Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am a data-focused backend engineer who enjoys turning complex data into reliable, scalable solutions. I specialize in building data pipelines, ETL processes, and API services, using modern tools to drive data quality and actionable insights. I collaborate across teams to deliver measurable improvements—reducing processing times, cutting costs, and elevating data literacy through knowledge sharing and training.…I am a data-focused backend engineer who enjoys turning complex data into reliable, scalable solutions. I specialize in building data pipelines, ETL processes, and API services, using modern tools to drive data quality and actionable insights. I collaborate across teams to deliver measurable improvements—reducing processing times, cutting costs, and elevating data literacy through knowledge sharing and training.

Chan Kyu Kim





I am a data-focused backend engineer who enjoys turning complex data into reliable, scalable solutions. I specialize in building data pipelines, ETL processes, and API services, using modern tools to drive data quality and actionable insights. I collaborate across teams to deliver measurable improvements—reducing processing times, cutting costs, and elevating data literacy through knowledge sharing and training.…I am a data-focused backend engineer who enjoys turning complex data into reliable, scalable solutions. I specialize in building data pipelines, ETL processes, and API services, using modern tools to drive data quality and actionable insights. I collaborate across teams to deliver measurable improvements—reducing processing times, cutting costs, and elevating data literacy through knowledge sharing and training.

Available to hire

I am a data-focused backend engineer who enjoys turning complex data into reliable, scalable solutions. I specialize in building data pipelines, ETL processes, and API services, using modern tools to drive data quality and actionable insights.

I collaborate across teams to deliver measurable improvements—reducing processing times, cutting costs, and elevating data literacy through knowledge sharing and training.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Korean

Fluent

English

Advanced

Work Experience

Data Engineer at Kidsnote

June 1, 2022 - May 1, 2025

Implemented DBT to modularize SQL transformations, improving reusability and maintainability. Added pre/post-load data validation to improve data quality. Adopted Datahub for an enterprise-grade data catalog. Migrated 700+ tables from Oozie to Airflow, consolidating 10 ETL scripts into 2. Reduced Spark resource usage by 10-60% and improved job execution time by 30% by removing UDFs and enhancing parallel execution. Reduced ad-hoc data requests by 40% by enabling Redash dashboards and automated Slack alerts for anomaly detection. Built a FastAPI-based automation service to extract personal data, attach the encrypted data to Jira tickets, reducing extraction time by 80%. Enhanced logging and verification logic to reduce issue detection time in settlement workflows by 70%. Led internal SQL training sessions to boost data literacy across teams.

Junior Backend Developer at Imguru

September 1, 2019 - January 1, 2022

Built and managed ETL pipelines for loading store, product master data, and sales data into the data lake using AWS Glue, Lambda, and Redshift. Optimized weekly batch processing of product-level pricing data across all stores by generating weekly store-level snapshots (reducing generation time from 1 hour to 20 minutes). Reduced promotional data analysis time by developing an enhanced ETL pipeline. Achieved approximately $10M in annual cost savings through optimized disposal grading and discount application for home appliance products across all Emart stores. Collected and batch-processed news, blogs, social media, and forum posts to load into Elasticsearch. Acted as team lead during manager’s COVID-19 quarantine. Built a Django REST API service to notify and visualize data when risk-related keywords were detected by the overseas business department.