Sebastien Rousseau

Sebastien Rousseau

Shaping the Future of Banking and Financial Services through Strategic Integration of Artificial Intelligence, Post-Quantum Cryptography & Blockchain Technology

20 Years in payments and banking tech
73 Sigstore-signed research articles
168k Open-source downloads (PyPI · crates.io)
FIPS 203 NIST track · ML-KEM implementation

The work

Payments that move trillions, infrastructure that has to be right.

Senior payments leader at HSBC Commercial & Investment Bank, working on Treasury APIs, Banking-as-a-Service, and the ISO 20022 wholesale rails that settle correspondent payments at scale.

Twenty years across Tier-1 banks (HSBC, PayPal, Barclays) and consumer technology (Shazam, AKQA, Virgin) — the same product-engineering discipline applied to retail, wholesale and now post-quantum.

See the case studies ›
Portrait of Sebastien Rousseau

The research

Banking research, signed and dated. Every article verifiable.

Applied AI, ISO 20022, post-quantum cryptography. Every piece written for senior architects and CTOs who need to make architectural calls — not press releases.

Cited in the EPAA Quantum-Safe Payments white paper (Sept 2025). Editor of Banking On Quantum and Banking On AI. Member of the EPAA Quantum-Safe Cryptography Working Group.

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Quantum computer room with cryogenic dilution refrigerator — symbolising post-quantum cryptography research and banking infrastructure

The output

Open source the standards bodies and lab evaluators can actually read.

KyberLib — production-grade ML-KEM in Rust, evaluated by Qtonic Quantum Lab, adopted by QGram.

pain001 — ISO 20022 payment-file automation. BankStatementParser — unified transaction intelligence. CloudCDN — AI-native edge blueprint.

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Earth from space at night, city lights tracing global financial corridors — symbolising open-source infrastructure shipped across regulated markets

Trusted across

Where to next

Pick the surface that fits your question.

Research notes

Read the articles

73 signed, dated pieces on applied AI, ISO 20022, and post-quantum cryptography.

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Proof

See the case studies

Five evidence-first builds, every metric verifiable without going through me.

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Conversation

Get in touch

Consulting, speaking, advisory. Tier-1 banking technology engagements only.

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Identifiers, credentials & bot policy
ORCID iD
0009-0005-1434-284X
GitHub
github.com/sebastienrousseau
LinkedIn
linkedin.com/in/sebastienrousseau
Working group
Emerging Payments Association Asia · Quantum-Safe Cryptography Working Group

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