Volume XXXIV — 2026
Filed under Technology · Data · Product
Reach joseph@techmabre.com
SYS · OPERATIONAL · 30+ YRS RUNTIME

Joseph
de Castelnau.

Three decades across Wall Street, Madison Avenue, and Big Data — building products that move markets, move brands, and move the needle on what software can do.

/01

Wall Street

Built infrastructure that powered two percent of every NYSE and NASDAQ trade. Latency down to microseconds. Patent in algorithmic execution. Real money, real risk, real engineering.

/02

Madison Ave

Marketers came for the math. Stayed for the clarity. Built the attribution platform that priced media at the speed of culture — then sold it to Nielsen.

/03

Big Data

Before "data scientist" was a job title, there were warehouses, regressions, and shelves of Bayesian shrinkage. Now it's AI. Same instinct, sharper tools.

0
Years Shipping
0%
Of US Trades Powered
$0M+
Attribution Built
0
Patent Held
EST. MCMLXXXVIII — TOUJOURS EN CHANTIER
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v0.9 · 2026-09-22