Sr Software Testing Engineer Jobs (NOW HIRING)

Unissant, Inc. delivers innovative capabilities to the agencies that keep our nation healthy and safe. We apply our domain expertise, data acumen, and technology know-how to achieve breakthrough results for our clients. Working collaboratively, we advance missions and careers through a focus on honesty, integrity, and dependability. We continuously look for talent, excited to join that effort. To learn more about our exciting organization, please visit us at www.unissant.com .

We are seeking a Senior Software Automation Testing Engineer to join our team and support our client in Ashburn, VA. The ideal candidate will bring strong expertise in end-to-end software testing, automation framework development, and Python-based engineering to help improve application reliability and delivery quality. This role is well suited for a technically driven professional who can build internal tools, strengthen automated testing capabilities, and work across teams to deliver scalable, efficient testing solutions in an Agile environment.

• Design, develop, and maintain robust, scalable, and secure Python-based applications that support testing and automation objectives.
• Partner with UI, services, API, and systems engineering teams to translate business needs into practical technical solutions.
• Build internal automation tools and workflows that improve team collaboration, streamline repetitive tasks, and support defect identification.
• Take ownership of the automated testing codebase and support its ongoing enhancement and maintenance.
• Develop automation test scripts and execute regression, functional, and system testing activities.
• Validate results and prepare test summaries, defect reports, and supporting documentation.
• Generate test data and perform data validation to support comprehensive testing efforts.
• Test data interface messaging using JSON and XML message structures.
• Develop SQL and Unix-based scripts to support test data preparation and test harness automation.

• Five (5) or more years of relevant experience in software testing, automation engineering, or related technical work is required.
• Bachelor's Degree in Computer Science or a related field is required.
• Strong understanding of modern Python 3.8+ programming.
• Experience with Python web frameworks such as FastAPI, Django, or Flask.
• Strong background in software testing, including testing REST APIs and end-to-end workflows.
• Experience working in AWS cloud environments.
• Demonstrated ability and interest in automating repetitive tasks and improving engineering efficiency.
• Familiarity with Python testing frameworks such as pytest or unittest.
• Familiarity with automation tools such as Locust.
• Knowledge of version control systems and CI/CD tools such as GitLab, Harness, or Jenkins.
• Experience with Oracle or PostgreSQL databases and strong SQL skills.
• Strong analytical, troubleshooting, and collaboration skills.

• Bachelor's Degree in Computer Science or a related technical field is required.
• Equivalent combination of education and experience may be considered in lieu of strict degree requirements, based on client standards.

• Relevant certifications in software testing, cloud platforms, automation, or DevOps are a plus.
• Additional technical certifications may be considered based on program needs.

• Excellent verbal and written communication skills, including the ability to document findings, explain defects, and collaborate across technical teams.
• Ability to communicate effectively with stakeholders across varying technical skill levels.

• Ability to obtain and maintain a Public Trust position and favorable suitability determination based on a CBP background investigation is required.

• This is a hybrid position based in Ashburn, VA, with onsite support expected one to two days per week and additional onsite presence as required by mission needs.
• Mainly a routine office environment.
• May be required to lift up to ten (10) pounds.
• Flexible in working extended hours.

The above statements are intended to describe the general nature and level of work being performed by the individual(s) assigned to this position. They are not intended to be an exhaustive list of all duties, responsibilities, and skills required. Unissant management reserves the right to modify, add, or remove duties and to assign other duties as necessary. In addition, where applicable and available, reasonable accommodation(s) may be made to enable individuals with disabilities to perform essential functions of this position.

Please note: Candidate(s) will be required to go through pre-employment screening.

Unissant, Inc. is a proud Equal Opportunity Employer! (EOE; M/F/Disability/Vets)