Nothing about that posting screams phishing or scam. This is very normal for companies trying to keep a low profile before launch. They've provided enough information that would appeal to a candidate interested in machine learning.
* product details : bringing machine learning to the masses...The first application of our technology is to battle fraud online.
* technical details : Our system uses a combination of supervised classification algorithms, anomaly detection, and good ol'-fashioned feature engineering to ferret out the bad guys, all running on top of open-source tools like Hadoop, HDFS, MongoDB, Vowpal Wabbit, and d3.js.
* funding situation : We're fresh out of this summer's YCombinator batch, raised funding from top angel
* team info : Our team includes two former CTOs, the tech lead of Android voice input, and the tech lead of Google's A/B test analysis framework and IP geolocation teams.
If I wasn't already working on something interesting I'd jump on this.