THE OPPORTUNITY THAT AWAITS YOU Are you the kind of QA engineer who enjoys digging deep into how payment systems really work — from transaction authorization to settlement — and making sure every step behaves exactly as it should? We’re looking for a Senior QA Engineer who thrives on testing complex payment systems and transaction flows. You’ll join the Card Rails team, ensuring the reliability and quality of the infrastructure that powers card-present (POS) and card-not-present (eCommerce) payments across Africa. This role sits at the intersection of legacy stability and modern automation, where you’ll help shape a shift-left quality strategy, build intelligent test automation, and validate payment lifecycles across acquirers, card schemes, and merchants. If you enjoy breaking systems in smart ways, designing robust testing strategies, and ensuring mission-critical platforms run flawlessly, this role is for you. YOUR KEY RESPONSIBILITIES You’ll design risk-based test strategies for complex payment systems You’ll validate end-to-end payment lifecycles across multiple transaction scenarios You’ll build and maintain automation frameworks and CI/CD test pipelines You’ll test acquirer integrations, payment routing logic, and failover behaviour You’ll collaborate closely with engineers to implement a shift-left quality approach You’ll use logs, metrics, and traces to identify and diagnose transaction issues You’ll help define payment quality metrics such as authorization success rates and failure patterns OUR REQUIRED EXPERTISE Technical Expertise Strong experience in QA / Test Engineering (7–10+ years) Experience testing payments, fintech, banking, or transaction-heavy platforms Deep understanding of card payment flows across card-present and card-not-present channels Hands-on experience testing ISO-8583 message flows Experience with API testing tools (Postman or similar) Automation testing experience with tools such as Cypress, K6, or similar Experience working with CI/CD pipelines (GitLab or similar) Experience testing distributed systems running in cloud environments (AWS preferred) Understanding of EMV transactions and payment device certification is highly advantageous Problem-Solving & Ownership Able to design structured test strategies for complex systems Comfortable validating high-volume transaction platforms Able to investigate complex transaction issues across distributed systems Takes ownership of quality outcomes across the payment lifecycle Collaboration & Communication Works effectively in remote-first engineering teams Collaborates closely with developers, product teams, and external partners Communicates complex technical and quality issues clearlyMentors engineers in quality practices and automation approaches YOUR REWARD A competitive salary (depending on experience in line with requirements) An opportunity to work with one of the fastest-rising payments companies in South Africa. Exposure to working with the latest technologies An opportunity to work from anywhere in South Africa -REMOTE #J-18808-Ljbffr