Business Analyst – Card Integrations

Business Analyst – Card Integrations

Location: London (Hybrid – 2–3 days per week in office)
Duration: 6-month initial contract
Rate: £550–£600 / day (Inside IR35)

We’re supporting a well-established UK financial services organisation on a major card platform transformation and are looking for an experienced Business Analyst with strong integration expertise to join the programme.

This is a significant, multi-year initiative replacing an existing third-party card platform with a new cloud-based solution. The programme will modernise debit and credit card capabilities and re-integrate core payment services across a complex internal systems landscape.

It’s a high-impact transformation, involving large-scale system replacement and deep integration across multiple banking platforms.

• Lead requirements definition for card platform integrations across multiple internal systems
• Produce detailed functional and technical specifications, including API documentation (REST/SOAP)
• Define and document As-Is / To-Be processes and conduct gap analysis
• Work closely with architects and engineers to translate business requirements into build-ready artefacts
• Support data mapping, message flows and system interaction design
• Identify integration risks, dependencies and downstream impacts across the payments landscape
• Support migration activity from legacy card systems to the new cloud-based platform
• Contribute to UAT planning, acceptance criteria definition and business readiness activity
• Ensure solutions align with enterprise architecture and regulatory requirements

• Card issuing and processing platforms
• API-led integrations and microservices architecture
• Payment schemes (e.g. Faster Payments, SEPA, CHAPS)
• ISO 8583 / ISO 20022 messaging (desirable)
• Complex, multi-system banking environments

• Proven experience as a Business Analyst within banking or financial services
• Strong integration and API experience – this is essential
• Strong cards domain experience (issuing, processing, or card platform integrations)
• Experience working on platform replacement or large-scale transformation programmes
• Ability to write detailed, technically robust requirements for engineering teams
• Strong stakeholder management across business and technology
• Comfortable operating in Agile and/or hybrid delivery environments
• A pragmatic, delivery-focused mindset with strong attention to detail