• Guided the data platform team through leadership and technical mentorship, fostering a collaborative and innovative environment via regular 1:1s, retrospectives, and technical exchanges.• Collaborated with stakeholders to define and prioritize requirements, addressing cross-functional needs critical to effective data platform utilization.• Architected a unified data pipeline and set data governance standards, enhancing data security and quality—core aspects for enterprise-level architectural solutions.• Optimized costs by monitoring storage and cluster usage, ensuring efficiency in cloud environments.

Experience• Built a robust data platform using Databricks on AWS, providing a scalable and efficient environment for data processing and analytics.• Designed and implemented a real-time Change Data Capture (CDC) pipeline, enabling continuous data processing and improving internal data analysis through business intelligence services.• Streamlined organization-wide data access by deploying AWS, Databricks, and Snowflake platforms, driving data utilization across teams.Key Responsibilities• Developed and optimized ETL pipelines with Delta Lake and AWS• Managed data infrastructure provisioning using Terraform• Integrated with third-party APIs for data extraction and loading• Developed APIs related to commerce sales data for BI servicesSkills• Databricks, Snowflake, Airflow, AWS S3, AWS Glue, AWS DMS, AWS Lambda, AWS MSK, Terraform, Spring Boot, Python, Spark, Scala, Java, Go

Experience• Built and launched Weverse Shop, the official global fan commerce platform• Contributed to the majority of development aspects of the commerce platform, expanded the service globallyKey Responsibilities• Designed and developed order status processing workflow and database schema• Developed goods in/ex-warehousing, on-site pickup, QR & survey, lottery systems for concerts and fan signing events• Developed admin site and scripts for shipment and delivery tracking• Developed batches for statistics and ensuring data integrity in inventory and delivery• Integrated logistics system and third-party APIsSkills• Java, Spring Boot, Spring Data JPA, Redisson, Jesque, Python, Angular, Typescript, Gradle, Cucumber

Experience• Developed and optimized the backend system for KakaoStory, a social network servicewith 10M MAU, handling large-scale traffic and troubleshooting• Developed the majority of the backend API server for KakaoMusic, a social musicservice, in six months with a small team, showcasing efficient delivery of high-qualityresultsKey Responsibilities• Developed APIs, admin system, and integration tests• Troubleshooted various system failures that occurred during operation• Upgraded elasticsearch version and performed data migration• Integrated legacy systems, transitioning from Play to Spring framework• Conducted API load testing and performance tuningSkills• Java, Spring Framework, Redis, Arcus, Elasticsearch, HBase, Cassandra, ZooKeeper, Logstash, Jesque, Capistrano, Rspec, Ruby, Scala, Spark, Spring Data JPA, Hibernate, nGrinder, JMeter, MySQL, Maven, Nginx

Key Responsibilities• Developed backend API servers for B2B and B2C services, security key management tools, licensing APIs, and on-premise installation programs• Integrated payment gateway APIs for billing• Developed statistical servicesSkills• Java, C, Python, Spring Boot, Spring Data JPA, Redis, Ansible, MySQL, AWS, Jenkins, Maven, Swagger, Tomcat, MyBatis, MySQL, Javascript, Shell script

Selected for Samsung Software Membership, an elite program fostering exceptional software development talent, and engaged in diverse R&D projects