Kelsus knows the Payments industry — both the business and the technology. Kelsus executives’ prior roles include:

  • Business Development Manager and Operations Manager at IP Commerce
  • Director of Integration at IP Commerce
  • Director of Business Development & Merchant Services at Mocapay

We’ve been working with Kelsus over the past two years and could not have had a better experience working with an outsourced vendor. They have delivered quality products on time and under budget every time. Additionally, they have been instrumental in making sure requirements are captured properly and are involved with our team on a regular basis for questions, clarifications, and suggested enhancements for improving our overall delivery process. Kelsus is a key component to our global deliverables and have become a scalable resource I view as part of my own team.

Peter Osberg, Senior Vice President, EVO Payments International

Payment Domain Expertise


  • Payments ecosystem operations: acquirers, issuers, processors, service providers, banks
  • Compliance: PCI-DSS, KYC
  • Protocols: Debit, Credit, EMV, Gift & Loyalty, ACH & eCheck
  • Industry verticals: e-commerce, retail, restaurant, gas, lodging

Technology Expertise


  • Native and hybrid mobile, tablet, and kiosk development
  • Artificial intelligence, machine learning & big data analytics
  • Responsive, mobile-first web apps: Ruby, Angular, React, Node.js
  • Microservices and middleware for transaction processing
  • Hardware card reader integrations (Ingenico, Verifone, Magtek, etc)

Featured Project

EVO Payments

EVO Payments

EVO Payments international is the 4th largest non-bankcard acquirer in North America processing payments for over 160,000 businesses.