QA Engineer – ATM Acquiring, Payment Processing

Jobtailor; Deutschland; Remote; EUR 65.000 - 95.000; Vollzeit

Zusammenfassung

Jobtailor, a German fintech QA specialist, is seeking a QA Engineer/SDET to validate end-to-end payment processing, ISO 8583 messages, and API flows across acquiring and settlement.

You will design and execute automated and manual tests, coordinate UAT, certification, and release, and document defects while collaborating with cross-functional teams.

Qualifikationen

• 3+ years of experience as a QA Engineer, QA Automation Engineer, or SDET within fintech, banking, or payment processing
• Experience testing complex system integrations, ideally involving processors, switches, payment networks, or ATM, POS, and e-commerce acquiring
• Knowledge of ISO 8583 and the payment transaction lifecycle, including authorization, reversals, reconciliation, clearing, and settlement
• Understanding of UAT and certification processes within payment systems
• Strong hands‑on experience with API testing and test automation tools
• Strong SQL skills for transaction investigation, data analysis, and validation
• Experience with integration, regression, end‑to‑end, and release testing
• Familiarity with GitLab, GitOps practices, and CI/CD pipelines
• A structured approach to testing and the ability to take full ownership of quality‑related tasks
• English proficiency at B2 level or higher, with effective written and verbal communication skills
• Strong understanding of acquiring, payment processing, and the issuer–acquirer–scheme model
• Hands‑on experience with HSM, Remote Key Loading, or core banking integrations
• Experience with performance and load‑testing tools
• Familiarity with microservice architectures, AWS, EKS, and production monitoring
• Experience conducting certification testing for Visa, Mastercard, BancNet, or other payment schemes
• Experience testing ATM, POS, or e-commerce acquiring solutions

Aufgaben

• Test end-to-end payment processing flows across APIs and ISO 8583 messages, including authorizations, reversals, error handling, reconciliation, clearing, and settlement
• Run manual and automated testing across the processing platform, ATM middleware, HSM/RKL, acquiring, anti-fraud, and core banking integrations
• Support UAT, payment scheme certification, release validation, and post-release monitoring
• Design, maintain, and execute test cases for functional, integration, regression, certification, and release testing
• Validate transaction flows, business rules, message fields, response codes, data consistency, and failure scenarios
• Build and maintain automated tests for APIs and other suitable parts of the processing platform
• Prepare structured test plans, test documentation, and traceability to business and payment scheme requirements
• Coordinate UAT and certification testing with the external processing vendor and payment schemes
• Document defects clearly, verify fixes, and identify root-cause patterns across transaction processing flows
• Manage testing activities from initial planning through release and certification sign-off
• Maintain test tasks and documentation in Jira and Confluence
• Collaborate closely with development, infrastructure, security, compliance, and operations teams
• Monitor production stability after releases and support transaction and incident investigations

Kenntnisse

API Testing

ISO 8583 Knowledge

SQL Skills

Test Automation Tools

UAT Coordination

Tools

Jira

Confluence

GitLab

CI/CD Pipelines

AWS

EKS

Jobbeschreibung

• Test end-to-end payment processing flows across APIs and ISO 8583 messages, including authorizations, reversals, error handling, reconciliation, clearing, and settlement
• Run manual and automated testing across the processing platform, ATM middleware, HSM/RKL, acquiring, anti-fraud, and core banking integrations
• Support UAT, payment scheme certification, release validation, and post-release monitoring
• Design, maintain, and execute test cases for functional, integration, regression, certification, and release testing
• Validate transaction flows, business rules, message fields, response codes, data consistency, and failure scenarios
• Build and maintain automated tests for APIs and other suitable parts of the processing platform
• Prepare structured test plans, test documentation, and traceability to business and payment scheme requirements
• Coordinate UAT and certification testing with the external processing vendor and payment schemes
• Document defects clearly, verify fixes, and identify root-cause patterns across transaction processing flows
• Manage testing activities from initial planning through release and certification sign-off
• Maintain test tasks and documentation in Jira and Confluence
• Collaborate closely with development, infrastructure, security, compliance, and operations teams
• Monitor production stability after releases and support transaction and incident investigations

Requirements

• 3+ years of experience as a QA Engineer, QA Automation Engineer, or SDET within fintech, banking, or payment processing
• Experience testing complex system integrations, ideally involving processors, switches, payment networks, or ATM, POS, and e-commerce acquiring
• Knowledge of ISO 8583 and the payment transaction lifecycle, including authorization, reversals, reconciliation, clearing, and settlement
• Understanding of UAT and certification processes within payment systems
• Strong hands‑on experience with API testing and test automation tools
• Strong SQL skills for transaction investigation, data analysis, and validation
• Experience with integration, regression, end‑to‑end, and release testing
• Familiarity with GitLab, GitOps practices, and CI/CD pipelines
• A structured approach to testing and the ability to take full ownership of quality‑related tasks
• English proficiency at B2 level or higher, with effective written and verbal communication skills
• Strong understanding of acquiring, payment processing, and the issuer–acquirer–scheme model
• Hands‑on experience with HSM, Remote Key Loading, or core banking integrations
• Experience with performance and load‑testing tools
• Familiarity with microservice architectures, AWS, EKS, and production monitoring
• Experience conducting certification testing for Visa, Mastercard, BancNet, or other payment schemes
• Experience testing ATM, POS, or e-commerce acquiring solutions

Core Competencies

Demonstrates expertise in end‑to‑end payment processing, including testing APIs and ISO 8583 messages, while ensuring quality through structured test plans and documentation. Proficient in collaborating with cross‑functional teams to validate transaction flows and support UAT and certification processes.

Highest‑signal resume keywords

• API Testing
• ISO 8583 Knowledge
• SQL Skills
• Test Automation Tools
• UAT Coordination

ATS Optimization Keywords

Hard Skills

• End‑to‑End Testing
• Integration Testing
• Regression Testing
• Release Testing
• Performance Testing
• Load Testing
• Data Analysis
• Transaction Validation
• Defect Documentation
• Root‑Cause Analysis

Soft Skills

• Effective Communication
• Structured Approach
• Ownership of Quality

Industry Keywords

• Fintech
• Payment Processing
• Banking
• UAT
• Payment Scheme Certification
• Acquiring Solutions
• ATM Middleware
• Core Banking Integrations
• Issuer–Acquirer–Scheme Model
• Transaction Lifecycle

Tools & Technologies

• Jira
• Confluence
• GitLab
• CI/CD Pipelines
• AWS
• EKS