Change job listing from Kotlin Engineer to Front End Developer - #262

Changed pages include:

• index.html - view
• 404.html - view
• ai-engineering/index.html - view
• ai-radar/index.html - view
• blog/index.html - view
• careers/index.html - view
• case-studies/index.html - view
• clojure-conj/index.html - view
• clojure-in/index.html - view
• consultation/index.html - view

There are more changes not included in the list