David Schwartz

The technical mind behind one of the world's most efficient payment networks. As the co-creator of the XRP Ledger and Ripple's longtime CTO, he architected a payment network that settles transactions in 3-5 seconds—before most people finish reading this sentence.

13+ Years at Ripple

XRPL Launch 2012

670K+ Followers

The Person

Unlike many cryptocurrency leaders who cultivate mystique, Schwartz has spent over a decade explaining complex technical concepts in public forums, podcasts, and social media as @JoelKatz.

Why He Matters

When Schwartz explains why the XRPL doesn't have smart contracts on layer one, or why validators receive no block rewards, he's not offering opinions—he's explaining decisions he personally made.

A New Chapter (September 2025)

After 13 years at Ripple, Schwartz transitioned to CTO Emeritus and joined the Board of Directors—focusing on hands-on XRPL development and family while continuing to guide Ripple's technical direction.

Career Timeline

2018 - 2025

CTO, Ripple

Led Ripple's technology strategy, oversaw AMM implementation, programmable tokens, and reduced transaction fees.

2012 - 2018

Chief Cryptographer, Ripple

Co-founded the XRP Ledger with Jed McCaleb and Arthur Britto. Designed the consensus protocol that settles in 3-5 seconds.

1998 - 2011

CTO, WebMaster Inc.

Developed encrypted cloud storage and enterprise messaging systems for clients including CNN and NSA.

1988 - 1998

David Schwartz Enterprises

Founded company, invented distributed computing systems, patented hierarchical workload distribution.

What Schwartz Believes

Schwartz repeatedly emphasizes that the XRP Ledger is genuinely decentralized—Ripple cannot control it, reverse transactions, or change rules unilaterally. He argues this is precisely what makes public blockchains valuable to institutions.

"If Ripple could just say, 'This transaction didn't happen,' what would be the point? The whole value proposition is that even we can't break the rules."

Unlike most software that tries to keep running through errors, the XRPL is designed to stop immediately when something seems wrong. Schwartz calls this the 'anti-robustness principle'—when you're handling billions of dollars, it's better to halt than to potentially process corrupted data.

Schwartz believes paying validators creates artificial conflict and races to the bottom (like Bitcoin mining concentration). XRPL validators run nodes because they have skin in the game—exchanges, financial institutions, developers who benefit from a functioning network.

The decision not to add Ethereum-style smart contracts to the base XRPL was intentional. Schwartz argues that layer-one contracts are limited to that chain's resources, can't keep secrets, and create attack surface.

Despite working in crypto for 13+ years, Schwartz isn't a maximalist. He believes DeFi will take 'a huge bite out of TradFi'—but through better versions of services people already want, not through replacing the entire financial system.

"By far the biggest misconception is that Ripple somehow controls the ledger. It's a public blockchain. Every node enforces every rule."

— David Schwartz, Decrypt Interview 2025