Recruiter contacted over LinkedIn. Later received a call from her and scheduled my first round of interview with their Sr. Director of engineering.
I came to know that this position is for ZapLabs which Realogy acquired some years back.
It was an hour long interview. Initially all seem to be going well while discussing my past experience but as the interview progressed it felt my interviewer was more interested in knowing the complete architecture, design and how exactly the set up is in my current organization. I am not sure if he was trying to interview me or get idea for his project. As per his last comment, I was good technically but he wanted me to take another round of programming interview. He or recruiter never reverted back on next steps.