- Designed, developed, and managed internal platform tools across multiple servers (node.js, Typescript, python, react)- Developed a fleet management service to track and visualize vehicle positions in real time, store historical routes, live stream vehicle cameras, and manage drivers (web and mobile)- Developed full-stack app for visualizing data, monitoring real-time deployment status, and viewing/analyzing statistics- Developed and maintained live-stream cross-platform WebRTC SFU… Show more - Designed, developed, and managed internal platform tools across multiple servers (node.js, Typescript, python, react)- Developed a fleet management service to track and visualize vehicle positions in real time, store historical routes, live stream vehicle cameras, and manage drivers (web and mobile)- Developed full-stack app for visualizing data, monitoring real-time deployment status, and viewing/analyzing statistics- Developed and maintained live-stream cross-platform WebRTC SFU server from scratch (Typescript) to allow real-time streaming of vehicle cameras and visualizations of telemetry data in 2D and 3D over extremely low-bandwidth network- Created real-time data pipelines that analyze, aggregate, and store data in DB- Designed and optimized relational DB schema, indexes, keys, and SQL queries for efficient processing- Implemented message queue with autoscaling to handle load spikes- Handled CI/CD and IaC using Docker, multi-container builds, private registry, and custom scripts- Utilize different protocols and Content-Type for certain use cases (Websockets, EventStream, TCP sockets, etc.)- Reduced and optimized memory usage during certain operations to eliminate lagginess and crashes Show less

- Developed full-stack automated cryptocurrency trading application written in typescript/Node.js, React.js, express.js, and NGINX with MongoDB for web server and MySQL for core application financial data- Handled all DevOps duties, including CI/CD, multi-container docker-compose, AWS Cloud, Linux server administration, load balancing, and security- Designed and implemented infrastructure of application across AWS cloud, on-premise servers, and crypto exchange API- Cloud… Show more - Developed full-stack automated cryptocurrency trading application written in typescript/Node.js, React.js, express.js, and NGINX with MongoDB for web server and MySQL for core application financial data- Handled all DevOps duties, including CI/CD, multi-container docker-compose, AWS Cloud, Linux server administration, load balancing, and security- Designed and implemented infrastructure of application across AWS cloud, on-premise servers, and crypto exchange API- Cloud infrastructure is EC2 with custom AMI in an auto-scaling group behind load balancer, and Route 53. We stored DevOps config files in S3 and secrets in AWS Parameter Store- Divided up work between 5-person development team according to employee strengths- Created dashboard to show graph data, indicators, machine learning calculations, transaction history, and more- Designed and programmed PHP backend for a triple overlapping, multi-tree multilevel marketing website with thousands of users- Wrote complex recursive SQL algorithms to calculate payments accurately along all branches of each tree, taking into account returns/cancellations- Seamlessly integrated automated payment calculations on rolling basis on daily, weekly and monthly periods- Created detailed admin dashboard to display sales, payments, log data, and automatically generated reports in Excel- Kept up with constantly changing requirements about tree structure and layout- Carefully crafted functions to move groups of users around in the tree upon request Show less

- Converted existing PHP website to modern tech stack using React, Node.js, Express, MySQL, Nginx reverse proxy, and Redis- Implemented containers with Docker & CI/CD pipeline with Jenkins, Github, Github Actions, Dockerhub & Watchtower- Significantly increased website loading speed using Redis- Managed Linux Ubuntu server, SSL certificates, website security, IP filtering by country- Created external API endpoints to integrate CRM and ERP software- Integrated Korean payment… Show more - Converted existing PHP website to modern tech stack using React, Node.js, Express, MySQL, Nginx reverse proxy, and Redis- Implemented containers with Docker & CI/CD pipeline with Jenkins, Github, Github Actions, Dockerhub & Watchtower- Significantly increased website loading speed using Redis- Managed Linux Ubuntu server, SSL certificates, website security, IP filtering by country- Created external API endpoints to integrate CRM and ERP software- Integrated Korean payment system- End-to-end tests with Puppeteer and unit tests with Jest Show less

TeachyBuddy.com- Job website for teachers using an Airbnb-style, real-time, auto-updating map interface with real-time chat, multiple account types, secure document uploading, and more- Developed website from scratch using React.js, Express, Node.js, MongoDB, running on Docker using multi-container docker-compose- Used Google Maps Javascript API and Geocoding API to dynamically update map in real time as user swipes- Used Socket.io websockets for real-time chat between teachers… Show more TeachyBuddy.com- Job website for teachers using an Airbnb-style, real-time, auto-updating map interface with real-time chat, multiple account types, secure document uploading, and more- Developed website from scratch using React.js, Express, Node.js, MongoDB, running on Docker using multi-container docker-compose- Used Google Maps Javascript API and Geocoding API to dynamically update map in real time as user swipes- Used Socket.io websockets for real-time chat between teachers and recruiters- Document upload/download functions with support for different language encoding- Used JSON web tokens for secure authentication and authorization- Responsive design that adjusts for phones, tablets, and computer screens with Material UI Show less

- Fully functional e-commerce dropshipping website made from scratch using HTML, CSS with bootstrap, PHP, MySQL, and PayPal integration- Maintained site security with prepared statements for all database queries- Designed and implemented relational database structure for users, products, payments, and more- Registration/login/logout with automated emails and non-logged in payment methods- Added custom search function, coupon codes, and responsive design for tablets, mobile, PC

- Hired, managed, and trained 15-person team of Quality Control Specialists to ensure smooth, timely video content delivery for major streaming platform Kocowa.com- Organized team workflow and motivated team to hit daily and weekly submission goals- Programmed automated edit assist software to improve efficiency and reduce mistakes- Translated and copywrote for TV shows, documents, websites, ads, and more- Localized content aired in 110 countries for Korea's largest stations… Show more - Hired, managed, and trained 15-person team of Quality Control Specialists to ensure smooth, timely video content delivery for major streaming platform Kocowa.com- Organized team workflow and motivated team to hit daily and weekly submission goals- Programmed automated edit assist software to improve efficiency and reduce mistakes- Translated and copywrote for TV shows, documents, websites, ads, and more- Localized content aired in 110 countries for Korea's largest stations (KBS, MBC, SBS, JTBC, etc.) Show less