Build a revamped responsive corporate website

We are looking for a talented Full Stack Engineer cum Designer who can help us revamp our website. Following are the high-level shortlisted features (functional and non-functional) requirements from this website. The new Website will have the following sections:

1. Home Page
2. Services
3. About Us
   1. Case Studies
   2. Team
4. Blog
5. Careers
6. Contact Us
7. Learning
   1. Video Library with embeds from Youtube
   2. Ebooks with an online reader and an option to download (after registration)

Site regions that require dynamic publishing

1. Careers
2. Case Studies
3. Blog

Common concerns:

1. Sitemap
2. Image loading responsiveness and optimisation
3. CSS/JS optimisation
4. Slugs / Social Share Buttons for all
1. Case Studies
2. Blogs
3. Career Posts
5. Google page speed measure for all pages should be 90 or above
6. OpenGraph (FB, Twitter, LinkedIn etc.) for all pages
7. Page Structured-Data schema on all pages
8. SEO Meta Tags including site verification for major search engines
9. Cache busting unique URLs for CSS and JS
10. Google Analytics
11. Provision of pinging search engines (Bing & Google) with updated sitemap whenever the content is added to the site
12. Site links should appear in search results on Google and Bing
13. The site should be responsive to Desktop, Tabs and Mobile

Careers Main Page

1. Jobs listing table with filtering on locations, category, practice and technology
2. Job Details will have
1. Introduction
2. Description
3. Technical Skills
4. Soft Skills
5. Location(s)
6. Type: Full-time, Part-time, Contractual etc
7. Active / Inactive (only active jobs show up)
8. For certain jobs, there will be a set of a questionnaire (test) that plays out asking a series of questions
1. It should also be possible to publish jobs without questionnaire
2. Questions in the questionnaire can be Optional or Required
9. Resume Upload with link to LinkedIn / Medium  / Coderwall / stack overflow / GitHub etc  profile with option to choose which one of these is mandatory
10. Alternatively, the Apply Job Button can also take us to other job board websites as needed

Blog / Case Studies

1. Main page with excerpts
1. Category filter
2. Recent posts first
2. Details Page
1. Content
2. Right Hand Panel with
1. Recent Posts
2. Most active (liked) posts
3. Tag cloud
3. Social Share buttons
4. Comments (with moderation)
5. Likes
3. People can download case studies in PDF format by providing Email ID (company id, i.e. emails ending with public free domain mail server IDs like Gmail or Outlook etc should be disallowed), Name, Company and Designation