Ju Jin Park Email & Phone Number

Utrecht, Ut, Nl

Seoul, South Korea

ZIGBANG is a unicorn startup that operates an online real estate platform and provides a variety of convenience services for apartment residents.● Engineered and launched a backend service for real estate transactions using Node.js and AWS (ECS, S3, RDS). Developed key APIs for document management and integrated third-party APIs for digital signing and contract authentication. Ensured compliance with legal changes, boosting user confidence and generating additional monthly revenue.● Developed REST APIs for a Real Estate CRM System using Node.js, replacing manual Excel-based management. Implemented features for lead tracking, contact management, and task scheduling, resulting in operational efficiency and enhancing data accuracy for better analysis.● Initiated and guided the adoption of e2e/unit testing guidelines, resulting in increased test writing efficiency and contributed 400+ JEST test cases to ensure code reliability.● Built a video hosting backend service with Node.js and AWS (Lambda, MediaConverter, S3, CF, EventBridge, RDS). Reduced costs by 75% by migrating from Vimeo. Developed APIs for video uploads with optimized format conversion, enhancing playback speed by 50%.● Led the integration of Prometheus, Grafana, Tempo, and Loki, which improved system stability and reduced downtimes.● Analyzed and resolved circular reference issues by refactoring the codebase. Introduced CI pipeline checks to catch issues early, achieving 0% runtime errors and enhanced system stability.● Reengineered the apartment community search service with AWS (SQS, Lambda) by changing from a synchronous to an asynchronous process. Implemented incremental syncing to update changes and full syncing to refresh the entire dataset daily, ensuring data consistency between the database and OpenSearch.

Seoul, South Korea

GABIA is an IT company specializing in domain registration, web hosting, cloud services, and groupware solutions.● Enhanced and maintained the mail service's business logic within a groupware solution, including the redevelopment of a legacy PHP mail receiving script in TypeScript and writing 100+ unit tests with JEST, improving feature addition rate.● Optimized the spam reporting process by converting it to an asynchronous process, improving response times from 1000ms to 200ms.● Contributed to the stabilization of the mail archiving service through migration from PHP5.2 to PHP 5.6 and creating development and staging environments.● Developed a mail template management service for a groupware solution using Vue.js and Java/Spring, enhancing non-developer team capabilities.● Created Java-based common libraries, including those for DB credential management and LDAP server authentication, streamlining development processes.● Rebuilt the mailbox compression backend service with PHP, increasing compression capacity to 1TB per user via an asynchronous process. Reduced processing time by 30% through parallel file splitting and compression.

South Korea

● Developed APIs and front-end interfaces for the SK Gas Facility Portal Site, enabling better equipment and workforce management and increasing customer satisfaction.● Implemented IBM Maximo Workcenter by analyzing and documenting operations using Polymer language, which improved workflow processes and team understanding.

Education record

Bachelor Of Applied Sciences, Hospitality Accounting Management