Hello. My Experiences. 1. E-Commerce with Magento1&2, shopify, opencart and woocommerce. 1. Development of the Security Gateway which makes dedicated IPSec VPN.(ARM, OpenWrt, MTK762x, Arduino,Raspberry, ubuntu cross complie) 2. Development of the Image Processing Enterprise Tool.(Matching,Classification,Detection,Recognition) 3. Research and development of Deep Learning by using Tensorflow,Keras,Sklearn and so on. 4. Authentication by using SSO and customization Authentication, Authorization and Accounting by using RADIUS&DIAMETER protocol.(FreeRadius, FreeDiameter) 5. IaaS and PaaS construction of Cloud system and automation by using OpenStack,OpenShift,K8S,docker and Jenkins. 6. Cloud Management web hosting system by using Django(python), Codigniter & Laravel (PHP) and Spring(java) Framework.(User & admin portal,Disaster Recovery system,Monitoring & Log management system) 7. Android & iPhone using java,koltin and object C.