Job Description:

This position requires office presence of a minimum of 5 days per week and is only located in the location posted.  No relocation is offered

About the Company:

Join AT&T and reimagine the communications and technologies that connect the world. Our Consumer and Business Technology Team is delivering innovative and best in class 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.

What You'll do:

As a Principal Software Engineer, you will architect and implement scalable, secure, and efficient API solutions that drive growth across AT&T Business’s multi-billion-dollar Indirect Sales channels. This hands-on role is pivotal in shaping future-state architecture, optimizing API performance and enabling seamless integration across diverse systems, directly enhancing customer experience and accelerating sales.

As the subject matter expert, you will provide technical leadership and develop robust, secure solutions for AT&T’s extensive API ecosystem, empowering third-party distribution partners to operate with greater speed and automation.

Key Roles and Responsibilities:

Strategic API Architecture & Roadmap:

Develop and implement a cohesive architectural vision for AT&T's API platforms (including the AT&T Integration Platform built in Node.js and MuleSoft), ensuring they align with strategic business goals and technology roadmaps.

Serve as the subject matter expert in API architecture, development, performance, and integrations, optimizing strategic investments and guiding technology evolution.

API Design and Development:

Design and document API solutions with a comprehensive analysis of technical trade-offs, considering both functional and non-functional requirements (NFRs) to support intricate sales channels.

Integrate systems by adhering to MuleSoft best practices and industry standards.

Enhance the solution's reusability, security, and performance by applying relevant concepts and patterns.

API Platform Optimization & Operational Excellence:

To ensure our API platform performs optimally and remains stable, we must maintain and enhance the existing APIs while also developing new integrations to meet business requirements.

Provide Tier 2 and Tier 3 level analysis/support, including performance monitoring, troubleshooting, and incident resolution.

Cross-Functional Collaboration & Stakeholder Management:

Partner seamlessly with internal teams such as Product Managers, Technology Production Support, Service Delivery, Mobility and Wireline Product Marketing, Chief Security Office, Sales Channels, and CSI/AIM.

Collaborate with portfolio stakeholders, Enterprise Architects, System Engineers, and development teams to align architectural direction and ensure seamless integration.

Job Contribution:

A proven expert in API architecture/design/development

Strong analytical and multi-tasking abilities to thrive in a fast-paced environment.

Leads critical, high-visibility projects that directly impact multi-billion dollar sales channels.

Works with minimal oversight, influencing API strategy decisions and serving as a mentor to others.

A proactive problem-solver with the ability to lead complex integrations, troubleshoot issues, and ensure seamless execution in a fast-paced environment.

Implement integration technology using MuleSoft best practices and leading standards.

Apply concepts and patterns to promote security and performance in the solution.

Design API layers, data models, and API specifications based on appropriate functional and technical requirements.

Develop APIs using MuleSoft platform components, including API Manager, CloudHub/RTF, AnyPoint Studio, Dataweave, Connectors, Design Center, and AnyPoint Messaging Queue (MQ).

Follow MuleSoft development best practices, ensuring solution performance and system scalability.

Conduct code reviews and provide guidance to the team on best practices.

Create necessary documentation, give presentations to business clients, and obtain necessary approvals.

Test and improve API performance in terms of response time, reliability, and resource usage.

Write Dataweave expressions to transform data, control message content, flow, and processing.

Design and implement comprehensive error handling strategies for applications.

Drive continuous integration and delivery of APIs using DevOps tools.

Configure and deploy Mule applications to CloudHub and/or customer-hosted Mule runtimes.

Implement and consume REST and SOAP web services.

Create and configure flows, subflows, and flow processing strategies for reusability and performance.

Troubleshoot complex production issues with APIs, identify the source of the issue, and work with the appropriate team to resolve it.

Possess basic knowledge of Salesforce and Node.js

TCP Career Step Differentiator:

Architects and implements complex API solutions that enable strategic, high-value sales initiatives, directly contributing to revenue growth and market competitiveness.

Education/Experience:

Master's degree (MS/MA) desired in Computer Science or related field.

7+ years of experience in API architecture, integration, and development.

Proven expertise in Java, MuleSoft and experience in Azure,  MongoDB, CI/CD Pipeline and GitHub.

Certifications in MuleSoft a plus.

Supervisory:

No.

Our Principal Software Engineering, earns between $158,200-$237,400 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

Ready to join our team? Apply today

Weekly Hours:

40

Time Type:

Regular

Location:

USA:TX:Plano / W Plano Pkwy - Adm:3400 W Plano Pkwy

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-82057 Date posted 09/16/2025