About Harmonic

Built by practitioners

Harmonic was founded by a team with over 85 years of combined experience across institutional trading, fintech, and digital assets — with roots at Citadel, Jane Street, Breakwater Trading, and SALT Lending.

Deliver strategy education and execution to digital asset market participants — through proprietary technology built for the speed and complexity of modern digital markets.

We enable superior trade execution, real-time risk management, systematic strategy deployment, and efficient capital solutions — reducing slippage, latency, and operational risk across every venue.

Core principles
What we stand for

Derivatives Mastery Series

Institutional-grade derivatives education: free weekly market briefs, plus a members' curriculum of nine modules and a capstone and deep-dive lessons, written by practitioners, not educators.

Proprietary technology

C++ co-located execution with 20–30µs tick-to-trade — no vendor dependencies, no shared infrastructure. Every layer owned by Harmonic.

Institutional standards

Built by veterans of Citadel, Jane Street, and top-tier prop trading firms — every layer of the stack meets institutional grade from day one.

The team
85+ years of combined experience

Across institutional trading, fintech, and digital assets

JP
Joe Perry
Built RedSky Financial, acquired by ITG
P3K · Speed Trading · RedSky
Dartmouth Economics
25 years
JT
Jason Thelen
Founder, Endeavor and Breakwater Trading
SALT · Sun Trading · Endeavor · Breakwater
Loyola Finance & Economics
30 years
JS
Justin Serbinski
Institutional derivatives & market making
Cantor Fitzgerald · Sun Trading · Endeavor · Breakwater
Northwestern Economics
20+ years
FR
Faiz Rasool
Market leader in crypto derivatives volumes
SALT · Jane Street · Citi
Edinburgh Applied Stats MSc
8 years
JD
James Deighan
Managing Partner, Highline Sports and Entertainment
Red Bull · PGA Tour · Super Bowl Halftime · Olympic Games
20+ years
AK
Adam Krauszer
Founded Citadel's institutional algo business
P3K · BNP Paribas · Citadel
Cornell CS Masters
20 years