SaaS App Functional UX Testing

I need a fresh, systematic look at my SaaS web application so I can release the next build with confidence. The immediate focus is on two areas: • Functionality – please design and run solid unit tests against the existing code-base... (Budget: $20 - $40 CAD, Jobs: AngularJS, API Testing, Ruby on Rails, Selenium, Software Testing, Test Automation, Testing / QA, Usability Testing)