Senior QA Engineer - Automation & API Testing

Quantum Technologies. LLC; Dallas (TX); On-site; USD 85,000 - 121,000; Full time

Job summary

Quantum Technologies. LLC is seeking a QA Engineer to ensure quality and performance across web, mobile, and API-driven applications.

The role emphasizes manual and automated testing, defect management, and collaboration with cross-functional teams in a dynamic environment. The ideal candidate has 5+ years in QA, hands-on testing with Selenium/Cypress/Playwright, API testing experience, and strong SQL skills.

Qualifications

• 5+ years in software quality assurance and testing.
• Hands-on experience with functional, regression, integration, and end-to-end testing.
• Experience with automation tools such as Selenium, Cypress, or Playwright.
• Experience in API testing using Postman, REST Assured, or SoapUI.
• Knowledge of SQL for backend/data validation.
• Familiarity with Agile/Scrum and CI/CD processes.
• Excellent communication and collaboration with technical and business teams.

Responsibilities

• Develop comprehensive test plans, scenarios, cases, and data.
• Execute manual and automated tests across web, mobile, and API-driven apps.
• Perform functional, regression, integration, smoke, and end-to-end testing.
• Identify, document, track, and manage defects using Jira/ALM or similar tools.
• Collaborate with developers to reproduce defects and verify fixes.
• Conduct API testing to validate structures, status codes, and data accuracy.
• Execute SQL-backed database testing for backend data validation.
• Develop and maintain automated test scripts using Selenium, Cypress, Playwright or similar.
• Participate in Agile ceremonies and release planning.
• Prepare test execution reports and quality metrics for stakeholders.
• Support UAT and coordinate with business users to validate readiness.
• Ensure testing deliverables meet quality standards before production.

Skills

Manual testing

Test planning

Defect management

Automation testing

API testing

Communication

Collaboration

Education

Bachelor's degree in Computer Science / IT / Software Engineering

ISTQB CTFL certification

CSTE certification

Tools

Jira

Zephyr

TestRail

HP ALM

Quality Center

Azure DevOps

Selenium

Cypress

Playwright

TestNG

JUnit

Cucumber

Postman

REST Assured

SoapUI

Swagger

SQL

Appium

JMeter

LoadRunner

Jenkins

Git

GitHub

GitLab

Job description

Quantum Technologies. LLC is seeking a QA Engineer to ensure quality and performance across web, mobile, and API-driven applications.

The role emphasizes manual and automated testing, defect management, and collaboration with cross-functional teams in a dynamic environment. The ideal candidate has 5+ years in QA, hands-on testing with Selenium/Cypress/Playwright, API testing experience, and strong SQL skills.