. Senior Engineer

      Transfer

      2024.12 – 2025.09Taipei, Taiwan

      Transferred to the International Power Trading Division, focusing on developing power trading strategies for Japan and Australia markets. Developing spread strategy models to predict spot market electricity prices and assist traders in decision-making.

      • Develop international power trading strategies for Japan and Australia markets
      • Create spread strategy models for predicting spot market electricity prices
      • Support traders with data-driven decision-making tools
      • Apply technical solutions to real trading scenarios to support overseas market expansion

      Results

      • Developed spot market prediction model for electronic trading strategies
      • Python
      • Deep Learning
      • Docker
      • Django
      • Elasticsearch
      • Time Series Analysis
      • MLOps
    5. Senior Engineer

      2023.04 – 2024.12Taipei, Taiwan

      Developed solar power prediction and display systems, optimized power matching algorithms, and integrated various platforms with advanced authentication systems.

      • Developed time series models using Python and PyTorch to predict solar power generation for Tainan FamilyMart Pingfeng store energy storage demonstration site
      • Implemented scheduled data extraction and processing using Airflow, pushing load and generation data to display dashboards
      • Optimized power matching algorithms in collaboration with ITRI, reducing computational complexity from O(N⁴) to O(N³) using MaxFlow algorithm
      • Integrated optimized algorithms into power matching platform backend using Django REST APIs
      • Implemented asynchronous computing with token system and email notifications for better UX
      • Developed third-party login (SSO) functionality integrating Microsoft Azure AD and Google login

      Results

      • Successfully deployed solar power prediction system for demonstration site
      • Improved algorithm efficiency by 25% through optimization
      • Enhanced platform security and user experience with SSO integration
      • Python
      • PyTorch
      • Django
      • MySQL
      • Airflow
      • Docker
      • Time Series Analysis
      • MLOps
      • SSO
      • REST API
  2. Big Data Co., Ltd.

    1. Senior Software Engineer

      2021.12 – 2023.04Taipei, Taiwan

      Developed NLP and data platforms using Python and deep learning frameworks. Built sentiment analysis platform processing over 3 billion data points with 30% accuracy improvement. Led backend development for dashboard projects and CDP platforms.

      • Developed sentiment analysis platform using deep learning frameworks, improving accuracy by 30%
      • Built distributed services using Docker to process large-scale daily crawler data stored in Elasticsearch
      • Established automated DevOps for public opinion data analysis and push notification mechanisms
      • Developed internal data management and annotation tools
      • Created various public opinion monitoring dashboards based on different business requirements
      • Implemented CDP platform using FastAPI and Elasticsearch for cross-website user identification services

      Results

      • Processed over 3 billion data points through sentiment analysis platform
      • Achieved 30% improvement in model accuracy compared to previous solutions
      • Successfully deployed scalable microservices architecture handling high API traffic
      • Python
      • PaddlePaddle
      • PyTorch
      • Django
      • FastAPI
      • Elasticsearch
      • MySQL
      • Docker
      • Kubernetes
      • RabbitMQ
      • Redis
      • Airflow
  3. TAIWAN-CA, Inc.

    1. Senior Software Engineer

      2021.09 – 2021.11Taipei, Taiwan

      Worked on cybersecurity products, focusing on CA certificate applications and writing comprehensive test cases for security systems.

      • Developed test cases for cybersecurity-related products
      • Worked on CA certificate applications and implementations
      • Ensured product quality through comprehensive testing procedures

      Results

      • Developed comprehensive test suite for TSA (Time Stamping Authority)
      • Successfully implemented certificate-based security products
      • Python
      • Java
      • Information Security
      • Cryptography
      • Certificate Management
      • Test Case Development
  4. Infortrend Technology, Inc.

    1. Image Processing Software Engineer

      2019.10 – 2021.03New Taipei, Taiwan

      Specialized in computer vision and deep learning solutions. Developed AI applications for medical imaging, retail analytics, and embedded advertising systems using edge computing devices.

      • Applied Docker virtualization technology to simplify development processes
      • Developed automated MRI/PET brain medical image AC-PC correction preprocessing solutions
      • Created AI image recognition applications on Nvidia Jetson edge devices with system integration
      • Developed fisheye camera conversion algorithms for human pose recognition applications
      • Built and integrated AI product frontend and backend architectures

      Results

      • Developed AI solution for Alzheimer's disease diagnosis using MRI/PET brain image processing
      • Created human pose recognition system for fisheye cameras improving narrow space monitoring
      • Built heat map detection system for retail stores optimizing product exposure
      • Implemented embedded advertising recommendation system detecting crowd demographics
      • Python
      • OpenCV
      • Docker
      • Deep Learning
      • Computer Vision
      • Nvidia Jetson
      • SQLite
      • jQuery
      • Edge Computing
      • Medical Imaging
  5. Leopard Mobile, Ltd.

