Project/Client: Fintech Location: Lithuania (must) Start Date: ASAP Duration: 6-9 months Seniority: Senior Language: English Role Overview: We are looking for a Senior QA Automation / Manual Tester with a proven background in fintech, banking, or payment platforms. The role centers on validating SEPA, SWIFT, and Visa payment flows, including ISO 20022 messaging, 3DS2 authentication, and PCI DSS Level 1 compliance controls. The consultant will work across microservice and API layers, covering end-to-end transaction lifecycle testing, resilience validation, and audit-ready documentation within a complex, regulated payment environment. Key Responsibilities: Test SEPA credit transfer flows, SWIFT MT / ISO 20022 message flows, and Visa card payment flows including 3DS2 authentication. Perform API, contract, schema, and integration testing at the microservice layer, including async / event-driven workflow testing across queues, retries, and DLQ. Execute structured test scenarios across SEPA, SWIFT, and Visa payment workstreams and validate end-to-end transaction lifecycle flows, reconciliation, settlement, and data consistency. Conduct resilience testing including retries, circuit breakers, DLQ, failover, and idempotency validation, as well as performance, load, and stress testing for platform stability. Develop, execute, and integrate automated test suites into CI/CD pipelines. Produce audit-grade test evidence and traceability documentation for PCI DSS compliance. Validate web, mobile, and cross-platform functional consistency and regression coverage. Collaborate with developers, DevOps, and security teams to identify, track, and verify defect resolution. Must-Have Requirements: 5+ years of QA automation experience, with a minimum of 3+ years in fintech, banking, or payment platforms. Strong experience in API testing and microservice integration testing using Postman, REST Assured, or similar tools. Proficiency in Java, JavaScript, or Python for automation scripting and test development. Hands-on experience with automation frameworks such as Selenium, Cypress, or Playwright. Experience integrating automated tests into CI/CD pipelines using Jenkins, GitHub Actions, or equivalent tools. Hands-on experience testing SEPA, SWIFT, and Visa card payment flows including ISO 20022 messaging. Solid understanding of PCI DSS compliance controls, OWASP security concepts, authentication, and encryption validation. Familiarity with AWS environments, including CloudWatch logging, monitoring, and observability validation. Strong understanding of resilience testing concepts including retries, failover, circuit breakers, DLQ, and idempotency. Experience producing structured, audit-ready QA documentation and test traceability evidence. 📩 Ready to Join? We look forward to receiving your application and welcoming you to our team!