Career Dev. BannerpreviousplaynextBiggest Sale of the Year99% OFF Drops Everyday!Biggest Sale of the Year99% OFF Drops Everyday!EVENT7.1 - 7.10Unlock This Class!Limited Time OnlyUnlock This Class!Limited Time OnlyEVENT7.1 - 7.15Welcome to Coloso! Sign Up & Get Exclusive GiftsWelcome to Coloso! Sign Up & Get Exclusive GiftsEVENTMastering JAVA Stream with 25 Practical Backend Development ExercisesSenior Software Engineer, Seunghwan LeeBack-end Essentials: Architecture for High Capacity Service with RedisSoftware Engineer, Daemyeong KangBuilding a Highly Scalable Architecture for a Super-AppSenior iOS Engineer, Soojin Ro