Sebastien Rousseau

PAYMENTS

Real-time payments

RTP, FedNow, SEPA Instant, UK Faster Payments — instant rail mechanics, liquidity, fraud, and pricing.

3 articles

PAYMENTS & MONEY

Cross-Border 2026: ISO 20022, Open Finance and Tokenised Deposits in Corporate Treasury

Cross-border corporate treasury in 2026 is a multi-rail engineering problem. ISO 20022 is the common grammar, A2A and open finance under PSD3/FiDA are the customer-facing rail, tokenised deposits handle the wholesale settlement leg, and SWIFT still anchors the long tail. The interesting work is in the orchestration layer, not the model.

APPLIED AI

Unveiling a new Cryptocurrency and Faster Payment Solution

The Express Transaction Credits (EXTC) platform was an early-2018 experiment in programmable payments on Ethereum, using ERC-223 smart contracts to enable instant cross-border transfers and atomic payment flows — ideas that decentralised finance later scaled.