Hi, I have experience with REST API and with Wordpress development (theme and plugins), so I am able to add these functionalities to your existing site. I'll need to know how you want to implement every API function, this will help to set the project scope.
About my experience, I can get pixel to pixel photoshop/ai designs into standard w3c html5 or xhtml code with browser compatibility (chrome, opera, safari, ie, firefox, edge, webkit), I work with CSS Grid such as bootstrap or GRID 960 System to get responsive design that will works on all desktop pc, laptop and mobile devices. With code, I have experience with angularjs 8, typescript, material, javascript, jquery, ajax, rest api implementation and more.
In the backend, I have experience with nodejs api applications, python django, react, php mvc frameworks such as codeigniter, laravel, also I can develop plugins and themes with wordpress. With no sql and big data web databases such as mongo, couchdb, cassandra, also with simple mysql or sql server applications (mysql, mariadb, postgresql, oracle, sql server). I can configure linux or windows servers, as well I can work with VPS servers.
Please contact me, thank you.