Software Engineer with 3.5 years of experience in product server development.

Proficient in maintaining the stability of complex projects and prototyping MVP products with agility.

Bachelor of Computer Science undergraduate, have served as military service obligation through the Industrial Personnel System (산업기능요원).

Developed demand-side advertising platform for advertisers in Ads Platform & Performance Team.

• In charge of serving & feature engineering of pCTR Models & Performance tuning of Ad Server.

• Researched & implemented budget pacing algorithm and stabilized platform revenue stream.

• Constructed ad event collector module to develop pCVR Models.

Managed advertising execution pipeline on the platform of several ad product types, including performance and reward ads.

• Built audit log and notification system of the platform with cross-functional architecture using internal event bus.

Launched ‘My Privacy Report’, a data-centric product highlighting the company’s transparency of privacy usage in Privacy Silo.

• Built real-time data pipeline using Apache Kafka, handling 13M+ data daily average.

• Made significant improvements upon internal cache library: migration from Java to Kotlin DSL, resolving cache stampede issue, and reducing redundant deserialization process.

Voluntarily assembled a team to launch a “Daily Fortune” service and generated ₩100M+ profit.

Developed in-house data labeling service using Spring MVC Framework with Kotlin.

Migrated manual settlement system to an automated internal admin platform.

Developed used car trading backoffice using Django Rest Framework.

Developed a medical interview (CPX) simulation service.

Relevant Courses: System Programming, Algorithm, Data Structure, Computer Architecture...

Leave of absence until March 2025 to fulfill military service obligation (산업기능요원).

Proficient in developing stable, complex product servers with multiple programming languages.

Experience in k8s infrastructure & distributed MSA systems management.

Comprehensive understanding of database storage solutions and caches.

Intermediate level of communication skills in English.