Working in Catalog Management Team, Global E-commerce Division. Managing product information provided by top 100 merchants such as Target, Macy's, Bloomingdales, etc. and providing unified product data to clients in global market places.As a senior python engineer, mentoring the team with high quality software principles, design patterns, agile methodology, investigating technical debts and providing insights and solutions.• Refactored the catalog consumers written in python with mongodb and rabbitmq to improve the performance and cpu and memory resources efficiency.• Contributed a python library for configurations and logging.• Integrated with 3rd party log aggregator and provided visualized data analytics dashboard, custom queries, alarms, etc.• Migrated the legacy bamboo build and deployment to dockerization with Jenkins on AWS ECS.• Maintained Elasticsearch and catalog monitoring tool running on MEAN stack.• Conducted training sessions to the team such as Coding Standard, Git Flows, Env. Setup, etc.• Used Agile Kanban Methodology, TDD, user stories on CA rally, Confluence, GIT, CI/CD, Dockerization.

As a main developer, worked on building up a product called Ingage for small businesses. Ingage is an interactive content builder running on iPad. Previously worked on ScrollMotion Enterprise Cloud CMS that provides assets to other products such as the ScrollMotion's web-based content editing tool called SmartStudio and mobile library. • Designed and contributed DB models, RESTful APIs, and API Documentations based on web standards and evaluated security using Python/Django with Django Restful Framework and PostgreSQL on AWS for Ingage from scratch.• Implemented Oauth2 as a provider to provide SSO.• Implemented image post processing using AWS lambda and S3 to serve optimized images for web clients.• Migrated user behavior analytics data pipeline from mongodb to the 3rd party service called KeenIO.• Implemented push notification web interface using 3rd party service called OneSignal, Bootstrap 3, and jQuery.• Used Agile Scrum Methodology, TDD, user stories on Jira, Confluence, GIT, CI/CD.Download Ingage here: https://itunes.apple.com/us/app/ingage-interactive-presentations/id1100355870

As a main developer, worked on a PAAS called ScrollMotion Enterprise Platform(SEP) which is a Cloud based CMS that provides assets to client products which are the ScrollMotion's web-based content editing tool called SmartStudio and mobile library.• Designed and contributed DB models, RESTful APIs, and API Documentations based on web standards and evaluated security using Python/Django with Tastypie API and PostgreSQL on AWS for SEP from scratch.• Contributed the main algorithm using stored procedures as a core content provider which deals with group and individual user entitlements in order to resolve complex and expensive DB communication issues, and it successfully decreased average response time for API endpoints by up to 1,200%.• Created UI framework with bootstrap, modernizr, less and jQuery to share guides and examples of code usages with team. It boosted up the speed of implementation and decoupled front-end and back-end development fundamentals.• Optimized front-end system and decreased average page loading time.• Implemented push notification service for customer support team using AWS SNS.• Used Agile Scrum Methodology, TDD, user stories on Jira, Confluence, GIT, CI/CD.

• Directed conceptual, strategic, and technical creation, integrated GUI web site and web application solution.• Evaluated code to ensure that it is valid, is properly structured, meets industry standards and is compatible with browsers, or platforms.• Created web models or prototypes that include physical, interface, logical, or data models, and developed web site maps, application models, or page templates that meet project goals, user needs, or industry standards.• Designed Restaurant & Retail POS(Point-of-Sale) Android Application• Designed and developed Retail POS iPad Application• Designed and optimized Salon POS software UI.• Designed and developed Online Payment Transaction Reporting Application using ASP.NET C#, MS-SQL 2008, WCF, jQuery.• Designed and developed Online Merchant Application using ASP.NET C#, MS-SQL 2005, jQuery, WCF, and 3rd party ID verification integration (HAPI).• Designed and developed PCI DSS SAQ(Self-Assessment Questionnaire) application using ASP.NET C#, MS-SQL 2005, and jQuery.• Developed Mass Mailing(Email Campaign) System using ASP.NET C#, MS-SQL 2005, jQuery, web service, and windows service.• Developed multiple CMS sites for ISOs (Independent Sales Officers) using ASP.NET C#, MVC, MS-SQL 2005, jQuery.• Developed intranet using MOSS 2007 (MS Office SharePoint Server 2007).

Designed, developed, and managed company site, e-commerce site, and Ebay management system using PHP, MySQL, and Apache.

• Managed Cyber Education System, including coordination of technical issues involving network, hardware, operating systems, and specific software. (Lotus Notes and Domino Server; IMB)• Oversaw network connectivity, implementation, integration, and troubleshooting server equipments for Cyber Education.

• Managed Linux Servers (DNS, Database/Back-up Script, Mail Server) which loads 70+ websites.• Designed and developed 20+ websites using PHP, MySQL, Apache.