Principal Applications Developer

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.

Join AT&T and help shape the future of communications and technology that connect the world. We value innovators who seek to explore the unknown and challenge the status quo. Bring your bold ideas and fearless spirit to redefine connectivity and transform how people share stories and experiences. At AT&T, you won’t just imagine the future—you’ll build it.

We are seeking a Principal Application Developer to serve as a critical liaison between Business, Network, and IT, shaping the future of our application landscape.  The candidate plays a key role in designs, developing APIs/services, data flows, and integrations with upstream/downstream systems, and maintaining industry-leading solutions that drive business transformation and operational excellence.  The candidate will lead end-to-end design and development for application features, enhancements, and fixes.  Owns solution design for features/enhancements, reviews designs, and guides implementation. If you thrive in a collaborative, fast-paced environment and enjoy tackling complex challenges, this is the opportunity for you.   

What You’ll Do 

• Collaborate with business, Network, and IT stakeholders to translate strategic objectives into actionable technology roadmaps. 

• Design, develop, and maintain applications using Java, Springboot, Microservices, and modern cloud technologies. 

• Analyze business requirements and propose innovative, cost-effective solutions from ideation to production. 

• Lead solution design sessions, ensuring scalability, operational excellence, and alignment with customer needs. 

• Mentor development teams, promote best practices, and foster a culture of continuous improvement. 

• Provide hands-on development for complex components, resolve critical defects, and support production issues. 

• Track and report on IT portfolio metrics, project timelines, and delivery status to ensure successful outcomes. 

• Work with cross-functional teams to clarify requirements, align priorities, and maintain delivery transparency for stakeholders. 

What You’ll Bring: 

• Bachelor's degree in computer science, plus 9+ years of progressive experience in software development and solution architecture. 

• Extensive hands-on expertise with agentic AI, AI-assisted development, and LLM-based application patterns, including Python, LangChain/LangGraph, prompt workflows, tool integration, and responsible AI practices. 

• Proficiency with AI tools such as GitHub Copilot, Claude, Windsurf, and agent-based coding, as well as expert-level skills in Java, Springboot (REST, MVC, Security), Microservices, and modern cloud technologies. 

• Strong knowledge of telecom industry standards, business processes, and technology solutions. 

• Deep experience with Docker, Kubernetes, Bitbucket, Kafka, Jenkins, Git, OpenShift, AKS, and cloud-native development. 

• Proven ability to gather, document, and ana