Hello. This is Idel from Rakuten Osaka Branch. Please allow me to share my experience about Retrospective. A few years ago, I change my career path from Software Engineer to Project Manager and have since tried different framework, methodo…

(*Masks were taken off for the picture only.) Hi, this is kagaffy! I worked at Rakuma as an iOS engineer from January to March 2021. It was in fact the first time Rakuma had taken an intern, but thanks to everyone’s kindness and support, I…

Hello. I am Toyonaga from Rakuma. I continue to hit against the wall with competitive programming. When do you make a Unique constraint on a database? I had a conversation like this with my senior in the past. This is the scene where I was…

Hello, My name is Zoe, a server side engineer in Rakuma. I like to polish my sneakers these days. This post is about Rails x puma-dev x puma server environment. The original motivation for this post is my laggy local Rails environment with…

Hi, I am Toyonaga from Rakuma, so easy to get tan, by the way. Well, this is quite sudden, but have you heard the script “INSERT ... ON DUPLICATE KEY UPDATE” of MySQL? The script “INSERT, UPDATE” huge data at once. We were using the script…