Alex S
Former Owner at iso8583.info
Luxembourg
Summary
👤
Senior🎓
Top SchoolAlex S is a seasoned software engineer and entrepreneur with 12+ years of hands-on experience in payment systems, smartcards, and embedded POS software, currently running niche projects focused on financial data parsing and protocol reverse engineering. He combines deep C/C++ and LuaJIT expertise with practical knowledge of payment standards (EMV, ISO 7816, ISO 8583), contactless schemes (PayPass, PayWave, Expresspay) and a long track record certifying and developing terminal hardware and firmware. Alex prefers building lean, robust tooling—using LuaJIT/FFI and NGINX—to automate research and avoid bloated vendor stacks, reflecting a pragmatic, developer-first approach. His background spans product development, certification management and low-level protocol work across major terminal vendors and certification bodies, giving him rare cross-domain insight from hardware to backend transaction processing. Based in Luxembourg, he runs iso8583.info and cheef.ru, blending consulting, lab research and open-format tooling for financial protocol analysis. Colleagues rely on his analytical rigor and cryptography-aware engineering when solving intricate interoperability and reverse-engineering challenges.
12 years of coding experience
24 years of employment as a software developer
BS Computer Science Faculty of Computational Mathematics & Cybernetics, BS Computer Science Faculty of Computational Mathematics & Cybernetics at State University of Nizhni Novgorod named after N.I. Lobachevsky (UNN)
English, Russian, German, French, LuxembourgishGithub contributions (1)
cheef000/iso8583.info
Jun 2014 - Dec 2014
Contributions:41 commits in 5 months
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