Esko Lahti is a Principal Consultant at Reaktor since March 2016, previously serving as a Lead Software Architect at Eficode from January 2015 to February 2016, where responsibilities included architectural decision-making and organizing training sessions on new technologies. Prior experience at Elisa from November 2007 to December 2014 encompassed roles as a Software Architect, where Esko designed large SOA-based CRM systems and led development teams, as well as Senior Software Developer, System Designer, and Software Developer, focusing on high availability service systems, CRM integration applications, and full-stack development. Esko holds a Bachelor's Degree in Technology, Communication, and Transport from Metropolia University of Applied Sciences, completed in 2009.