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Software Test Engineer

Responsible for designing, developing, and executing test plans, test cases, and scripts to ensure software quality and reliability.

  • Chantilly, Virginia, United States
  • Full-time
  • On-site
  • Posted Nov 10, 2026
INDUSTRYSoftware & InternetSaaS & Enterprise Software

Responsibilities

  • Design, develop, and execute test plans, test cases, and test scripts
  • Evaluate test specifications, analyze results, and drive corrective actions
  • Determine optimal testing strategies and integrate customer requirements
  • Develop and maintain comprehensive test plans and scripts
  • Execute manual and automated tests to verify functionality, performance, and security
  • Identify, document, and track defects using issue tracking tools
  • Collaborate with developers to reproduce and resolve defects
  • Perform regression testing
  • Contribute to continuous improvement of testing processes and tools
  • Provide training and mentorship to junior test engineers
  • Participate in project meetings and contribute to planning and risk assessment
  • Stay current with industry trends and best practices
  • Demonstrate advanced technical expertise and provide leadership in testing projects
  • Act as subject matter expert in testing methodologies and tools
  • Mentor and guide junior team members
  • Contribute to strategic planning and process improvement initiatives
  • Engage in client interactions and presentations

Requirements

  • Bachelor’s degree in Computer Science, Engineering, or a related field
  • Experience in a Software Testing

Nice to have: ISTQB Certified Tester, load testing, JAWS, ZAP, Roo Code, DevOps practices, web applications, mobile applications, cloud-based services, performance testing tools, JMeter, LoadRunner

Skills

SeleniumJUnitTestNGmanual testingautomated testingAgile/Scrumsecurity testingJIRAMS TFSSection 508 standardsWCAG 2.0 Level A and AAPythonJavaScriptSeleniumJUnitTestNGJIRAMS TFSPythonJavaScriptJAWSZAPJMeterLoadRunner

Benefits

  • 100% paid Medical, Dental & Vision
  • 6% 401K match
  • 29 Days' PTO
  • Flexible Work Schedule
  • Tuition/Certification Reimbursement
  • Growth Opportunities

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Full description

Seamless Migration is seeking a career and customer-oriented Software Test Engineer, to join our team in Chantilly, VA. Clearance TS/SCI W/ CI Polygraph (existing clearance required to start) Location Chantilly, VA Overview Support our client in Chantilly, VA. This role is ideal for someone who enjoys solving complex challenges, driving quality, and collaborating with a supportive and growth-minded team. As a Software Test Engineer, you will be instrumental in ensuring the quality and reliability of our software products. Design, develop, and execute test plans, test cases, and test scripts to validate software functionality. Evaluate complex test specifications, analyze results, and drive corrective actions to ensure that products meet both technical and contractual requirements. Determine optimal testing strategies for sophisticated systems, identify product characteristics that enhance testability, and integrate customer requirements into practical system-level test solutions. This position demands a deep understanding of software development processes, testing methodologies, and the ability to collaborate effectively with cross-functional teams. Develop and maintain comprehensive test plans, test cases, and test scripts for software applications. Execute manual and automated tests to verify software functionality, performance, and security. Identify, document, and track software defects using issue tracking tools. Collaborate with developers to reproduce and resolve software defects. Perform regression testing to ensure that new changes do not adversely affect existing functionality. Contribute to the continuous improvement of testing processes and tools. Provide training and mentorship to junior test engineers. Participate in project meetings and contribute to project planning and risk assessment. Stay current with industry trends and best practices in software testing. Demonstrate advanced technical expertise and provide leadership in testing projects. Act as a subject matter expert in testing methodologies and tools. Mentor and guide junior team members. Contribute to strategic planning and process improvement initiatives. Engage in client interactions and presentations. Qualifications Bachelor’s degree in Computer Science, Engineering, or a related field. Minimum of 7 years of experience in software testing, with a proven track record of delivering high-quality test results. Strong knowledge of testing methodologies, tools, and frameworks (e.g., Selenium, JUnit, TestNG). Experience with both manual and automated testing. Excellent analytical and problem-solving skills. Strong communication and interpersonal skills. Ability to work independently and as part of a team. Experience with Section 508 standards, which map directly to WCAG 2.0 Level A and Level AA Success Criteria. Experience with Agile/Scrum methodologies. Experience with security testing. Experience with JIRA/MS TFS. Nice To Have ISTQB Certified Tester or equivalent. Experience with load testing. Experience with JAWS. Experience with ZAP (security testing). Experience with Roo Code. Knowledge of DevOps practices and tools. Experience in testing web applications, mobile applications, or cloud-based services. Proficiency in scripting languages (e.g., Python, JavaScript) for test automation. Familiarity with performance testing tools (e.g., JMeter, LoadRunner). Benefits 100% paid Medical, Dental & Vision for Our Employee 6% 401K match (Vested Immediately) 29 Days' PTO Flexible Work Schedule Tuition/Certification Reimbursement Growth Opportunities w/in an Emerging Defense Company *All your information will be kept confidential according to EEO guidelines

Software Test Engineer at Seamless Migration | Referso Jobs