New

Sr Software Engineer, Agentic AI

T-MOBILE USA, Inc.
$113,600 - $205,000Corporate Bonus Target: 15%
life insurance, vision insurance, flexible benefit account, paid time off, paid holidays, tuition assistance, 401(k)
United States, Washington, Bellevue
3625 132nd Ave Se (Show on map)
Dec 18, 2025
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 critical in designing, building, and scaling the core execution engine that powers T-Mobile's agentic AI experiences across mobile apps, web platforms, and customer support channels-including both text and voice interactions. You will architect and implement software systems that enable AI-driven decisioning, orchestration, and dynamic customer engagement at massive scale. Working closely with AI/ML engineers, platform engineers, and product teams, you will create reliable, high-performance components that allow our agentic AI to plan, act, and respond intelligently in real time across conversational modalities. This includes developing microservices, workflow engines, and integration layers that connect large language model (LLM) reasoning with network, billing, account, and support systems. The role requires deep technical judgment to solve complex system design challenges, ensure model outputs translate into safe and correct actions, and deliver a platform capable of extremely high availability. Success is measured by the ability to deliver robust, extensible AI execution capabilities that elevate customer journeys and enable T-Mobile to deliver personalized, automated, and intuitive experiences-whether through text or voice-at scale. Job Responsibilities: Develop software solutions and conduct tests to drive engineering projects and ensure quality deliverables Contribute to design innovations that improve systems, processes, or services using new frameworks and industry best practices Collaborate with technical teams to deliver solutions and mentor others through knowledge sharing and training sessions Support technology strategy by evaluating and applying current technologies that align with business goals Create clear documentation for software code, system designs, and business requirements to support knowledge sharing Also responsible for other duties/projects as assigned by business management as needed Education and Work Experience: Bachelor's Degree plus 5 years of related work experience OR Advanced degree with 3 years of related experience (Required) Acceptable areas of study include Computer Science, Software Engineering, Information Management or equivalent experience in field (Required) 4-7 years - Technical engineering experience. (Required) Preferred Experience: 4+ years - Fluency in either Python or Java, with working proficiency in the other. 1+ year - Hands-on experience deploying and operating services using Docker and Kubernetes. 1+ year - Proficiency leveraging LLMs to accelerate coding and problem-solving. 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 Base Pay Range: $113,600 - $205,000 Corporate Bonus Target: 15% 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.