In the last few years, it became common practice for developers to have an end to end ownership on their features / services. New tools and frameworks are required for enabling developers to develop, test, deploy, monitor their features, while keeping the development speed as is. Our R&D at taboola has more than 250 developers. They constantly push code and want to deploy their services to production. When I arrived to taboola, 2 years ago, one of the first things I noticed is how hard it was to test your service. It requires a new solution that would be dynamic, fast, UX friendly and easy to maintain. In this talk I will present the on demand testing environment concept we built at taboola. with this framework, any developer can start a private environment for him to test in minutes.