Product innovation

We built COS to handle the next level of scale. Social platforms prove it.

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Joel McCormick, EVP, Chief Technology Officer
July 30, 2026
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2
min read

When word got out that we power finance for social platforms, the first question everyone asked was: how? How does a bank handle that kind of volume?

The honest answer is that we've been preparing for years.

Our approach to scalability is proactive, not reactive. We project total volumes years ahead, and then load-test at that level. This gives us runway to identify fundamental architectural challenges before they matter.

Two years ago, we started stress-testing COS at volumes we projected for 2027 and 2028. We were already planning for a world where our platform would need to process at a significantly greater scale, regardless of who the partner was.

Through this process, we identified a bottleneck in Core Balance Decisioning, the system that determines account balances in real-time. You can't fix that by adding servers. It required a ground-up redesign that took months to rewrite, test and complete.

That's the kind of foundational work that enables us to take on programs at social media scale. For partners, that preparation shows up as speed and reliability when demand is highest. It's a continual process. We're always working to understand how far we can push before we hit the next ceiling.

In late 2025, we shipped High-Performance Core Balance Decisioning.

We also built an integration with IntraFi's Omni Sweeps program to manage deposits and compliance at significantly greater volume. When you're talking about this many accounts, you need infrastructure that handles the regulatory side as cleanly as the technical side.

COS is our proprietary banking platform. Since we built it in-house, every line of code, architecture decision and deployment lives at Cross River.

That matters more than people realize, and it's why some of the biggest brands in the world come to us. We built COS ourselves and we understand its architecture deeply. That institutional knowledge is why we can move fast for our partners when it counts.

We're still pushing. The work doesn't stop. We’re always asking where the next ceiling is, and how to be ready before we reach it.

What’s the real lesson here? It’s that in financial infrastructure, real scale is earned well before it’s visible.

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