Principal Software Engineer; Full-Stack

Job Description:

Note:

This role requires experience with artificial intelligence (AI), AI-MCP.

AI is the focus along with both front and back end development. Full-Stack development experience with the following technologies are also a must:
React, Next.js, Node.js, Graph

QL, Java, and public cloud platforms (Azure, GCP, AWS). Experience leveraging AI tools in production environments.

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.

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. In 2025, the digital transformation will revolutionize the digital space, and you can build a career that will propel your future.

We are looking for a Principal Full Stack Engineer who has hands‑on experience with both front‑end (UI) and back‑end technologies.

• Contribute to the development of both Frontend (UI) and Backend (BFF) layers.
• Build Frontend with React JS and Backend BFF (Backend for Frontend) layer with either Java & Java script / REST / Graph
  
  QL / Node JS / Mule Soft.
• Create and support the development of responsive/adaptive web applications.
• Work closely with the UX/UI Designers to create high‑quality, innovative, and intuitive user experiences in our products.
• Employ engineering techniques to build high‑performance pages, user and browser‑friendly UI / Web solutions.
• Effectively use Git Hub Co‑pilot across SDLC for pair programming, unit test cases, automation test cases, and to write user stories in agile processes to increase developer productivity.
• Partner with Enterprise, Application Architecture teams and contribute to the detailed design and architecture to enable secure, scalable, and maintainable software.
• Focus on scalability, security, and availability of all applications and processes.
• Design, code, test, debug, and document new and existing components to ensure that software meets business, quality, and operational needs.
• Build high‑quality code following unit testing and test‑driven and security‑driven development.
• Implement all critical NFRs defined at the solution level.
• Constantly improve website performance with the help of application monitoring tools such as Dynatrace, Quantum Metrics, Splunk, etc.
• Work with the team to troubleshoot code‑level problems quickly and efficiently.
• Apply deep technical expertise to resolve challenging programming and design problems.

• Bachelor’s or Master’s Degree program in Computer Science, Computer Engineering, or a related field (or equivalent experience).
• Extremely motivated, highly passionate, and curious about new technologies. Take pride in your work and strive to achieve incredible results and possess superb communication and planning skills.
• 10+ years of proven experience building sophisticated applications and APIs in Cloud and hybrid cloud environments at large scale.
• Preferably Next.js on the UI with Node.js on the backend, or React.js on the UI with Java on the backend.
• Experience building applications using Generative AI, LLMs & Copilots.
• 7+ years of experience developing applications utilizing relational databases and/or no SQL databases as part of the overall application architecture.
• 7+ years of experience in implementing caching techniques for a web application.
• Ability to work successfully with multi‑functional teams, principals, and architects. Coordinates optimally across organizational boundaries and geographies.
• 7+ years of experience with front‑end frameworks like React.js.
• 7+ years of strong background in object‑oriented…