Sergei Zolotarjov is an accomplished software architect with extensive experience in designing and developing communication technologies. Current memberships include the Estonian Business Angels Network and the European Business Angels Network. Previously at Twilio, Inc. from 2014 to 2022, Sergei defined technology stacks and service protocols for various products. Prior roles at Skype involved architecting calling services and developing backend systems, while significant contributions to Microsoft were made in the same capacity. Sergei led a software development team at FusionOne, Inc. specializing in mobile platforms, and earlier career roles included software development at Siemest Data Ltd. and IT management at Arvotek Ltd.