Principal Software Engineer
About The Position
This role sets technical direction for the systems that make T-Mobile's data usable across customer-facing applications, analytics, and AI-driven products. It involves designing and building high-performance services and APIs: the distributed data stores, low-latency access layers, and real-time sync mechanisms that deliver the right data to each consumer within strict latency and reliability targets. The role requires applying seasoned engineering judgment to solve complex systems challenges and to make recommendations on architecture, technology selection, and API and service design. Success is measured by the scalability and reliability of these systems, the strength of technical leadership provided to engineers, and the ability to influence engineering decisions across the organization. The work impacts the organization by enabling the real-time, AI-ready capabilities that power better products and customer experiences.
Requirements
- Bachelor's Degree plus 7 years of related work experience OR Advanced degree with 5 years of related experience (Required)
- Acceptable areas of study include Computer Science or Engineering (Required)
- 7-10 years Technical engineering experience. (Required)
- AI/ML Infrastructure
- Knowledge Graphs
- Vector Databases
- Streaming and caching architecture
- API Design and Governance
- MCP-Style tooling or agent facing data access patterns
- Data sync pipelines
- Analytics, Collaboration and Communication skills
- Analytical Thinking, Cloud computing, Customer Service and Leadership skills
- Software Development and Technical Writing skills
- At least 18 years of age
- Legally authorized to work in the United States
Responsibilities
- Design and build serving infrastructure for AI use cases including vector databases, graph databases, and agent-facing data patterns
- Design Infrastructure-as-Code blueprints for provisioning serving stores, sync pipelines, and APIs in a repeatable, governed way
- Partner with business teams and other technical teams to drive technical decision making, mentor engineers, and contribute to reusable blueprints and reference implementations.
- Design and develop high-performance data stores, real-time sync pipelines, and governed APIs that deliver data at the latency and scale each use case requires
- Drive engineering projects to deliver software 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 software designs and improvements that enhance existing systems and processes
- Produce clear technical documentation and architecture descriptions for internal and external stakeholders
- Also responsible for other duties/projects as assigned by business management as needed
Benefits
- Competitive base salary and compensation package
- Annual stock grant
- Employee stock purchase plan
- 401(k)
- Access to free, year-round money coaches
- Medical insurance
- Dental insurance
- Vision insurance
- Flexible spending account
- 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-term disability
- 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
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What This Job Offers
Job Type
Full-time
Career Level
Principal
