Vilnius Scala organizer and co-founder of Vilnius JUG. While not shredding on his mountain bicycle, he enjoys speaking about software design, test first techniques and how both things fulfil each other. He blogs at http://pilkauskas.lt. Vaidas has more than 10 years of experience in software development and currently takes Guild Master role of backend engineering team at Wix.com where he tries to influence how engineers design their software. Wix.com is a leading website building platform built by passionate R&D team which enjoys tackling high scale challenges.