• Developed a one-time-use virtual credit card payment flow in Java running as Docker containerized AWS service, which is seamlessly integrated into the Master Card payment stream, enhancing transaction security and user experience. • Served as the technical lead for the UK Smart Grant project, conducting feasibility testing for a secure fingerprint IoT payment card designed for elderly users. • Leveraged patented OTAC technology to ensure robust security and accessibility for the IoT payment card solution. • Built operations tools in Python to automate AWS service management and resource handling.

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Last Mile | Distributed Message Processing Service • Developed and managed a Java-powered message gateway for handling Amazon delivery requests and status updates synchronously and asynchronously. • Led system architecture, cost optimization, service reliability, requirement analysis, and resource planning. • Contributed to Amazon Flex Android app, focusing on customer signature flow during the Covid-19 pandemic. Alexa Communication Platform • Extended Alexa VOIP services using Kamailio and C/C++. • Developed a distributed load test framework in Java ensuring service availability. • Created internal tools in Python, Java, Perl, and shell scripting for AWS resource configuration and scaling.

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FailAssassin service • Developed FailAssassin with JQuery, a tool designed to resolve bugs by clustering test failures based on potential root causes identified from test run execution log analysis. • Implemented a natural language processing algorithm that increased the accuracy rate of test failures clustering. Selenium-Based Test Automation Framework • Spearheaded the development of a data-driven test automation framework written in Java, overseeing test data design and test run planning. • Integrated TestRail with the CI/CD pipeline in Jenkins to automate test execution and generate detailed test reports for stakeholders.

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• Developed and managed REST APIs and JEE backend service running on IBM WebSpear with DB2 for the Active Trader web client, enhancing functionality and improving user experience. • Generated essential SDLC documents, including Software Requirement Specifications, Technical Design Documents, and Test Plans, ensuring clarity and adherence to project requirements.

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• Design the data schema for the banking master data repository with IBM MDM (Master Data Management), ensuring efficient data management, consistency and integration. • Developed an ETL (Extract, Transform, and Load) application to seamlessly integrate multiple data sources. • Produced essential SDLC documents, including Technical Design Document, Security Control Document, and Implementation Plan.

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05/2009 ~ 09/2010, RIA application specification standardization in OMG / TTA - Chartered RIA WG in OMG and managed technical committee meetings - Conducted RIA platform architecture, RIA UI component model and RIA programming language specification research • Designed RIA (Rich Internet Application) technical specification for UI component structure and application platform. • Developed data mode component written in C# running in RIA platform

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• Designed online banking message schema for integrating legacy core banking system into online banking retail service.

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Demonstrated ability to effectively manage and mentor large teams of IT professionals (6 development teams of 64 SW engineers), fostering a collaborative and high-performance work environment. Web Information Extraction System • Created a web scraping and information extraction system for ClickPrice, a shopping item price comparison service. • Implemented a search engine to support natural language-based queries such as ‘tv with reasonable price’, ‘budget tv’. Electronic Document Management System (EDMS) • Designed meta data repository and index, and life cycle management. • Developed paper scanning, image viewing applications, and image enhancement libraries in C/C++. • Led ECMS projects for major retail banks in Korea and Thailand.

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