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Full Stack Principal Software Engineer, Gen AI

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T-Mobile

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Location:
United States , Bellevue

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Contract Type:
Not provided

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Salary:

133500.00 - 240700.00 USD / Year

Job Description:

This role leads the design, architecture, and delivery of agentic AI platforms and scalable software systems that integrate Large Language Models (LLMs) into production-grade enterprise environments. It is responsible for building backend and microservices-based systems that orchestrate AI agents, APIs, data pipelines, and cloud-native infrastructure. The role ensures AI-driven capabilities are secure, observable, performant, and maintainable at scale. It applies advanced engineering judgment to resolve complex distributed systems challenges and define enterprise AI architecture standards. Success is measured by production reliability of AI systems, technical leadership impact, and the ability to influence enterprise AI strategy and implementation.

Job Responsibility:

  • Drive architecture and engineering delivery of agentic AI platforms, including LLM-integrated backend systems, microservices, APIs, and distributed cloud-native infrastructure to meet scalability, security, and reliability standards
  • Provide technical leadership across AI initiatives by mentoring engineers, defining engineering standards for AI systems, and influencing architectural and technology decisions at the organizational level
  • Define and evaluate AI platform strategies, including microservices architecture, model orchestration patterns, distributed systems design, and cloud deployment models aligned with business objectives
  • Develop innovative AI-enabled software designs and improvements that enhance existing systems and processes
  • Produce clear architectural documentation for AI systems and distributed platforms
  • Also responsible for other duties/projects as assigned by business management as needed

Requirements:

  • Bachelor's Degree plus 7 years of related work experience OR Advanced degree with 5 years of related experience
  • Acceptable areas of study include Computer Science or Engineering
  • 7-10 years Technical engineering experience
  • Communication
  • Customer Service
  • Analytics
  • Technical Writing
  • At least 18 years of age
  • Legally authorized to work in the United States
What we offer:
  • Annual stock grant
  • Employee stock purchase plan
  • 401(k)
  • Access to free, year-round money coaches
  • Medical, dental and vision insurance
  • Flexible spending account
  • Employee stock grants
  • Employee stock purchase plan
  • Paid time off
  • Up to 12 paid holidays
  • 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
  • Voluntary long-term care insurance
  • Mobile service & home internet discounts
  • Pet insurance
  • Access to commuter and transit programs

Additional Information:

Job Posted:
March 03, 2026

Employment Type:
Fulltime
Job Link Share:

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