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Engineering & Leadership

About Sebastien Rousseau

Principal engineer building high-assurance, privacy-first financial infrastructure and cryptographic document tooling.

Sebastien Rousseau

Sebastien Rousseau

Principal Financial Systems Architect · 19 Years in Production Banking Infrastructure

Sebastien Rousseau has spent nearly two decades architecting, building, and securing high-volume transaction processing systems, institutional payment rails, and cryptographic protocols across global financial centres.

Background & Pedigree

  • 19 Years in Production Finance: Extensive experience across Corporate & Investment Banking (CIB), SWIFT payment gateways, and clearing networks.
  • Author of Open-Source Financial Tools: Author of Bank Statement Parser, KyberLib (FIPS 203 ML-KEM), hsh, and ISO 20022 message parsers with over 45.7M+ total downloads.
  • Dual Apache-2.0 / MIT Licensing: Committed to sovereign, open, and vendor-neutral financial infrastructure.