Job Description:

Principal Full-Stack Developer

NOTE: This role requires current experience in highly scalable technical environments. Specifically high-volume websites and high-velocity transactions. Also performance engineering coupled with solid Full-Stack development skills in Java, React.js and Node.js (Python or Javascript are also desirable)

About the Company:
Join AT&T and reimagine the communications and technologies that connect the world. Our Consumer Technology experience team is delivering innovative and reliable technology solutions to 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:

This team works with external apps and websites, within the AT&T domain. External high-volume B2C type transactions in the millions per day. We need candidates with both full-stack experience and high-volume websites and high-velocity transactions.

As part of our team, you’ll transform the way we deliver a seamless customer experience with digital at the center of all you do. In our world, digital is much larger than just an eCommerce channel, we are transforming all channels to digitally perform as one team to create a better customer experience. Digital transformation will revolutionize the digital space, and you can build a career that will propel your future.

We are looking for a Principal Software Engineer who has hands on experience on both front-end (UI) and back-end technologies and extensive experience is solving web application performance bottlenecks and optimize services and applications to improve overall performance of the system. This role is for a full stack developer who also has experience in performance engineering

Key Roles and Responsibilities:

• Lead and deliver highly available and scalable solutions leveraging multi-region principles.
• As a Principal Engineer, monitors the performance of web applications and provides technical leadership to drive performance improvements with industry standard and innovative techniques.
• Define and track key software performance indicators to drive continuous performance optimizations.
• As a Principal Engineer, build sophisticated test suite and integrate with CI/CD to continuously measure performance and make it part of development practices.
• Recommends infrastructure upgrades to support business growth and evolving technology requirements.
• Ensures the integrity, security, compliance, and performance of platforms and the applications or services that reside within by partnering with peer engineering leads and architects.
• Partners with engineering teams to create and maintain documentation for key architecture and design decisions related to performance, availability, scalability and caching strategies.
• Adheres to and drives modern software engineering practices through design reviews.
• Develops “best-in-class” engineering for our applications by ensuring that the services and the components are well-defined and modularized, high performance, secure, reliable, diagnosable, actively monitored, and reusable.
• Improves test coverage for services; promotes a “shift-left” mindset; organizes and implements integration tests; and resolves problem areas.
• Stays abreast of emerging technologies and assesses their applicability to the organization.
• Fosters a collaborative environment that encourages knowledge sharing and skill development.
• Leads and mentors a team of engineers; provides technical guidance, sharing best practices, and fostering a culture of continuous learning and growth.

Role Requirements:

• Bachelor’s or master’s degree program in Computer Science, Computer Engineering, or a related field (or equivalent experience).
• 10+ years of proven Full Stack Development experience building sophisticated applications and APIs in Cloud and hybrid cloud environments at large scale in JavaScript and React JS.
• 10+ years of solid experience and understanding of software engineering principles, design patterns, and best practices for building highly scalable and maintainable systems.
• 5+ years of working experience with high-volume websites and high-velocity transactions and designing systems that can handle the demands of real-time or near-real-time data.
• 5+ years of experience in using observability tools such as APM, analytics platforms, etc.
• 5+ years of experience with identifying and solving performance bottlenecks of web pages at 90th + percentile with under 3 seconds load time.
• In-depth understanding and practical application of networking architecture principles and security: caching and content delivery (CDN).
• 5+ years of experience working with cloud platforms, such as Azure, AWS or Google Cloud, to architect and implement scalable, high performance and efficient solutions.
• 5+ years of experience in using Synthetic Monitoring tools for analyzing and optimizing Front end performance metrics.
• 3+ years of experience in using Log Monitoring tools

Desired Qualification and Skills:

• Demonstrated ability to drive innovation, adapt to emerging technologies, and implement industry best practices.
• Experience in building applications and performance scripts using AI Peer Programming tools.
• Proficient in using modern software development tools, version control systems (ex. Git), and continuous integration/continuous deployment (CI/CD) pipelines.
• Strong communication and leadership abilities, with a proven track record of collaborating effectively in cross-functional teams and mentoring junior engineers.
• Demonstrated ability to take ownership and responsibility of critical issues and conclude them to resolution.
• Excellent problem-solving and analytical skills, with the ability to dissect complex technical challenges and propose innovative solutions.

Technical Skills:

CDN, Caching techniques, React.js, Node.js, Next JS, Micro Front-End architecture, Typescript, Graph QL, Bootstrap.js, HTML5, XML, CSS3, JavaScript, REST services, NoSql technologies (Cassandra/Mongo DB), Spring boot, Kafka/MQ, Redis, ELK, Azure / AWS, Prometheus/Grafana, Git, Jira, Jenkins, Docker, Kubernetes, Quantum Metrics, Performance testing, Performance tuning.

Our Principal Performance Engineering, earns between $158,200.00-$237,400.00 USD Annual total comp estimate, 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.

#ConsumerTechnologyeXperience

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.

Weekly Hours:

40

Time Type:

Regular

Location:

USA:TX:Dallas / Two AT&T Plaza (211 S Akard St) - Dat:211 S Akard St

Salary Range:

$158,200.00 - $237,400.00

It 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-80038 Date posted 08/20/2025