Hello.
I am a senior web developer and very confident about your project.
I an developing web sites for many years and it is not a problem at all to maintain a existing web site.
I can help you with high quality of my work and best result for you.
My Skills are Symfony 4, CI, Laravel, Wordpress(PHP frameworks) and Node.js(full stack backend), Angular(1, 2, 4, 5) Typescript, React.js for front-end.
And also I'm a full-time freelancer, works more than 70 hrs/week.
I'm very familiar with GitHub and GitLab.
And I mastered Html5, CSS, Bootstrap, SASS, of course.
I hope we can discuss via chat.
Best regards.