Our Team


Paul Stemmet_Founder and CEO

Paul Stemmet

Entrepreneur and CEO, Paul Stemmet is a Solutions Architect with extensive experience in the digital advertising space. His expertise largely lies in audience building, software development and large system integration.

Lerissa van Schalkwyk

Lerissa van Schalkwyk

Job role

Lerissa currently controls all project activities and opportunities relative to the YAP Engine, including reporting concerns, scheduled software plans, and configuration management.

Career Highlight

Working alongside our development team on YAP’s proprietary Yield Pricing Algorithm that adds sophistication to publisher’s inventory pricing.

Experience

Lerissa has 9 years’ experience in Campaign and Project Management. She was part of the Mxit Business Support team for 4 years coordinating advertising campaigns and for the past 5 years she’s been part of the YAP team.

Kevin Dayton_CTO

Kevin Dayton

As Chief Architect and Developer, Kevin Dayton is responsible for the technology planning and implementation of all software on the YAP Engine. His experience spans over 11 years, working as a specialist in the integration of mobile applications and properties.

Stefan Havenstein

Job role
Data Architect & Senior Software Developer, DMP / Oracle BlueKai expert.

Experience
20 years of professional experience in Software Development, Architecture & Management., most notably medium to large product development, integration and migration projects in the finance, insurance, gaming and advertising sector.

Career Highlight
Head of Software Development (~60 developers), Hypoport AG, Germany (www.hypoport.com). Responsible for development of the EUROPACE marketplace, Germany’s largest platform for mortgages, building finance products and personal loans. The platform is processing an average transaction volume of about €5 billion per month and allows banks, insurers, agencies and other market players to outsource parts of their business processes, gaining significant operational efficiencies and access to a wide rage of business partners .