I'm writing this small Chrome Extension to help me find jobs I'd be interested in the monthly HN's "Who is Hiring?" thread. I've used React to render the UI that just loads a stripped down version of the posts and look into them by the tags I've chosen. Here's a demo: http://imgur.com/a/CzNSa.

I haven't submitted to the Chrome Web Store yet because of their $5 fee. :P But let me know if you'd be interested and I can share the extension with you :)