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 at a loss when I joined a new company. Today I want to share how I adapted to the new company and the...
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 environment, to a Kubernetes-based infrastructure, a journey I proposed and built from scratch. The bigges...
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 transitioning legacy services to Microservices Architecture (MSA) for better scalability and maintainabil...
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 could gain knowledge about core competencies required of developers in the AI coding era and AI collabor...
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 environment to the cloud (AWS), and the infrastructure automation experience using Terraform during this pro...
July 10, 2025
Service Failures Should Be Detected Before Users Report Them - Building Our In-House Monitoring System
Hello. I’m Jeong Jeongil, a 3rd-year backend developer working at a proptech platform. After joining the team in March this year, one thing that stood out was that there were areas for improvement in the team’s monitoring system. Although we were using AWS CloudWatch before, there was an issue that ...
July 4, 2025
Absence of Naming Conventions Leads to Failures
Hello, I’m Jeongil Jeong, a 3rd-year backend developer working at a proptech platform. Today I’d like to talk about the importance of naming conventions, which we know are important in software development but whose importance we tend to overlook when it comes to resource investment. Through a probl...
June 30, 2025
Money Disappeared? Transitioning Account Balance Verification Batch from Tasklet to Chunk & Partitioning
Hello. I’m Jeong Jeongil, a 2-year backend developer working at a lending and investment platform. While internally verifying data consistency in our operational company service, we experienced account balance and internal Point inconsistencies due to transaction processing time and batch work ineff...
December 24, 2024
External API Performance Improvement: Reducing Response Time from 5100ms to 57ms with Look-aside Cache
Hello. I’m a 2-year backend developer currently working at a lending and investment platform. In this post, I’d like to share my experience of improving external API performance using the Look-aside cache pattern. The problems I faced during this process were not simple. Various issues were intertwi...
December 16, 2024
Escaping Cherry-pick Hell: Junior Developers' PR-based Code Review and Git Flow Introduction Story
Introduction Hello. In this article, I’ll share our experience of introducing Pull Request (PR)-based code reviews and Git Flow in a company where PRs didn’t exist, in a chaotic local development environment. At that time, our team worked by merging and pushing from each person’s local, and all deve...
December 10, 2024