TL;DR

Payments Integration Lead (Fintech): Leading critical system integrations for a major payments processing platform migration with an accent on operational stability and technical excellence across authorisations, clearing & settlement, fraud, tokenisation, and reporting. Focus on designing, delivering, and validating system integrations between processor platforms, analysing requirements, and ensuring end-to-end testing and cutover readiness.

Location: London/Hybrid

What you will do

Lead the design, delivery, and validation of system integrations between existing and new cards processor platforms.
Analyze and define integration requirements for real-time and batch flows, covering authorisations, clearing & settlement, fraud, tokenisation, customer servicing, and reporting.
Design and validate interface specifications, messaging formats, APIs, file exchanges, and event flows.
Support integration build and configuration, resolving interface defects, data mismatches, and performance issues.
Ensure end-to-end integration testing, cutover readiness, and operational stability.
Identify and manage integration risks, dependencies, and non-functional requirements such as resilience, latency, scalability, and monitoring.

Requirements

Extensive experience in payment processing operations and system integration.
Strong technical knowledge of authorisation, clearing & settlement, and card-scheme standards.
Previous experience delivering processor migrations or complex platform integrations.
Familiarity with ISO 8583 messaging, APIs, event flows, and file exchange protocols.
Strong problem-solving skills to troubleshoot interface defects and performance issues.
Proven ability to work with both business stakeholders and technical engineering teams.

Culture & Benefits

High impact opportunity to lead critical system integrations.
Competitive daily rate for a 12-month contract.
Work within an equal opportunities employer environment.