Summary
Overview
Work History
Education
Skills
Timeline
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JIWON BAE

Seoul

Summary

Experienced backend software engineer with over 5 years of expertise in developing and optimizing scalable systems for large-scale applications. Skilled in microservices architecture, cloud infrastructure, and real-time data pipelines. Demonstrated success in improving system efficiency and enhancing user experiences. Proficient in Go, Kotlin, Java, Spring Boot, and cloud platforms such as GCP.

Overview

6
6
years of professional experience

Work History

Safe-Driving Discount UBI Software Engineer

Kakao Mobility
10.2022 - 07.2024
  • Optimized real-time safety score calculation system, migrating from BigQuery/Python to Bigtable/Go, boosting performance by (700ms for 99th percentile) and ensuring efficient processing of complex business logic in cloud-native environment
  • Architected and deployed real-time data pipelines on cloud infrastructure, processing up to 250MB per second and managing over 20 terabytes of data daily to guarantee smooth and timely data operations
  • Redesigned batch processing, migrating from Spark to Go, reducing execution time by 50% (from 1 hour to 30 minutes), and improving maintainability and debugging efficiency for large-scale data pipelines
  • Transitioned safety score calculation model using gradual rollout strategy, minimizing user-perceived score drops, and maintaining user churn rate between 3.94% and 4.37% during initial 20 days.

Realtime Driving Record Software Engineer

Kakao Mobility
10.2022 - 07.2024
  • Implemented Prometheus metrics to monitor consumer lag, ensuring real-time data accuracy and integrity, leading to a 50% reduction in customer service inquiries due to enhanced system responsiveness
  • Engineered a resilient microservice with a retry mechanism using adaptive delays, achieving a 100% data transmission success rate and ensuring the reliability of real-time data processing on GCP infrastructure
  • Designed a cost-efficient graceful shutdown module for the data backfilling process, ensuring precise processing of driving records within two days of shutdown initiation, cutting operational overhead by 75%
  • Implemented data merging and optimization strategies using Cassandra and Redis, managing approximately 17,000 fragmented driving data points per minute, boosting processing efficiency
  • Created an event-based pipeline for real-time user information updates, handling up to 1,500 messages daily, enhancing data reliability and timeliness.

Central Reservation API Software Engineer

Kakao Mobility
10.2019 - 09.2022
  • Engineered a scalable microservices-based reservation API with Spring Boot and Kotlin, integrating 7 services to reduce new service launch workload by 33%, enhancing scalability and agility on GCP
  • Incorporated valet, EV charging, and parking services into the Central Reservation API, creating a composite product data model for multi-service reservations
  • Developed and integrated car wash, commute, and shuttle bus services into the Kakao T app
  • Launched commute and shuttle bus services, integrating them into the reservation system
  • Implemented and maintained direct reservation functionality for car wash services within the mobile app
  • Played a pivotal role in developing the overall reservation flow for various services within the Kakao T ecosystem, preventing duplicate reservations and facilitating seamless order creation based on service types and payment methods.

Global Taxi Roaming Software Engineer

Kakao Mobility
12.2018 - 09.2019
  • Played a core role in integrating Splyt API with 'Kakao T Overseas Vehicle Call' service for Southeast Asia, significantly contributing to Kakao Mobility’s global expansion and enhancing the traveler experience through seamless cross-border service functionality.

Education

B.Eng - Software Engineering

Ajou University
Gyeonggi-do, South Korea
02.2019

Skills

  • Programming Languages: Go, Kotlin, Java
  • Tools & Technologies: GCP Bigtable, GCP CloudRun, Cassandra, Docker, Redis, Kubernetes, Spring Boot, MySQL, MongoDB

Timeline

Safe-Driving Discount UBI Software Engineer

Kakao Mobility
10.2022 - 07.2024

Realtime Driving Record Software Engineer

Kakao Mobility
10.2022 - 07.2024

Central Reservation API Software Engineer

Kakao Mobility
10.2019 - 09.2022

Global Taxi Roaming Software Engineer

Kakao Mobility
12.2018 - 09.2019

B.Eng - Software Engineering

Ajou University

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