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Dooho Chang has a diverse work experience in various leadership and engineering roles. Dooho is currently serving as the CTO at PortOne Korea since July 2022. Prior to that, they worked as the Head of Engineering at the same company from May 2021 to June 2022.

Before joining PortOne Korea, Dooho Chang worked at Riiid as the Vice President of Engineering from November 2019 to May 2021. In this role, they played a pivotal role in technical leadership, overseeing areas such as plug-and-play MSA, content system, MLOps system, and authentication. Dooho implemented technological advancements by transitioning from Ruby to Kotlin. Additionally, they had expertise in DevOps practices, leveraging infrastructure-as-code and containerization technologies such as Terraform and Kubernetes.

Earlier in their career, Dooho Chang served as the Backend Lead at Devsisters, where they designed and developed the backend for the mobile game, CookieRun: Kingdom. Dooho also provided technical supervision and leadership, along with building a highly scalable cluster server using Scala and the Akka framework.

Dooho Chang began their professional journey as an iOS Team Lead at \ubc45\ud06c\uc0d0\ub7ec\ub4dc(\ub808\uc774\ub2c8\uc2a4\ud2b8) in December 2016. In this role, they played a significant role in the design and development of the Banksalad iOS application. Dooho managed product development and made team-level decisions, incorporating a reactive client-side architecture using RxSwift and MVVM design pattern.

Their career started as a Software Engineer at VCNC in October 2015, where they gained initial experience before moving on to more challenging roles in the field.

Dooho Chang completed their undergraduate degree in Computer Science from Korea University, where they attended from 2011 to 2020. Prior to that, they were enrolled at Seoul Science High School from 2008 to 2010, although no specific degree or field of study is mentioned for this period.