Sebastien Rousseau is a senior banking technologist with nearly two decades across HSBC, PayPal and Barclays. He turns payments modernisation, post-quantum cryptography and applied AI from policy paper into inspectable code, and into keynotes a board can act on.
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Nearly two decades across HSBC, PayPal & Barclays · Co-author, EPAA quantum-safe white paper · Contributor, Emerging Payments Association Asia
Contributor to the EPAA Quantum-Safe Cryptography Working Group. Co-author of the EPAA white paper "Quantum-Safe Payments: Why the Payments Industry Must Act Now" (September 2025).
Boards and conferences need someone who can hold a room. Newsrooms need someone who can give a clean, accurate quote on deadline. I do both.
Keynotes, panels and workshops for boards, conferences and executive teams navigating payments, post-quantum and AI.
Broadcast-ready commentary on payments, post-quantum cryptography and applied AI, for print, radio, TV and podcasts.
Each talk turns a live industry problem into a decision a room can act on. Every one is tagged for the audience it is written for, and can be tailored to yours.
What the November 2026 CBPR+ structured-address deadline, FIPS 203, and harvest-now-decrypt-later mean for a Tier-1 payments stack, and how to turn migration into a measurable, board-grade engineering programme.
You leave with: a board-ready migration roadmap and the metrics to govern it.
A field guide to building production-grade ISO 20022 automation: structured-address compliance, BAH/head.001 wrapping, BIC/IBAN/LEI checksums, and OpenTelemetry UETR tracing.
You leave with: a concrete engineering checklist for the address deadline.
Why open-source reference implementations beat proprietary black boxes for security, compliance, and supplier risk under DORA, and how to govern them inside a regulated institution.
You leave with: a supplier-risk framework for open-source in production.
Translating cryptographic agility from a project paper into a board-level operational-resilience commitment, using the EPAA framework, NIST PQC standards, and a concrete migration roadmap.
You leave with: the language to brief a board on cryptographic risk.
The five-component control plane that turns autonomous workflows into SR 11-7 / SS1/23 supervisory-ready evidence: OAuth-scoped accounts, deterministic routing, OPA policy gates, immutable WORM audit logs, and a tested kill switch.
You leave with: a control plane your model-risk team can actually sign off.
Every keynote can be re-cut for your institution, your regulators and your migration timeline.
Discuss a custom talkA single, tightly-argued talk built around one decision your audience has to make. Tailored to your stack and regulators.
Moderated or contributing. I bring the technical detail that keeps a panel honest and the plain English that keeps it useful.
Hands-on, board-to-engineering. We leave with an artefact: a roadmap, a checklist, or a reference implementation.
Broadcast-ready commentary on payments, post-quantum cryptography and applied AI. I give plain-English quotes for a general audience, or go as deep as your specialist desk needs.
Sebastien Rousseau is a senior banking technologist focused on the structural transformation of wholesale payments. He has nearly two decades of experience across HSBC Commercial & Investment Bank, PayPal, Barclays, Shazam, AKQA, and Virgin Group. He authors and maintains pacs.008, pain.001, BankStatementParser, KyberLib, CloudCDN, and dotfiles, each positioned as a reference implementation, not a demo: inspectable, board-grade financial infrastructure.
He contributes to the Emerging Payments Association Asia Quantum-Safe Cryptography Working Group, co-authored the EPAA white paper "Quantum-Safe Payments: Why the Payments Industry Must Act Now" (September 2025), and publishes Banking On Quantum and Banking On AI. He works at the intersection of agentic AI, real-time payments, post-quantum cryptography, cloud-native resilience, structured data, and regulatory evidence.
Copy-paste, pre-approved, in three lengths. No back-and-forth.
Sebastien Rousseau is a senior banking technologist who writes and builds at the edge of payments, post-quantum cryptography, and applied AI. Author of open-source libraries used in financial infrastructure; contributor to the Emerging Payments Association Asia Quantum-Safe Cryptography Working Group.
Sebastien Rousseau is a senior banking technologist with nearly two decades across HSBC Commercial & Investment Bank, PayPal, Barclays, Shazam, AKQA, and Virgin Group. He authors open-source Python and Rust libraries that turn ISO 20022 migration, post-quantum cryptography, and applied AI from policy paper into inspectable code. He contributes to the Emerging Payments Association Asia Quantum-Safe Cryptography Working Group and publishes Banking On Quantum and Banking On AI at sebastienrousseau.com.
Sebastien Rousseau is a senior banking technologist focused on the structural transformation of wholesale payments. He has nearly two decades of experience across HSBC Commercial & Investment Bank, PayPal, Barclays, Shazam, AKQA, and Virgin Group. He authors and maintains pacs.008, pain.001, BankStatementParser, KyberLib, CloudCDN, and dotfiles, each positioned as a reference implementation, not a demo, for inspectable, board-grade financial infrastructure. He is a contributor to the Emerging Payments Association Asia Quantum-Safe Cryptography Working Group, co-author of the EPAA white paper "Quantum-Safe Payments: Why the Payments Industry Must Act Now" (September 2025), and publishes Banking On Quantum and Banking On AI. He works at the intersection of agentic AI, real-time payments, post-quantum cryptography, cloud-native resilience, structured data, and regulatory evidence.
Yes. Every keynote is re-cut for your stack, your regulators, and your migration timeline. I will take a short briefing call beforehand so the examples land as your problem, not a generic one.
Vendor-neutral. I do not sell a platform and I do not take the stage to promote one. The open-source work is reference implementation, not a sales funnel. If your audience needs impartial technical judgement, that is the point.
Yes. I am comfortable working under NDA and briefing on confidential migration or risk programmes. Say so in your enquiry and we will handle paperwork before anything else.
I speak in London, across mainland Europe in person, and remotely worldwide. Typical lead time is a few weeks; deadline media comment is far faster. Tell me your date and I will confirm availability quickly.
Fee on request, and it depends on format, location and audience. Reduced or waived rates for standards bodies, non-profits and academic events; mention your context in the enquiry.
For in-person: a confidence monitor, a slide clicker, and a lav or headset mic. For remote: I present from a studio-quality setup with a backup line. Full AV rider available on request.
Tell me about your event. The more you share, the faster I can confirm fit, availability and fee.
Invite me to speakKeynotes, panels and expert comment on payments, post-quantum cryptography and applied AI. In London, across Europe, or remote.