    1. Software and AI Engineer

      2018.07 – 2019.10Taipei, Taiwan

      First professional role developing web scraping and data analysis platforms. Built NLP models, voice recognition systems, and blockchain-related applications using various technologies.

      • Developed frontend and backend web applications and microservices for blockchain trend products
      • Created web scraping programs for major social media platforms (Twitter, Facebook, Telegram) using Selenium
      • Built and managed public opinion analysis databases using MySQL
      • Developed MySQL database remote backup and synchronization systems
      • Created AI content classification technology for voice assistants
      • Built AI Chinese reading comprehension online services
      • Developed text and speech annotation platform systems

      Results

      • Built ICO sentiment analysis platform 'Rating Token & Coin Master' with integrated NLP models
      • Developed Taiwanese Hokkien song recognition model for voice-controlled smart speakers
      • Created comprehensive data annotation platform for Chinese reading comprehension and Taiwanese speech recognition models
      • Successfully deployed scalable web scraping infrastructure processing social media data
      • Python
      • JavaScript
      • Django
      • Flask
      • MySQL
      • Selenium
      • Docker
      • NLP
      • Machine Learning
      • Web Scraping
      • Deep Learning

Education

  • 2017 – 2019

    National Taiwan University of Science and Technology

    Master · Computer Science and Engineering

  • 2012 – 2016

    National Taiwan Ocean University

    Bachelor · Marine Environmental Informatics

    Minor in Computer Science and Engineering

Skills

Years of hands-on use, and where you can see it in my projects.

Programming Languages

SkillExperienceNotesUsed in
Python8 yrsPrimary language for backend development, data analysis, and machine learningSolar Power Prediction SystemQWOP with PPOBrain MRI Pipeline
JavaScript4 yrsFrontend development and API integrationdjango-docker-guiElysion CalendarIP-FIND-ChromeExtension
Java2 yrsEnterprise application development
TypeScript2 yrsType-safe JavaScript developmentTelepyGantt Studiomorphkit

Backend Frameworks

SkillExperienceNotesUsed in
Django5 yrsPrimary web framework for REST API developmentSolar Power Prediction SystemPower Trading AI Systemdev-dock-manager
FastAPI3 yrsHigh-performance API developmentPower Trading AI SystemStreet Scene OCR
Flask4 yrsLightweight web applications and microservicesyoutube-redirect-playerYouTube Video Redirect Service

AI/ML Frameworks

SkillExperienceNotesUsed in
PyTorch4 yrsDeep learning model development and deploymentSolar Power Prediction SystemQWOP with PPOPower Trading AI System
TensorFlow3 yrsMachine learning and neural network developmentsimply-blur-detector
PaddlePaddle2 yrsNLP and computer vision applicationsSentiment Analysis Platform
OpenCV4 yrsComputer vision and image processingBlur-Generatorbatch-crop-imagesFace Wall Generator

Databases

SkillExperienceNotesUsed in
MySQL6 yrsPrimary relational database for web applicationsSolar Power Prediction System
Elasticsearch4 yrsSearch engine and analytics for large datasetsPower Trading AI SystemSentiment Analysis Platform
MongoDB2 yrsNoSQL database for flexible data storage
Redis3 yrsCaching and session managementdev-dock-manager-rustdjango-project-templateSentiment Analysis Platform

DevOps & Tools

SkillExperienceNotesUsed in
Docker5 yrsContainerization and deploymentdev-dock-manager-rustStreaming PlayerBrain MRI Pipeline
Kubernetes2 yrsContainer orchestrationSentiment Analysis Platform
Airflow3 yrsWorkflow orchestration and data pipelineSolar Power Prediction System
Git6 yrsVersion control and collaboration

Specializations

SkillExperienceNotesUsed in
Natural Language Processing5 yrsSentiment analysis, text classification, and language models
Computer Vision4 yrsImage processing, object detection, and pose estimationBlur-Generatorfisheye-warpingopenpose-detect-hands-with-heatmap
Time Series Analysis3 yrsForecasting and pattern recognition in temporal dataSolar Power Prediction SystemPower Trading AI System
MLOps3 yrsModel deployment, monitoring, and lifecycle managementSolar Power Prediction System

Open-source contributions