Wordpress Website Customization Work

I've purchased a Job Portal Wordpress theme on which I seek customizations of below nature & scope: 1. CSS: - In the header section, 'Logo & Company name' are overlapping & getting off the view on mobile devices. Although, it is rendering properly on PC/Laptop display screens. - Alignment problem in only Recaptcha row on contactform7 plugin form. 2. Functionality: - Enable multiple selection in a form's textbox field. The textbox is used to autoload/search locations via google location api. Minor change in database query could be required to present search results based on multiple selections, rather than just 1 selection (as is currently the case). - Enable multiple selection in a form's dropdown menu and modify the respective database query accordingly. - In a dropdown menu textfield, populate dropdown menu options from the existing backend table. Currently, I've hard coded the option list in php file. - Create a new widget location, which should be configurable (as in to add text & widgets) from the admin panel. - There are few pages on which data from the user is collected via forms. The issue is that for few form fields which have multiple selected values (eg. via checkbox menu...can be viewed via admin panel), only single value is getting displayed in the frontend. I want all the comma separated values to be displayed. Minor changes in database query could be required. - Configure oAuth settings for 'Apply with Linkedin' and Login via Facebook, Google Plus feature. Desired access passwords will be provided. - Display Loggedin user name besides Logout button on the top menu bar. - Add 2 new fields to the Employer's Registration Page and the same should update the database relevant table/s. In your bid, please also include why you are a good fit to meet our requirements. We wish to establish long term relation with a reliable & efficient freelancer as the overall scope of the project is on-going i.e. we'll publish our customization requirements from time-to-time. Thanks,