Factual’s location platform enriches mobile location signals with definitive global data, enabling personalized and contextually relevant mobile experiences. Built from billions of inputs, the data is constantly updated by Factual’s real-time data stack. We were recently named one of "50 Disruptive Companies in 2013" by MIT Technology Review. We have a terrific team that is still fairly small and an incredible CEO who was previously the co-founder of Applied Semantics (which was bought by Google and became AdSense). Factual has venture funding from Andreessen-Horowitz and our partners/customers include Facebook, Yelp, Trulia, and Newsweek.
There are many challenging problems to work on at all layers of the stack: data cleaning and canonicalization, storage, deduping, serving, APIs, improving data using machine learning, etc. A great example is one of our most recent products, Geopulse Audience, which stands at the intersection of high quality places data and large scale analysis of user geo-data: http://www.factual.com/products/geopulse-audience . If you love data, Factual is the place to be. Our main criteria are that you're smart and get things done, but you'll get bonus points for experience with Clojure (http://www.factual.com/jobs/clojure), machine learning, NLP, algorithm design, or Hadoop.
You can email me personally at jake@factual.com, or view our job postings and apply directly via Jobvite:
Los Angeles/SF Bay Area Software engineer: http://hire.jobvite.com/j/?cj=oQR1Vfwn&s=Hackernews