\begin{cvitems}% Description(s) of tasks/responsibilities
\item{Built several automated environments to provision and manage a hybrid infrastructure(Amazon AWS + On-premise) utilizing IaC(Infrastructure as Code) tools like Ansible, Packer and Terraform.}
\item{Designed an overall service architecture and pipelines of the Machine Learning based Fashion Tagging API SaaS product with the micro-services architecture.}
\item{Implemented several API microservices in Node.js Koa and in the serverless AWS Lambda functions.}
\item{Built and deployed overall service infrastructure utilizing Docker container, CircleCI, and several AWS stack(Including EC2, ECS, Route 53, S3, CloudFront, RDS, ElastiCache, IAM), focusing on high-availability, fault tolerance, and auto-scaling.}
\item{Lead engineer on agent-less backtracking system that can discover client device's fingerprint(including public and private IP) independently of the Proxy, VPN and NAT.}
\item{Developed in Cocos2d-x an action puzzle game(Dragon Buster) targeting U.S. market.}
\item{Implemented API server which is communicating with game client and In-App Store, along with two other team members who wrote the game logic and designed game graphics.}
\item{Developed a proxy drive smartphone application which connects proxy driver and customer.}
\item{Implemented overall Android application logic and wrote API server for community service, along with lead engineer who designed bidding protocol on raw socket and implemented API server for bidding.}