tech stack:os: centos, alpine, mac, windowsdatabase: postgresql, mongodbscript: shell script, batch, maxscript, action script, nsis scriptgraphic programming: opengl, directxapp programming: java, c/c++, c#, visual basic, groovy, python, unityweb programming: html, jquery, java script, php, laravelload balancer/proxy: aws elb, nginx, openvpnconfiguration tools: ansible, salt, chefevent stream system: rocketmqci/cd: aws codepipeline, github action, drone, jenkins(declarative & scriptable pipeline)aws: vpc, ec2, sg, rds, elasticache, waf, api gateway, lambda, cloudfront, route53, transit gateway, traffic mirror, opswork, iam, secret manager, certificate manager, athena, site-to-site vpn, ecr, kafka, efs, s3, eks, code pipeline, cloudwatch, elbgcp: vpc, gce, firewall, cloudsql, redis, bigquery, pubsub, dataflow, cloud function, gkesource control: codecommit, gitlab, github, svn, perforcecontainer: docker, docker-compose, docker swarmk8s: eks, gke, keda, helm, rancher, argocdiac: cloud formation, terraformmonitor tools: grafana, aws cloudwatch, prometheus/alert manager, elkartifact repository: nexus 3, aws s3testing: locust