• Developed a financial backend service in a 10+ engineers agile team using high-collab. approaches like remote pair programming • Migrated & deployed a distributed system to be production ready on AWS EKS with minimal downtime of 4 minutes • Proposed solution architectures, provisioned infra. & CI/CD pipelines for 8+ services on 10+ different AWS services managed by Terraform • Served as team lead administrator of AWS; conducted investigations & resolved 4+ production incidents for multiple teams

• Integrated internal intelligence API services using GraphQL and Kubernetes for ~400 engineers and threat researchers in threat hunting • Moved an on-promise system to AWS. Built containerized scalable deployment with AWS Fargate & CDK which reduced ~20% of cost • Served as team lead administrator of Kubernetes on AWS; operated 3 clusters & 10+ production workloads • Introduced IaC tool AWS CDK to our team; provisioned 4 system infrastructures that consist of 6+ different AWS services like AWS Glue, Step Functions & RDS • Optimized CI/CD pipelines for 6+ projects using prebuilt images, caching & parallelism; adopted conventional commits & semantic versioning that reduced up to 75% of deployment time

• Designed & implemented scalable systems with Google App Engine & Cloud Scheduler that served 250+ concurrent users and above 500 QPS • Served as tech lead & system architect of 4 web-based game projects that generated revenue of over 1 million for the company in 7 months • Focused on backend development with Node.js & MongoDB; cooperated with frontend engineers to design state management with React Redux; set up frontend build system with Webpack, Babel & Gulp • Adopted agile development with unit testing & integration testing using ESLint, Mocha & Travis CI with 83% of code coverage