Engineered a large-scale big data pipeline application, utilizing Python for data manipulation and parallel bulk uploads, to stream 300 million transaction records from multiple Kafka topics to Elasticsearch in real-time.Devised and deployed an internal automation tool with NEXT.js, streamlining QA and monitoring across multiple applications by implementing issue notifications.Leveraged Elasticsearch and machine learning techniques to predict future data trends, generating over 120 daily, weekly, and monthly reports.Developed a secure data routing endpoints for seamless data retrieval from Elasticsearch, ensuring minimal disruption to ongoing operations.Designed and executed a comprehensive CMS system, featuring CRUD functionality, and crafted a client application using NEXT.js for event, trip, and vehicle management.Introduced views-per-fleets functionality for user-specific page access and implemented email-notification features for event subscriptions.Orchestrated a Luigi Data Processing Pipeline for TMS transactions, employing Pandas and NumPy for data analysis and integration with databases (Oracle, MongoDB, Tibero, ELK).Engineered an Airflow ETL Data Processing Pipeline for repeatable job operations.Automated ETL processes with UNIX shell scripts, contributing to dashboard reporting and operational control in a UNIX environment.Collaborated on Digital Key 2.0 development, identifying and resolving bugs using Java Spring framework.

Designed and implemented new pages and components for E-commerce websites, deploying code on a daily basis.Coordinated the full website migration of multiple E-commerce applications and conducted user acceptance testing (UAT) with Salesforce and the OSF digital team to improve the user experience.Maintained the content and functionality of four different GUESS websites, including the construction of multiple views and the development of custom daily email newsletters.Created and maintained responsive, reusable code for E-Commerce websites, including redesigns, seasonal updates, production work, and daily maintenance.Assisted in the deployment of online marketing initiatives, including banner advertisements.Supervised a junior web developer on foundational web development principles and company procedures for completing web development tasks.Redesigned and built the UI/UX of a new size chart with fully-responsive viewports and used modern CSS on pages and banners to improve the UI/UX.Optimized Google extensions to simplify the creation of pixel-perfect pages and ran A/B tests to test new homepage features.

Utilized React.js to design and develop new features as well as enhance existing ones for a CMS client applicationRevamped the layout of an eCommerce site, resulting in a 20% increase in salesWorked directly with customers as a help desk, gathering their business needs and providing technical supportImproved the on-site SEO of commercial clients' websites to increase visibility and drive trafficUsed GraphQL and React Apollo to query and mutate information from the back-endCollaborated with the UX design team and product owners to ensure a user-friendly software interface

Conducted data analysis to identify trends and patterns in large datasetsCreated and maintained documentation for data lineage and data mappingCreated reports and presentations to communicate findings to stakeholdersAssisted in the design and development of a data warehouse and ETL processesAssisted in the development of data governance policies and proceduresMonitor SQL server and database performance and proactively address potential performance issues.Work with the development team to resolve bug-fixes and assist in relevant testing through various environmentsCommunicated with overseas business partners in Korea to arrange B2B shipments of contents and backend developers.