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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. 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.
Job Responsibility:
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
Requirements:
Bachelor’s degree in Engineering, Computer Science, or a related field (required)
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
At least 18 years of age
Legally authorized to work in the United States
Nice to have:
Exposure to AI- or automation-driven developer tools and modern API lifecycle management