Principal Full-Stack AI Engineer

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.

What You'll Do:

We are seeking an experienced Principal Software Engineer (Full-Stack AI) to join our team, specializing in designing, developing, and maintaining robust backend systems for AI-driven agent platforms. In this role, you will focus on architecting scalable, reliable backend services and integrating advanced AI agents using Python and frameworks like LangGraph and MCP (Model Context Protocol). You will work closely with multidisciplinary teams to deliver intelligent, context-aware solutions that power real-world applications.

What You'll Bring:

• Backend System Development: Architect, implement, and maintain scalable backend services and APIs using Python (FastAPI, Flask, Django) to support AI agent operations.

• AI Agent & MCP Integration: Develop, deploy, and orchestrate autonomous AI agents, and leverage MCP to coordinate multiple AI models and agent workflows, ensuring seamless interoperability and orchestration.

• Agent Orchestration & Workflow: Utilize frameworks like LangGraph and MCP to design, compose, and manage complex agent workflows, multi-agent coordination, and state management.

• System Integration: Integrate external data sources, third-party APIs, vector databases, and machine learning models to enhance agent capabilities.

• Performance & Reliability: Optimize system performance, ensure high availability, and implement robust logging, monitoring, and error-handling solutions.

• Collaboration: Work cross-functionally with front-end developers, data scientists, and product teams to translate requirements into technical designs and deliverables.

• Security & Compliance: Implement best practices for data security, privacy, and compliance in all backend operations.

What You'll Need:

• Strong experience with backend Python frameworks (FastAPI, Flask, Django), RESTful API design, and database management (SQL/NoSQL).

• Proven expertise in integrating and orchestrating AI agents, LLMs, or multi-agent systems in production environments.

• Hands-on experience with MCP (Model Context Protocol) for coordinating and managing AI models and agent workflows.

• Familiarity with agent workflow orchestration tools such as LangGraph.

• Experience with containerization (Docker), CI/CD pipelines, and cloud infrastructure (AWS, GCP, Azure).

• Knowledge of vector databases, data pipelines, and scalable distributed systems.

• Proven experience designing, optimizing, and maintaining PostgreSQL or other relational databases, including schema design, performance tuning, and advanced query development.

• Excellent problem-solving abilities, attention to detail, and communication skills.

Preferred:

• Background in designing backend architectures for AI or data-intensive applications.

• Experience with knowledge graphs, RAG pipelines, or advanced agent coordination.

• Open-source contributions or experience with modern agent/LLM frameworks, MCP, or similar platforms.

Our Principal Software Engineer earns between?$ $141,300.00 - $237,400.00 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:

40

Time Type:

Regular

Location:

USA:GA:Alpharetta / 500 North Point Pkwy - Adm (owned):500 North Point Pkwy

Salary Range:

$141,300.00 - $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.

AT&T will consider for employment qualified applicants in a manner consistent with the requirements of federal, state and local laws

We expect employees to be honest, trustworthy, and operate with integrity. Discrimination and all unlawful harassment (including sexual harassment) in employment is not tolerated. We encourage success based on our individual merits and abilities without regard to race, color, religion, national origin, gender, sexual orientation, gender identity, age, disability, marital status, citizenship status, military status, protected veteran status or employment status