Recent Posts
View the 10 most recent blog posts.
What is Manticore Search? Configuration, Setup, and Practical Application
Hello. I’m Jeongil Jeong, working as a backend developer at a PropTech platform. “We need a search feature.” When you hear this, one name probably pops into most developers’ heads. That is Elasticsear...
November 25, 2025
APIs Slowing Down After Deployment: Improving JVM Cold Start Problem by 85%
Introduction Recently, our team migrated from a Docker Compose-based production environment to Kubernetes. It was a choice to properly utilize features needed in an MSA environment, such as scalabilit...
November 18, 2025
Have I Embraced the Future? - How Developers Collaborate with AI Coding Tools
Hello. I’m Jeongil Jeong, a 3rd-year backend developer working at a proptech platform. These days, the weight of AI coding tools among developers is gradually increasing. GitHub Copilot, ChatGPT, Clau...
October 25, 2025
Changed MySQL Column Type from bigint to varchar and It Got 8x Slower...! : Procedure Performance Degradation Troubleshooting
Introduction Hello. I’m Jeongil Jeong, a 3rd-year backend developer working at a proptech platform. Today, I’d like to share an interesting performance issue that occurred in our service and the resol...
October 20, 2025
From 16 Repositories to One - MSA Multi-Module Migration Story
Introduction Hello. I’m Jeongil Jeong, a 3rd-year backend developer working at a proptech platform. In March 2025, I joined the team and went through the process of converting 16 backend projects mana...
October 16, 2025
3 Ways for Developers to Quickly Adapt to a New Company
Hello. I’m Jeongil Jeong, a 3rd-year backend developer working at a proptech platform. Job changes are not easy for anyone. New codebase, unfamiliar team culture, unknown business domain… I was also a...
September 30, 2025
From No Dev Server to GitOps: My Journey of Introducing Kubernetes from Scratch
Hello. I’m Jeong Jeong-il, a 3rd-year backend developer working at a PropTech platform. Today, I’d like to share the process of migrating our MSA services, which were running on a legacy Docker enviro...
July 24, 2025
Is Gradual MSA Transition an Illusion? - Battling with Tightly Coupled Legacy Services
Hello, I’m Jeongil Jeong, a 3rd-year backend developer working at a proptech platform. I joined the team recently in March, and like many companies, our team was undertaking the grand journey of trans...
July 21, 2025
Toby's Meetup Report: 31-Year Developer's Message on How to Live as a Developer in the AI Era
Yesterday (July 10), I attended a meetup titled [31-Year Developer’s Message on “How to Live as a Developer in the AI Era”] . It was a lecture by Toby hosted by Inflearn, and it was time where I coul...
July 11, 2025
From On-Premises to Cloud - A Zero-Downtime Migration Story
Hello, I’m Jeong Jeong-il, a 3rd-year backend developer working at a PropTech platform. In this post, I’d like to share my experience migrating a monolithic server operating in an on-premises environm...
July 10, 2025