Hugo provides a new command to create a post, as a example for creating a new career page is hugo new career/new-career.md, it will create a post.
Configure Post
You can configure your career from the front-matter. Front-matter starts with --- and end with also --- . In this front matter you can give description = meta description, image = images/career/logo.jpg, bgImage = image.jpg( background image is for page header), JobDetails is a loop, you can add more item with this loop. And apply is for apply url.
When you created a new post, the draft default value is true, and when the draft is true your post will not show, you need to change it for showing this post. like draft = false. Then your post will show in blog page.
After closing front matter give your post content, remember that every file that has an .md extension, are supports markdown.