Principal Software Engineer

T-Mobile; Bellevue (WA); On-site; USD 180,000 - 240,000; Full time

Benefits offered by this job

Medical insurance

401(k)

Paid time off

Tuition assistance

Stock grants

Job summary

T-Mobile is seeking a senior technical leader to set the direction for data systems powering AI-driven products and fast APIs in Bellevue, WA. You will architect and scale serving infra, including vector and graph databases, while guiding and mentoring a team of engineers.

This role emphasizes hands-on design, leadership, and governance across API design, data pipelines, and cloud infrastructure to support high-velocity product delivery.

Qualifications

• Requires a Bachelor's degree in Computer Science or Engineering with 7+ years of experience, or an advanced degree with 5+ years.
• 7–10 years of technical engineering experience and expertise in AI/ML infrastructure and API design.

Responsibilities

• Set technical direction for data systems to enable AI-driven products and high-performance APIs.
• Design and build serving infrastructure, including vector and graph databases, while mentoring engineers.

Skills

AI/ML Infrastructure

Knowledge Graphs

Vector Databases

Streaming Architecture

Caching Architecture

API Design

API Governance

MCP-Style Tooling

Data Sync Pipelines

Cloud Computing

Software Development

Technical Writing

Analytical Thinking

Leadership

Infrastructure-as-Code

Distributed Data Stores

Education

Bachelor's degree in Computer Science or Engineering

Advanced degree

Job description

Set technical direction for data systems to enable AI-driven products and high-performance APIs. Design and build serving infrastructure, including vector and graph databases, while providing technical leadership and mentorship to engineers.

Requirements

• Requires a Bachelor's degree in Computer Science or Engineering with 7+ years of experience, or an advanced degree with 5+ years.
• Candidates must have 7-10 years of technical engineering experience and expertise in AI/ML infrastructure and API design.

Key Skills

• AI/ML Infrastructure
• Knowledge Graphs
• Vector Databases
• Streaming Architecture
• Caching Architecture
• API Design
• API Governance
• MCP-Style Tooling
• Data Sync Pipelines
• Cloud Computing
• Software Development
• Technical Writing
• Analytical Thinking
• Leadership
• Infrastructure-as-Code
• Distributed Data Stores

Benefits

• Medical insurance
• Dental insurance
• Vision insurance
• Flexible spending account
• 401(k)
• Employee stock grants
• Employee stock purchase plan
• Paid time off
• 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
• Commuter and transit programs