Payments API Redesign & ISO 20022

Overview

Owned end-to-end product lifecycle for ISO 20022 payments modernisation, revamping internal APIs for cross-border payments and building an AI-powered risk platform serving 1M+ customers.

The Challenge

Legacy payment systems needed modernisation to meet ISO 20022 regulatory mandates by 2023, while fraud detection models struggled with latency-accuracy trade-offs.

The Approach

Defined MVP features, authored detailed PRDs and acceptance criteria, and conducted UAT with business stakeholders. Created persona-based launch narratives aligned with customer journeys. Managed trade-offs between latency, accuracy, and cost for ML models.

Key Outcomes

• Ensured regulatory compliance for SWIFT/ACH transactions worth millions daily
• Improved fraud detection accuracy by 15% while maintaining <500ms latency
• Increased approval rates by 22% through credit risk uplift with third-party data
• Accelerated third-party integrations by 40% with standardised API docs and sandbox
• Led 15+ A/B experiments improving B2B engagement by 18%

The Result

Delivered ISO 20022 compliance on time, revamped cross-border payment APIs improving throughput and partner adoption by 35%, and reduced monthly churn by 12% through proactive churn prediction models.