Building data processing applications in Scala: the Snowplow experience
I'm the co-founder and tech lead at Snowplow Analytics, the open source web and event analytics platform (https://github.com/snowplow/snowplow). Snowplow is almost exclusively written in Scala, using a range of technologies including Scalaz, Scalding and Spray. I spend a lot of time working with distributed systems (historically Hadoop, increasingly Kinesis, Kafka et al) to deliver really scalable event stream processing. I'm also the author of Unified Log Processing from Manning Publications (http://manning.com/dean/).