About the Reviewers

Ransford Hewitt has over 10 years of experience in the design and development of distributed systems, and specializes in designing and troubleshooting large, high-performance, mission-critical systems built with various middleware technologies. Prior to joining Rogers Communications Partnership, Ransford spent two years as a system integrator, deploying the Amdocs Customer Care and Billing application mostly to large telecommunication companies, and spent another 18 years working with Cable & Wireless specializing in deploying and troubleshooting large, high-speed data communication systems. Ransford is currently a technical manager at Rogers Communications Partnership.

Aivars Kalvans holds the position of Lead Software Architect at Tieto Latvia and is working on the Card Suite payment-card system. Card Suite provides solutions for every single part of the payment-card business—issuing, acquiring, switching and clearing POI management, fraud and dispute management, and u-commerce.

During his career of more than 10 years, Aivars has been involved in a number of projects related to credit card issuing and acquiring utility payments through mobile phones, ATMs, and POS terminals. Aivars has been using Oracle Tuxedo (formerly BEA Tuxedo) since Version 8 in 2003. He enjoys solving both design and technical problems, and likes to work on personal and open source projects in his free time.

Aivars holds a Bachelor's degree in Computer Science from Riga Technical University and a Software Architecture Professional Certificate from the Carnegie Mellon Software Engineering Institute.