Development Team Leader

* Developed a backend service for integrating and managing multiple e-commerce channels, including channel, product, and sales management.* Designed and implemented sales management features for a backend system handling multiple sales channels.* Created visual documentation for service concepts, detailed business logic (including diagrams), and backend onboarding.* Tech Stack: Python 3.10, FastAPI 0.86.0, Uvicorn 0.15.0, SQLAlchemy 1.4, Alembic 1.7.4, PostgreSQL 14, Visual Studio Code, Git, Azure DevOps, Amazon EKS, New Relic, draw.io.

* Led the development and implementation of technology strategies, and provided reports on the company's technology status.* Researched and assessed emerging technologies for large-scale data analysis and selected technology stacks aligned with company objectives and long-term goals.* Made key architectural decisions and designed the data analytics platform, including partial development of the data pipeline.* Implemented a system for aggregating user behavior data and machine logs.* Designed and recorded computer science and engineering lectures for an online data science graduate program.* Managed an engineering team, including recruitment, onboarding, and training of junior software engineers.* Tech Stack: Erlang/Elixir, Phoenix, LiveView, Elasticsearch, Kibana, Elastic Agent, APM Server, RUM JS, Tailwind CSS, Svelte, D3.js, Python 3.10, undetected-chromedriver, Docker, Docker Compose.

* Developed AI engines and EdTech services to analyze and solve elementary math word problems using natural language processing techniques.* Conducted NLP tasks such as data preprocessing, exploratory data analysis, t-SNE visualization, and syntax parsing of math problems.* Designed and implemented math equation-generating engines and RESTful APIs, applying DevOps (CI/CD) practices.* Tech Stack: Amazon EC2, Docker CE (Engine 19.03), Python 3.6, PyCharm Community 2019, Swagger UI 2, Postman, PostgreSQL, Git, GitLab CI/CD.

* Debugged and optimized legacy logging and monitoring systems to improve performance and reliability.* Tech Stack: Amazon EC2, ECS, Docker Logging Drivers, Elasticsearch, Logstash, Kibana, Scouter Java Agent, InfluxDB, Grafana, Terraform, Ansible, Git, IntelliJ.

* Developed a video content platform tailored for elementary math education.* Evaluated and implemented open-source solutions for video content delivery.* Tech Stack: AWS, Docker CE 1.17, PHP 7, Drupal 7, Opigno 1.27, Clojure 1.8, Luminus, Java 8, Gradle 4.5, Spring Boot 1.5, Swagger UI 2, MySQL 5.7, Git, Bitbucket.

* Developed an e-commerce platform for web fiction, targeting global mobile content markets.* Planned project scope, designed system architecture, and implemented the system.* Tech Stack: AWS, Docker 1.12, Python 3.5, Django 1.9, MySQL 5.6, Visual Paradigm 13 Std.

* Contributed to the design of a web-based system for diagnosing and predicting the remaining useful life of high-pressure LNG pumps and vaporizers.

* Collaborated on the design of a Learning Management System (LMS) and developed AWS-related architecture for big data in education using Visio.

* Designed and implemented mobile app and web platforms using Apache, PHP, MySQL, MongoDB, and AngularJS.* Researched and designed a big data platform for Location-Based Services (LBS) using Python.

* Designed and implemented a database for Stem Cell (hESC, iPSC) omics data and developed a website using Apache, PHP, and MySQL.

* Implemented components for a Knowledge Management System (KMS) for an online community at Seoul National University using the Struts Framework and JSP.

* Maintained and enhanced mobile internet technology (WAP/WML) services for cellular phones launched by SK Telecom.

* Maintained the Learning Management System (LMS) and implemented an online education system for the Naver Education Center.

* Assisted in developing an Enterprise Resource Planning system for SK Cartizen, focusing on GIS/GPS technologies and rental cars.* Developed a web-based user interface using ArcIMS and GIS Map module.* Created a web reporting system using Oz Report and Crystal Report Developer.