Hi, JungHyun
nice to meet you, I just read your description and then I understood what you need, you want to improve your sites. all of the three websites are yours? that's very great! I have good experience in the wordpress, php, html, Node.js, Angular.js,etc.
I have mastered full stack from Mean stack so far. so I thought I can help you to upgrade and improve your current sites to be professional and fashion graphic design & features with my best. I look forward to work with you for a longterm and with friendship, I will help you as a master in the web field. Thanks so much for your checking my proposal.