Website development

I am looking for a web developer to work on Web portal for Academic Domain. It contains portal like, EBook for Academic Content, Assessment Portal to Assess student, Dashboards for Teacher, Student, Parents and other Stack holders. Projects are ongoing, so there is need of a developer who can work upon new features based on requirement, upgrade existing features, update existing features to resolve bugs. I am looking for an experienced web developer who can understand requirement and with organization to deliver projects to clients on time.