Senior Terminal QA and Certification Test Engineer

Responsibilities

• Define and execute risk-based test strategies for payment terminal software releases
• Develop and maintain reusable regression test suites beyond certification scripts
• Perform integration and end-to-end testing across terminal, host, and gateway components
• Execute and support scheme-based, network-based, and acquirer-specific certification testing
• Analyze logs, traces, and protocol-level data to troubleshoot terminal and integration issues
• Act as a quality gatekeeper by enforcing release readiness criteria and transparent reporting
• Partner with developers to improve terminal software quality, robustness, and testability

Requirements

• Bachelor’s degree in Computer Science, Engineering, or equivalent practical experience
• 7+ years of QA/testing experience with ownership of complex releases
• Hands-on experience testing payment terminals from manufacturers such as Ingenico, Verifone, or PAX
• Strong experience validating terminal software across EMV chip, contactless/NFC, mobile wallets, and MSR payment flows
• Experience testing terminals across Linux, Windows, and Android operating systems
• Proficiency with connectivity types including LAN, Wi-Fi, cellular/GSM, and Bluetooth
• Strong API, backend, and protocol-level testing skills, including analysis of logs and traces

Preferred Qualifications

• Experience executing multiple types of terminal certifications (scheme, network, and acquirer-specific)
• Strong understanding of QA best practices applied to terminal or embedded software
• Experience building long-term regression strategies to prevent defect recurrence
• Experience automating terminal tests using robotic setups or hardware-in-the-loop testing

About the Company

TNS is a leading global provider of data communication and interoperability services to diverse industries, including retail, banking, payment processing, telecommunications, and financial markets. With employees in 21 countries, we deliver mission-critical solutions to many Fortune 500 companies worldwide.