Ruby Full Stack/Front-End/Back-End Developers -- 6

We're looking for 2 HIGHLY-PROFICIENT Developers (Front-End/Back-End) or 1 Full-Stack, Ruby-on-Rails developer on an ongoing-as-needed basis. You will work with a team of developers on this project. This contract initially is sorted by tasks/projects but will evolve into ongoing sub-projects. Must be experienced with Javascript, AngularJS, Node.js, React, PostgreSQL. Please note we are creating a web-based Search Tool for large inventory systems.

The project is tracked on Jira, so experience here is a plus.
Willingness to sign an NDA