T

T-Mobile

Connects U.S. customers by phone and internet

Principal Engineer - Platform

Full-Time
$136.2k - $272.4k+ Annual bonus/incentive
Senior, Expert
Bachelor's, Master's
Philadelphia, PA, USA+2 moreMore locations: New York, NY, USA | Bellevue, WA, USA
In PersonTravel is not required.
DevOps & InfrastructurePlatform Engineering

About the job

Requirements
  • A Bachelor's degree and 7 years of related work experience, or an advanced degree and 5 years of related experience, is required.
  • Acceptable areas of study include Computer Science or Engineering.
  • 7–10 years of technical engineering experience is required.
  • Analytical thinking is required.
  • Analytics is required.
  • Cloud architectures are required.
  • Cloud computing is required; AWS is preferred within this requirement.
  • Collaboration is required.
  • Communication is required.
  • Customer service is required.
  • Leadership is required.
  • Mentorship is required.
  • Microservices architecture is required.
  • Knowledge of emerging technologies is required.
  • Software development is required.
  • Technical evaluation is required.
  • Technical writing is required.
  • Applicants must be at least 18 years of age.
  • Applicants must be legally authorized to work in the United States.
Responsibilities
  • Drive engineering projects to deliver software and infrastructure solutions that meet technical requirements and quality standards.
  • Provide technical leadership by mentoring engineers and influencing technology and policy decisions across the organization.
  • Evaluate and apply technology strategies that align with business goals and system requirements.
  • Develop innovative architecture and improvements that enhance existing systems and processes.
  • Produce clear technical documentation and architecture descriptions for internal and external stakeholders.
  • Perform other duties or projects as assigned by business management.
Desired Qualifications
  • AWS experience is preferred.

About the company

T-Mobile runs a nationwide wireless network for consumers and businesses in the United States, selling mobile phone service and broadband internet access. Its flagship T-Mobile brand sits alongside prepaid brands Metro by T-Mobile and Mint Mobile, reaching customers with different budgets and payment preferences. Customers connect through phones or home internet gateways, while businesses buy connectivity for staff and connected equipment. Revenue comes from recurring service plans, wholesale network access, and sales of devices and accessories. Its operating roots date to 1994, and its headquarters are in Bellevue, Washington, and Overland Park, Kansas.

Company Size

10,001+

Company Stage

IPO

Headquarters

Bonn, Germany

Founded

1994

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Simplify's Take

What believers are saying

  • Service growth supports investment: T-Mobile reported 9% yearly service-revenue growth in July 2026, including acquired businesses.
  • Cash supports stability: T-Mobile reported $7.5 billion of Q2 operating cash flow in July 2026.
  • Study while working: T-Mobile pays full tuition at selected online universities and supports full-time and part-time employee education.

What critics are saying

  • Integration threatens overlapping jobs: T-Mobile's UScellular restructuring includes severance for redundant processes and functions.
  • Minority shareholders lack control: Deutsche Telekom is T-Mobile's controlling stockholder.
  • Meridian customer-care work starts onsite: T-Mobile grants hybrid eligibility after training only to Experts meeting performance and attendance goals.

What makes T-Mobile unique

  • Spectrum shapes its network: T-Mobile combines broad-reaching 600 MHz frequencies with Sprint-derived 2.5 GHz capacity.
  • Engineers work beyond older network constraints: T-Mobile's standalone core operates independently of 4G infrastructure.
  • Satellite access reaches rival customers: T-Mobile sells T-Satellite separately without requiring a T-Mobile mobile plan.

