KelsusK-watch
Battle-Tested

Proven at Scale

From a SoftBank-funded unicorn to Fortune 500 companies — K-watch's approach has been battle-tested across thousands of integrations.

Featured Case Study

Pax8: 100+ Integrations Over 5+ Years

Pax8 is a SoftBank-funded unicorn that enables managed service providers to sell SaaS solutions like Salesforce, Slack, and Office365 to their customers.

The Challenge

Pax8 needed to rapidly build and maintain integrations with dozens of SaaS vendors — each with different APIs, authentication methods, and licensing models.

The Solution

Kelsus deployed a dedicated team of 8-10 developers who built 100+ vendor integrations and an AI-powered reconciliation engine for automated invoice comparison.

Results

  • 100+ vendor integrations built and maintained
  • 5+ year engagement — longest-serving vendor
  • AI-powered reconciliation engine for billing accuracy
  • Near-zero team turnover throughout the engagement

Technical Stack

AWS-based architecture (ECS, Serverless, Redshift)Node.js, React, micro front-endsAI/embedding/vector databases for invoice reconciliationPod-based scaling: senior dev + BA + junior devs per pod
Delivered first vendor integration faster than our team could accept it. High quality, exactly what we wanted. Built tools and utilities outside what we delivered to make process more scalable. Don't dictate to them; partner with them. They have smart people.

Dave Hanna

VP of Strategy and Architecture, Pax8

More Proof Points

From Fortune 500 keynotes to App Store launches — our team has delivered at every scale.

Chewy (ZooPix Acquisition)

Sole developer of ZooPix (Instagram for pets). Passed rigorous due diligence from both Chewy engineering and PCW security. Team of 10 developers, multi-region AWS deployment. Continued post-acquisition.

Splunk

Built a capture-the-flag security game for conferences and a sales demo orchestration system. Won a Stevie Award. Bin-packing algorithm saved tens of thousands quarterly on AWS.

EVO Payments

Card reader integrations for chip-and-pin processing. Complex hardware + software integration requiring real-time reliability.

Intel (CES 2016)

Built "Syncphony" software for the CES 2016 opening keynote grand finale. Performers wore Curie chips, translating gestures to music in real-time. Zero room for error.

Sphero (Specdrums)

Built iOS and Android apps for a musical toy. Product sold in every Apple Store worldwide. Passed Apple's quality requirements.

Want Results Like These?

Book a discovery call to learn how K-watch can deliver the same proven approach to your integration portfolio.

For companies with 10+ integrations