Principal GenAI Software Engineer

At T-Mobile, we invest in YOU!  Our Total Rewards Package ensures that employees get the same big love we give our customers.  All team members receive a competitive base salary and compensation package - this is Total Rewards. Employees enjoy multiple wealth-building opportunities through our annual stock grant, employee stock purchase plan, 401(k), and access to free, year-round money coaches. That’s how we’re UNSTOPPABLE for our employees!

Job Overview
This role is essential for designing, implementing, and deploying scalable software generative AI-enabled solutions that meet customer requirements and support high availability environments. It involves collaborating with engineers to develop software components using modern CI/CD and deployment practices such as blue green deployments, observability, canary deployments, Kubernetes feature flags and automated rollbacks, . The role requires applying judgment to resolve complex technical issues and making recommendations for generative AI-enabled software architecture and design focusing on releasing and triaging deployed software. Success is measured by the adoption and effectiveness of generative AI-enabled software solutions, technical leadership contributions, dependent teams adoption of recommended architectures and the ability to influence technology decisions. The work impacts the organization by enabling advanced software capabilities that improve operational efficiency and customer experience.

Job Responsibilities:

• Drive the architecture, design, and production deployment of enterprise-scale software development releases using generative AI systems, including LLM orchestration, Agent/Skill creation, retrieval-augmented generation, evaluation, and operational monitoring.
• Design and implement modular AI agents that connect to our core systems Create clean abstractions that let non-technical users to leverage these agents into useful workflows without writing code.
• Provide technical leadership by mentoring engineers and influencing technology and policy decisions across the organization
• Establish GenAI engineering standards, reference architectures, and guardrails to ensure scalability, security, cost efficiency, and responsible AI use across multiple teams. Create templates, patterns, and documentation that accelerate everyone's ability to deliver.
• Develop innovative generative-AI enabled software designs and improvements that enhance existing systems and processes
• Produce clear technical documentation and architecture descriptions for internal and external stakeholders
• Also responsible for other duties/projects as assigned by business management as needed

Education and Work Experience:

• Bachelor's Degree plus 7 years of related work experience OR Advanced degree with 5 years of related experience (Required)
• Acceptable areas of study include Computer Science or Engineering (Required)
• 7-10 years Technical engineering experience. (Required)

Preferred Qualifications:

• Proven track record of architecting and scaling enterprise-grade GenAI platforms (LLM orchestration, agent frameworks) that serve multiple teams and operate reliably in production.
• Experience establishing AI engineering standards, reference architectures, and governance models adopted across an organization.
• Demonstrated ability to design composable AI systems and internal developer platforms that enable non-technical users to build workflows without engineering support.
• Recognized technical leader with experience influencing cross-functional strategy, mentoring senior engineers, and driving AI adoption at the organizational level.
• Experience with release management & CI/CD deployment best practices

Knowledge, Skills and Abilities:

• Communication (Required)
• Customer Service (Required)
• Analytics (Required)
• Technical Writing (Required)

Licenses and Certifications:

• At least 18 years of age
• Legally authorized to work in the United States

Travel:
Travel Required (Yes/No): Yes

DOT Regulated:
DOT Regulated Position (Yes/No): No
Safety Sensitive Position (Yes/No): No

Compensation Range for Bellevue, WA: $173,500 to $234,700

Base Pay Range: $133,500 - $240,700

Corporate Bonus Target: 20%

The pay range above is the general base pay range for a successful candidate in the role. The successful candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range.

At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance and which is set at a percentage of the employee’s eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance. To find the pay range for this role based on hiring location, click here.

At T-Mobile, our benefits exemplify the spirit of One Team, Together! A big part of how we care for one another is working to ensure our benefits evolve to meet the needs of our team members. Full and part-time employees have access to the same benefits when eligible. We cover all of the bases, offering medical, dental and vision insurance, a flexible spending account, 401(k), employee stock grants, employee stock purchase plan, paid time off and up to 12 paid holidays - which total about 4 weeks for new full-time employees and about 2.5 weeks for new part-time employees annually - paid parental and family leave, family building benefits, back-up care, enhanced family support, childcare subsidy, tuition assistance, college coaching, short- and long-term disability, voluntary AD&D coverage, voluntary accident coverage, voluntary life insurance, voluntary disability insurance, and voluntary long-term care insurance. We don't stop there - eligible employees can also receive mobile service & home internet discounts, pet insurance, and access to commuter and transit programs! To learn about T-Mobile’s amazing benefits, check out www.t-mobilebenefits.com.

Never stop growing!
As part of the T-Mobile team, you know the Un-carrier doesn’t have a corporate ladder–it’s more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it’s that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you’re living our values while investing in your career growth–and we applaud it. You’re unstoppable!

T-Mobile USA, Inc. is an Equal Opportunity Employer. All decisions concerning the employment relationship will be made without regard to age, race, ethnicity, color, religion, creed, sex, sexual orientation, gender identity or expression, national origin, religious affiliation, marital status, citizenship status, veteran status, the presence of any physical or mental disability, or any other status or characteristic protected by federal, state, or local law. Discrimination, retaliation or harassment based upon any of these factors is wholly inconsistent with how we do business and will not be tolerated.

Talent comes in all forms at the Un-carrier. If you are an individual with a disability and need reasonable accommodation at any point in the application or interview process, please let us know by emailing ApplicantAccommodation@t-mobile.com or calling 1-844-873-9500. Please note, this contact channel is not a means to apply for or inquire about a position and we are unable to respond to non-accommodation related requests.