Principal Quality Engineer

Role overview Lead the strategy and technical design of automated quality engineering for software spanning APIs, SDKs, mobile apps, payment terminals, and middleware. The work combines hands-on framework development with cross-team guidance, mentoring, and quality leadership for transaction-critical systems.

Responsibilities - Build scalable automated test frameworks and suites across unit, integration, API, UI, end-to-end, and regression testing. - Set automation standards and roadmaps, and integrate tests into CI/CD pipelines with quality gates, reporting, and coverage metrics. - Turn requirements and designs into risk-based test plans, with particular attention to payment, security, and compliance workflows. - Create test data approaches, simulators, and tools for terminal hardware and third-party integrations; improve test speed, stability, and maintainability. - Lead technical and design reviews, evaluate testing tools including AI-assisted options, and mentor engineers on test design and testability. - Contribute to planning, estimates, and technical decisions across concurrent initiatives.

Requirements - Bachelor’s degree in computer science, engineering, information systems, or a related field. - At least 8 years in software quality engineering or development, focused on test automation; at least 3 years leading automation strategy or architecture. - Strong programming skills in an object-oriented language such as Java, C#, or Python, and experience building automation frameworks from the ground up. - Practical experience with UI or mobile automation tools such as Selenium, Playwright, Appium, or Espresso, and testing REST APIs using JSON or XML. - Experience integrating automated tests into CI/CD, using Git or similar source control, and applying sound software engineering and testing practices. - Strong debugging and root-cause analysis skills, clear English communication, and ability to plan test strategies and manage multiple initiatives.

Nice to have - Payment systems experience, including EMV, P2PE, point-of-sale terminals, peripherals, or kiosk environments; familiarity with PCI/EMV compliance, encryption, privacy, and security testing. - Experience testing devices over TCP/IP, USB, Bluetooth, or serial connections, and building mocks or service virtualization for external integrations. - Performance or security testing with tools such as JMeter, k6, or Gatling; Android or iOS automation; BDD tools such as Cucumber. - Familiarity with Agile methods, CI tooling, coverage and quality platforms, and defect tracking systems. - Use of AI-assisted tools for coding, debugging, reviews, or test authoring, plus experience influencing quality practices across teams.