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Benefits

  • Health Insurance
  • Dental Insurance
  • Vision Insurance
  • 401(k) Retirement Plan
  • 401(k) Company Match
  • Paid Vacation
  • Paid Sick Leave
  • Paid Holidays
  • Paid Parental Leave
  • Family Planning Benefits
  • Childcare Support
  • Tuition Assistance

Company News

Yahoo Finance
Oct 29th, 2026
T-Mobile CEO sees "no room" for SpaceX MVNO deal as SpaceX eyes 80,000 cell sites

T-Mobile chief executive Srini Gopalan said he sees "no room" for a mobile virtual network operator (MVNO) deal with SpaceX, on the company's third-quarter earnings call on October 28, 2026. Verizon's chief executive has taken the same stance. The refusal comes as SpaceX agreed to buy nationwide 800 MHz spectrum and was reported to be in talks to access about 80,000 US cell sites. Without wholesale access, SpaceX must own spectrum and rent towers, a costlier path. The spectrum deal needs Federal Communications Commission approval and is expected to close in the first half of 2027. Gopalan said he would consider a resale deal for a complementary product. T-Mobile earned $3.22 a share on $23.58 billion of revenue, and raised its free cash flow guidance to $18.7 billion to $18.8 billion.

Yahoo Finance
Oct 27th, 2026
T-Mobile stock down 31.8% in a year: will support hold after past 50% rebounds?

T-Mobile US stock has fallen 31.8% over the past year, dividends included, while the S&P 500 gained 15.3%. The shares are back at levels where they bounced in late 2023 and early 2024. After four earlier starting points between November 2023 and April 2024, the stock rose more than 50% within about a year each time. The median best gain was 56.7%. Revenue grew 9.7% in the twelve months to June 2026, against 0.7% in the period to June 2024. The operating margin was 20.1%, close to 19.9% two years ago. Management expects slower growth in the third quarter, guiding to about 250,000 postpaid net account additions, down from 277,000 in the second. Support counts as broken if the stock closes more than 5% below today's price.

Yahoo Finance
Oct 26th, 2026
AT&T and T-Mobile step up AI security spending as AT&T eyes $18B free cash flow

AT&T and T-Mobile are spending more to protect customer data and networks from AI-related security threats, executives from both companies told Reuters. They said fully self-running networks are still years away. T-Mobile chief technology officer John Saw said the company is improving threat monitoring and working with vendors to close security holes quickly. T-Mobile's breaches in 2021 and 2023 affected over 100 million customer accounts. AT&T chief technology officer Jeremy Legg said some risks lie outside the company's control. AT&T uses encryption, multi-factor authentication, and human oversight of data access. In the third quarter, AT&T's free cash flow was about $5 billion, and capital spending was $5.6 billion.

Associated Press
Oct 26th, 2026
T-Mobile launches T-Mix plans from $55 a month with customisable "Picks" benefits

T-Mobile has launched T-Mix, a wireless plan that lets customers choose which benefits come with their service. Three plans, Standard, More and Loaded, will be available in November. Customers use "Picks" toward streaming, music, gaming, food delivery, sports, AI, wireless benefits and device promotions, including a new phone. They can change their mix during set windows, four times a year, without changing their monthly plan. Standard costs $55 a month for one line and includes one Pick. More costs $75 with two Picks, and Loaded costs $95 with three. Prices include AutoPay and exclude taxes and fees. T-Mobile says Loaded offers at least $120 in average monthly value per line.

Yahoo Finance
Oct 23rd, 2026
T-Mobile US stock falls 5% as SpaceX reportedly eyes 80,000 towers after $8B spectrum deal

T-Mobile US shares fell 5% by 11:15 on Friday after Bloomberg reported that SpaceX plans to lease 80,000 cellphone towers and build a fourth major US mobile carrier to compete with T-Mobile, Verizon, and AT&T. Two weeks ago, SpaceX said it would pay $8 billion to Grain Management for up to 14 megahertz of paired spectrum in the 800 MHz band. It said the deal would help Starlink Mobile become a major US carrier. The towers would supplement the 15,000 direct-to-cell Starlink satellites SpaceX has asked the Federal Communications Commission to let it launch. SpaceX earns a 45% operating margin from its Starlink connectivity business. T-Mobile's margin is 22%, and new competition could push it lower.