Senior 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. We collaborate closely with clients and internal teams to ensure detailed API flows, environment readiness, and smooth testing execution.
What You'll Do:
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.
Design, develop, and execute test plans and strategies.
Implement and enhance test automation to improve coverage and regression reliability.
Collaborate with Program Managers, Development Leads, and Architects to identify test scenarios.
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:
3-5 years of hands-on software quality assurance and testing experience.
Strong analytical and troubleshooting skills with knowledge of application architecture.
Experience with SQL/NoSQL query writing.
Proficiency in automation testing tools and strategies in integrated test environments.
Experience with API testing, microservices, email/SMS communications, file feeds, and UI components.
Familiarity with Agile/SCRUM and DevOps methodologies.
Excellent written and verbal communication skills.
Highly organized, detail-oriented, and able to prioritize multiple tasks.
Self-motivated and works well independently and collaboratively.
Strong client communication and issue resolution skills.
Nice To Have:
Experience as a test lead or test architect with responsibility for large-scale projects.
Familiarity with defect triage and tracking tools.
Background in performance, usability, security, and scalability testing.
Experience in continuous integration/continuous deployment (CI/CD) environments.
Required Qualifications:
- 3-5 years of related experience.
Desired Qualifications:
- Degree in Engineering, Information Systems, or related technical field.
- Experience in building multiple versions systems addressing performance and scale.
- Experience developing technical documentation on applications and systems. - Ability to work with technical and business-oriented teams.
Our Senior System Engineering, earns between $130,700-$196,100 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-
#ConsumerTechnologyeXperience
AT&T is leading the way to the future – for customers, businesses, and the industry. We're developing new technologies to make it easier for our customers to stay connected to their world. Together, we’ve built a premier integrated communications and entertainment company and an amazing place to work and grow. Team up with industry innovators every time you walk into work, creating the world you always imagined. Ready to #transformdigital with us?
Apply now!
Weekly Hours:
40Time Type:
RegularLocation:
USA:WA:Bothell / 20205 North Creek Pkwy - Adm (bothell 8):20205 North Creek PkwySalary Range:
$116,700.00 - $196,100.00It 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-77215-2 Date posted 08/11/2025
Benefits
Your needs? Met. Your wants? Considered. Take a look at our comprehensive benefits.
- Paid Time Off
- Tuition Assistance
- Insurance Options
- Discounts
- Training & Development
Our hiring process
Apply Now
Confirm your qualifications align with the job requirements and submit your application.
Assessments
You may be required to complete one or more assessments, depending on the role.
Interview
Get ready to put your best foot forward! More than one interview may be necessary.
Conditional Job Offer
We’ll reach out to discuss a conditional job offer and the next steps to joining the team.
Background Check
Timing is important – complete the necessary actions to proceed with onboarding.
Welcome to the Team!
Congratulations! It’s time to experience #LifeAtATT.
Check your email (and SPAM) throughout the process for important messages and next steps.
Connect today
Didn’t find what you were looking for here? Sign up for our job alerts so we can connect and share the latest.