Hello. My Experiences. 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. Customization of Odoo, ERP Next and Buterfly for the dedicated purpose. 7. 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) 8. Reverse Engineering(all kinds of DLL,SO file) 9. Android & iPhone using java,koltin and object C.