Loading Time MattersHow Zalando's overall site speed improved by more than 25% in five months Read more...Christoph Luetke SchelhoweVP Product AnalyticsShuhei KagawaSoftware EngineerThorbjoern GrudaDelivery Lead EngineeringJeff CybulskiHead of Lean EngineeringDavid Martin JonesSoftware Engineer Jun 11 2018