As per the Job requirement, I understood that you need an experienced codeigniter developer and as per my past learning experience I have expertise in codeigniter development and have successfully developed around 20+ project in codeigniter development.
Proposed solution:
1) Worked alot with Custom theme as well as have used Ready-made theme from themeforest, elegant, Yoo and Rocket theme.
2) Except custom plugin development, I have worked a lot on popular plugins including Woocommerce, Buddypress, Event Management, File Management, Subscription Management etc.
3) Core competency in slicing PSD to HTML/CSS, HTML5/CSS3/media query, and then integration under wordPress as per the requirement.
4) Good skills in HTML, CSS, HTML5/CSS3/media query, Bootstrap, Ajax and JavaScript/Jquery stuff like custom solution development, slider, text animation and validation.