Initial contact was from the in-house recruiter, followed by a coffee meeting with the VP/Engineering. Then there was a delay of a few weeks. Followup was an invitation for me to present the results of my recent work on real-time time-series analytics to the entire company, which I felt was a real honor and allowed me to demonstrate what I had developed and how it could benefit Skytree if I was to work there. The audience was very attentive and questions were insightful and plenty.
My conversations (low-key interviews) with the executives and engineers were enjoyable and very stimulating. I was blown away by the caliber of the people I was introduced to, including Leland Wilkinson the author of "Grammar of Graphics" who is their VP of data visualization, who was basically amazing. Discussions with Alex (founder) were illuminating: he comes across as having a clear vision for where the industry is going, and how Skytree can and will play into the evolution of machine learning for big-data systems over the coming years.
His main point is the "everybody's talking about big data but nobody's doing it ... right" opinion I've heard expressed in various forums. I personally feel Alex has the right approach, and I could easily align with his direction.
The interview was very enjoyable, but the delay in engagement had caused me to engage with another company, and in the end I chose to go with them. Skytree would have been my first choice otherwise.