Principal Sales Engineer — Solutions & Partner Enablement (Network APIs)

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!

Location: Bellevue, WA (Hybrid) — Onsite at least 3 days/week. This role is not remote.

The Team & Mission

T Mobile’s Network as a Service (NaaS) team builds innovative network API products that empower developers, partners, and enterprises to build their differentiated digital solutions. Our mission is to solve enterprise challenges with scalable, developer friendly solutions that tap into T Mobile’s differentiated network capabilities.

The Opportunity

As a Principal Sales Engineer, you’ll be the technical leader driving developer and partner adoption and enablement for our NaaS platforms and APIs. You’ll guide customers from first conversation through production—shaping world class developer experiences, accelerating integrations, and ensuring successful deployments. You’ll partner closely with Business Development and Product to turn network APIs into real business outcomes.

What You’ll Do

• Act as the bridge between Product and Business Development, ensuring customer needs align with product capabilities.
• Support presales conversations by understanding customer requirements and showing how our products deliver value.
• Educate customers on how to use our products effectively through demos, technical discussions, and proof-of-concepts.
• Serve as the main technical and product point of contact after the deal is signed, driving smooth onboarding and integration.
• Partner with product managers to create key materials such as presales decks, solution architectures, and technical documentation to support customer and partner engagement.
• Gather customer feedback to influence product roadmap and improve the overall experience.

What You’ll Bring

• Deep expertise in APIs, SDKs, and developer platforms, with strong engineering fundamentals and integration skills.
• Sharp business context understanding to assess customer needs and align technical solutions with business goals.
• Strong product sense to translate complex capabilities into clear customer value.
• Hands-on experience leading presales and post sales technical engagements for enterprise customers.
• Proven ability to manage complex projects and drive execution across product, engineering, and GTM teams.
• Excellent communicator who can bridge technical depth with business clarity and executive impact.
• Adaptive, agile, and growth-oriented mindset—comfortable operating in ambiguity, shifting priorities, and driving continuous learning and improvement.

Qualifications

Education

• Bachelor’s degree in Engineering, Computer Science, or a related field (required).

Experience

• 10+ years in Sales Engineering, Solutions Engineering, or Product Management across APIs, developer platforms, or enterprise SaaS.
• Proven track record driving presales and post-sales success through deep technical engagement and business alignment.
• Strong experience leading customer onboarding, partner integrations, and solution delivery at scale.
• Deep understanding of API management, SDK development, and cloud infrastructure.
• Hands-on experience managing complex technical programs using Agile methods and iterative delivery.
• Exposure to AI- or automation-driven developer tools and modern API lifecycle management (preferred).
• Demonstrated ability to influence product strategy and collaborate effectively with senior business and engineering leaders.

Why This Role

You’ll be the connector that turns T-Mobile’s network capabilities into real customer and partner impact. This role blends product, engineering, and business—helping shape how customers understand, adopt, and succeed with our network APIs. You’ll operate like a startup inside a large enterprise: moving fast, solving ambiguous problems, and driving both strategy and execution. If you thrive at the intersection of technology, business, and customer success, this is where you’ll make your mark.

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

Travel:
Travel Required (Yes/No):Yes, 5%

 

Base Pay Range: $133,800 - $241,400

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.