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!
Advertising, meet the Un-carrier. We are standing up for Consumers and Advertisers to redefine an industry. Again. Ever feel like relevant, engaging, and safe advertising is an impossible ask? We are working to change that by building an advertising platform that allows brands and advertising agencies to engage real audiences with a customer-centric, privacy first approach.This is not a product internal to T-Mobile; but one that is used by all the major advertising agencies in the United States and many of the top consumer product brands. Our team builds the enabling technology behind this revolution. We are a fast-moving team that builds, runs, and operates the T-Mobile Advertising Solutions platforms, including our audience building, rideshare, and retail media network solutions.
If you thrive on collaborating with cross-functional teams to solve complex problems, writing robust full stack code, and deploying scalable systems to the cloud, we want to talk to you. We're looking for an engineer who bring strong technical judgment, a product mindset, and the ability to own solutions end-to-end—from architecture to implementation to delivery—in a fast-moving AdTech environment.
The Principal Engineer Full Stack will lead the design, development, and deployment of scalable, high-performance systems across the full technology stack—including modern web frameworks, backend services, microservices, databases, and cloud infrastructure. You’ll collaborate closely with cross-functional teams to deliver innovative advertising solutions that balance performance, privacy, and user experience. You’ll serve as a technical leader, driving architecture decisions, mentoring engineers, and ensuring that our platforms are resilient, maintainable, and built for growth. While not a security-specific role, you will embed best practices for reliability and compliance into everything you build, helping to ensure the integrity of our infrastructure and applications.
Job Responsibilities:
Design, develop, and maintain end-to-end solutions across web front ends, APIs, microservices, and cloud infrastructure.
Collaborate with cross-functional teams including product, security, privacy, and operations to define and deliver features.
Lead system architecture discussions and technical decision-making for complex projects.
Write clean, testable, and efficient code in modern languages and frameworks.
Advocate for software engineering best practices, including CI/CD, automated testing, and observability.
Mentor team members and help foster a culture of learning, quality, and continuous improvement.
Education:
Bachelor's Degree Computer Science or Engineering (Required)
Work Experience:
7–10 years of experience in full stack software development (front end + back end).
7+ years of experience with databases, both relational and NoSQL, including schema design and optimization.
4+ years of experience building and maintaining cloud-native systems using AWS, Azure, or GCP.
3 + years of hands-on experience with DevOps practices and infrastructure as code (Terraform, CloudFormation, etc.).
Deep knowledge of modern web frameworks (e.g., React, Vue, Angular) and backend stacks (e.g., Node.js, Python, Java).
Solid understanding of microservices, APIs, and distributed systems.
Familiarity with security best practices and a strong appreciation for privacy-forward design.
Experience mentoring engineers and influencing engineering culture.
Knowledge, Skills and Abilities:
Travel:
Travel Required (Yes/No): Yes
DOT Regulated:
DOT Regulated Position (Yes/No): No
Safety Sensitive Position (Yes/No): No
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, https://paylookup.t-mobile.com/paylookup?reqID=REQ328384¶dox=1At 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.