Senior Backend Developer for Niche Social Media Platform -- 2

We are building an app a main niche focused social media platform similar to Reddit, centered around communities, discussions, posts, comments, upvotes, follows, notifications, and personalized feeds.... (Budget: $8 - $15 USD, Jobs: AngularJS, API Development, AWS Lambda, Node.js, NoSQL Couch & Mongo, PHP, PostgreSQL, Redis)