Aivars Kalvāns is a developer, software architect, and consultant. He has been using Oracle Tuxedo (formerly BEA Tuxedo) since version 8 in 2003 to develop the Tieto Card Suite payment card system using the C++, Python, and Java programming languages. During his almost 19-year career at Tieto, Aivars has been involved in many projects related to payment card issuing, acquiring, and utility payments through mobile phones, ATMs, and POS terminals.