Principal System Engineering
Plano, Texas
Job Description:
This position requires office presence of a minimum of 5 days per week and is only located in the location(s) posted. No relocation is offered.
About The Company:
Join AT&T and reimagine the communications and technologies that connect the world. Our Corporate Systems team delivers innovative and reliable technology solutions that power differentiated, simplified customer experiences. Bring your bold ideas and fearless risk-taking to redefine connectivity and transform how the world shares stories and experiences that matter. When you step into a career with AT&T, you won’t just imagine the future—you’ll create it.
About The Team:
Our External Client Support Team is dedicated to supporting our external clients’ testing needs. We provide comprehensive technical development guidance, data and environment support, and defect troubleshooting to help clients meet their timelines and deliverables. This role partners closely with our Connected Solutions Business Partners to define scope, articulate solutions, engineer testing strategy, and outline timelines. This position is very much hands on – designing and executing E2E testing flows for new projects.
What You'll Do:
- Design, develop, and execute test plans and strategies with external partners.
- Collaborate with Program Managers, Development Leads, and Architects to identify test scenarios.
- Implement and enhance test automation to improve coverage and regression reliability.
- Collaborate in the design phase to detail API flows, data requirements, and client testing plans.
- Coordinate testing schedules with AIMs and clients.
- Set up and validate QA client environments, including SOCs and Dealer Codes.
- Procure, create, validate, and deliver internal QA data to clients.
- Serve as the single point of contact for client issues, providing triage, troubleshooting, tracking, and defect history.
- Support sustainment and regression testing activities for AT&T and client releases.
- Perform environment shakeouts for over 100 APIs before major releases.
- Conduct daily sanity checks for 25+ APIs to ensure continuous testing support.
- Develop data and environment strategies addressing performance, scalability, reliability, and security.
- Report defects, analyze test results, and prepare test metrics and reports.
- Communicate progress proactively through governance calls, stand-ups, reports, and escalations.
- Coordinate across all phases of the Software Development Life Cycle (SDLC) to facilitate certification and production deployment.
What You'll Need To Bring: (Technical Skills)
- Extensive working knowledge of Connected Car Platforms, including interfaces and network components.
- Over 5 years of experience with complex systems integration and data architecture, including CSI, Akamai, TLG API software architecture, REST APIs, SOAP APIs, XML, Postman, and SOAP UI.
- Intermediate to advanced knowledge of test automation tools such as Robot Framework, Playwright, Katalon, and Appium. Additional skills in Power BI, Python, PowerShell, Jenkins, SQL, Oracle, Azure cloud basics, Selenium, and GenAI experience are also considered assets. Proficient in automation testing tools and strategies in integrated test environments.
- Experienced in Playwright, Robot Framework for browser automation and proficiency in Python including frameworks such as Pytest.
- Experience with service virtualization, API automation (REST Assured, Postman, Karate), and contract testing (Pact).
- Experience in integrating automated scripts into CI/CD pipeline using Jenkins, GitHub actions, Azure DevOps.
- Over 8 years of hands-on software quality assurance and testing experience.
- Strong analytical and troubleshooting skills, with a solid understanding of application architecture.
- Experience writing SQL and NoSQL queries.
- Familiar with Agile/SCRUM and DevOps methodologies.
- Experience leading initiatives and mentoring team members.
- Excellent written and verbal communication skills.
- Highly organized, detail-oriented, and able to prioritize multiple tasks effectively.
- Self-motivated, with the ability to work independently or collaboratively.
- Strong client communication and issue resolution skills.
- Experience developing test strategies for external clients.
- Ability to analyze multiple system requirements and generate end-to-end customer-based test cases.
- Experience working with vendors and offshore teams during delivery.
- Experience as a test lead or test architect with responsibility for large-scale projects.
- Familiarity with defect triage and tracking tools.
Nice To Have:
- Background in performance, usability, security, and scalability testing.
- Hands-on programming/scripting experience in Java/Python is an added advantage, but the primary essential coding skill required is Python.
Education:
Preferred Bachelor of Science degree in Computer Engineering, Computer Science, Applied Science, Electrical Engineering, or Math; Developer nanodegree; or equivalent experience.
Experience:
Typically requires 7+ years of related experience. Technical Career Pathway (TCP) role.
Supervisory:
No.
Our Principal System Engineering, earns between $174,100-$261,100 USD Annual, Not to mention all the other amazing rewards that working at AT&T offers. Individual starting salary within this range may depend on geography, experience, expertise, and education/training.
Joining our team comes with amazing perks and benefits:
- Medical/Dental/Vision coverage
- 401(k) plan
- Tuition reimbursement program
- Paid Time Off and Holidays (based on date of hire, at least 23 days of vacation each year and 9 company-designated holidays)
- Paid Parental Leave
- Paid Caregiver Leave
- Additional sick leave beyond what state and local law require may be available but is unprotected
- Adoption Reimbursement
- Disability Benefits (short term and long term)
- Life and Accidental Death Insurance
- Supplemental benefit programs: critical illness/accident hospital indemnity/group legal
- Employee Assistance Programs (EAP)
- Extensive employee wellness programs
- Employee discounts up to 50% off on eligible AT&T mobility plans and accessories,
- AT&T internet (and fiber where available) and AT&T phone.
#LI-Onsite – Full-time office role-
Ready to join our team? Apply today.
Weekly Hours:
40Time Type:
RegularLocation:
USA:TX:Plano / W Plano Pkwy - Adm:3400 W Plano PkwySalary Range:
$155,400.00 - $261,100.00It is the policy of AT&T to provide equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state or local law. In addition, AT&T will provide reasonable accommodations for qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made.
Job ID R-98629 Date posted 01/27/2026
Benefits
Your needs? Met. Your wants? Considered. Take a look at our comprehensive benefits.
- Paid Time Off
- Tuition Assistance
- Medical and dental plans
- Discounts
- Training & Development
Our hiring process
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Assessments
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Interview
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