Thank you for your feedback about your interview experience - we really appreciate hearing from candidates about their experience. We apologize for the delay in communication with regards to your onsite interview. With regards to QA, all of our code must pass through testing before it can be released onto production servers. We are proud of the array of QA testing means that we use for our code. Regarding professional development, we place importance on promoting continued skill development for all of our employees. Our Engineering team is continually learning about and evaluating new technologies (i.e. through tech talks, or conducting hack weeks to cook up amazing new products and to test-drive new tech), and implementing them when it makes sense. As an education technology company, employee education and growth is an important part of our culture. We wish you all the best as you explore your next career move - and thank you again for your feedback!