Fix & Extend Existing SaaS Backend API (Node.js) + Add One New Feature

We are looking for a Full Stack Engineer to help us with a small improvement task in our existing SaaS project. We already have a working application built with React and Node.js. We now need a developer to fix a few backend issues and implement a small new feature in our API layer... (Budget: $30 - $250 USD, Jobs: AngularJS, API Development, Backend Development, Full Stack Development, JavaScript, Node.js, PHP, RESTful)