sar3 (speak [sartrз]) was born around the millenium by Dejan Stojanović (better known as sto), because he needed a branding and vehicle for his part-time job business as web designer and "computer specialist". Since then, hunderds of websites arose, numerous small companies and individuals got their support for Online Marketing and several tools were developed.

For a long time, the plan was to go all-in with the entrepreneurship, but it only became reality in 2018. In 2018 "sar3 Switzerland by Stojanovic aka sto" was registred as sole proprietorship (CHE-157.049.582) and from October 2019 sto become the first full-time employee of the company.

About the Team

The sar3 team consists mainly of sto himself (see details below) and a bunch of developers, designers and web designers in Serbia and North Macedonia. The knowledge and experience includes among others the following themes:

  • Web Design, E-Commerce and Online Marketing
  • JavaScript with the modern frameworks and libraries like react, vuejs, angular, gatsbyjs
  • PHP with CMS knowledge in WordPress and other
  • Infrastructure solutions in the cloud: Google Cloud Platform, Amazone Web Services (AWS), Firebase backends
  • Infrastructure self-managed: Linux Server
  • Software development in Java, Golang, Python and other
  • Monosolutions CMS Platform
  • 3D models creation

The network consists further of photographs, designers and developers in Switzerland.

Dejan Stojanović aka sto

Dejan Stojanović aka sto Bild

Dejan Stojanović (everybody calls him sto) was born in 1978 in Ćuprija, Serbia. Since 1986, he lives in Einsiedeln SZ, Switzerland with interruptions in Basel, St. Gallen, Zürich and Lengnau AG. He is married and has two daughters.


1998 Matura Typus A at Stiftsschule Einsiedeln

1998 - 2001 Human Medicine at the University Basel

2002 - 2004 Business Administration at the University St.Gallen

seit 2006 Computer Science and Information Technology Administration and Management at the FernUniversität Hagen

seit 1998 Autodidact computer science, economy, finance, history and philosophy

Working Experience

2005 Cisco Systems Belfast - Support

2005 - 2006 Allianz Suisse - Insurance Consultant

2007 - 2011 Sunrise Communications AG - Tech Support - Mobile and Internet Support

2011 - 2017 Sunrise Communications AG - Product Manager MVNO - Managing ALDI Mobile and other MVNO in Switzerland

2017 - 2019 Swisscom Directories AG - Product Manager MyWEBSITE - Development and management of the MyWEBSITE product at localsearch.ch

from October 2019 - sar3 Switzerland