Keith Lewis
Managing Member at KALX, LLC
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolKeith Lewis is a mathematician-turned-quant technologist and founder of KALX, LLC, with 14+ years of experience solving "hard messy" problems at the intersection of quantitative finance and software engineering. He built high-performance Excel add-in tooling (xll) to bridge trader workflows and production systems, and has a track record as a hands-on consultant and former Wall Street quant who prefers rolling up his sleeves to deliver auditable results. Keith teaches derivative securities at top schools (Columbia, Cornell, Rutgers, NYU) and authored a masters-accessible proof of the Fundamental Theorem of Asset Pricing, proposing a unified framework for valuing and hedging portfolios of any instruments. Comfortable moving business logic into platform-independent C++, he blends deep math, production-grade engineering, and trader empathy to solve problems others can’t.
14 years of coding experience
11 years of employment as a software developer
MA PhD Mathematics, MA PhD Mathematics at University of Hawaii at Manoa
Github Skills (74)
excel10
xlsx10
vba10
openxml10
xlw10
excel-dna10
computational-finance9
stochastic9
floating9
xll9
neat9
mathematica9
maths9
backpropagation9
stochastic-processes8
Programming languages (7)
Github contributions (5)
keithalewis/xllfloat
Sep 2015 - Sep 2019
An Excel add-in for floating point numbers
Contributions:4 PRs, 34 pushes, 3 branches in 4 years 1 month
floatingpointadd-infloating-pointexcel
keithalewis/fms_iterable
Jan 2021 - Apr 2021
Contributions:35 commits, 63 pushes, 3 branches in 3 months
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