* Developed Makina Application Framework using micro-kernel architecture to support diverse customer needs.* Built a team of seven for new ML service.

* Prepared to create a new ML service team.* Established identity, mission, and purpose for the team.

* As a Co-founder, built a backend system of crowd-sourcing based AI data labeling platform from scratch.* Built and managed a software engineering team of 15+ members, and coached and mentored them to improve their competencies and grew engineering culture.

* Developed and maintained a backend API server of OGQ Backgrounds HD mobile app with 100 million downloads and 200k+ daily active users.* Built large-scale web service Infrastructure on AWS using Opsworks, RDS, S3, IAM, Route53, ELB.* Built and managed startup dev team with focus on backend server development.* OGQ received $7.5m investment from Naver eight months after my departure.

* Managed SW development team by Agile principle (SCRUM / XP)* Designed and developed data analysis platform* Aligned software product lines which was scattered* Led several data analysis projects as a project manager

* Led several data analysis research projects with SNA (Social Network Analysis) methodology* Developed tens of social network analysis algorithms based on academic papers* Designed and developed a data analysis engine with python similar to current R or Jupyter environment that builds SNA data pipelines with ease