Senior Quality Assurance Engineer – Cards Acquiring; E2E

We are seeking a highly skilled Senior Quality Assurance Engineer with deep hands‑on experience across the Cards Acquiring end‑to‑end lifecycle. The ideal candidate will bring strong domain knowledge in merchant onboarding, authorizations, PoS device testing, clearing & settlement, and disputes/chargebacks. This role requires a proactive mindset, strong testing discipline, and the ability to collaborate effectively with international teams in a fast‑paced, regulated payments environment.

• End-to-End Cards Acquiring Testing
  • Lead and execute comprehensive E2E testing across the Cards Acquiring domain.
  • Validate merchant onboarding workflows, including:
    • Front‑end onboarding journeys
    • AML/KYC validation processes
    • Fraud rules verification
  • Perform detailed testing of authorisation processing, including working with ISO 8583 messages across different transaction flows.
  • Conduct functional and regression testing on PoS devices (PAX, Clover, or equivalent terminals).
  • Validate clearing and settlement processes, including:
    • Backend file validation
    • Transaction matching and reconciliation
    • Fee and charge calculations
  • Manage testing scenarios related to disputes and chargebacks, ensuring accurate impact assessment for both acquirers and issuers.
• Testing Strategy & Methodology
  • Drive and uphold strong QA processes, best practices, and documentation standards.
  • Apply risk‑based testing principles to prioritise coverage effectively in complex payment ecosystems.
  • Develop detailed test plans, test cases, and defect reports ensuring traceability to business and technical requirements.
  • Perform root‑cause analysis and support defect triage with engineering and product teams.
  • Contribute to continuous improvement of testing frameworks, tools, and automation strategy.
• Collaboration & Stakeholder Engagement
  • Work closely with global engineering, product, compliance, and operations teams to ensure high‑quality delivery.
  • Participate in Agile ceremonies and promote a quality‑first mindset across the development lifecycle.
  • Provide mentorship and guidance to junior QA team members.

• Knowledge of regulatory requirements related to card payments (PCI‑DSS, AML, etc.).
• Solid understanding of QA methodologies, risk‑based testing, and SDLC.
• Excellent analytical, communication, and problem‑solving skills.
• Exposure to Cards Issuing functionalities.

• Strong hands‑on experience in Cards Acquiring systems and payment processing.
• Experience collaborating with multi‑country or global delivery teams.
• Experience with test automation frameworks or performance testing tools.
• Proven experience testing:
  • Merchant onboarding workflows
  • PoS devices (PAX, Clover, or similar)
  • ISO 8583 authorization flows
  • Clearing & settlement backend processes
  • Disputes and chargebacks

• Must be able to work on‑site

• Collaborative working environment – we stand shoulder to shoulder with our clients and ourpeers through good times and challenges
• We empower all passionate technology loving professionals by allowing them to expand their skills and take part in inspiring projects
• Expleo Academy - enables you to acquire and develop the right skills by delivering a suite of accredited training courses
• Competitive company benefits
• Always working as one team, our people are not afraid to think big and challenge the status quo

• Ensure our recruitment process is inclusive and accessible
• Communicating and promoting vacancies
• Offering an interview to disabled people who meet the minimum criteria for the job
• Anticipating and providing reasonable adjustments as required
• Supporting any existing employee who acquires a disability or long term health condition, enabling them to stay in work at least one activity that will make a difference for disabled people

We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age.

We treat everyone fairly and equitably across the organisation, including providing any additional support and adjustments needed for everyone to thrive.