Senior Software Engineer, Data

T-Mobile US • Bellevue, WA

109d • $113,600 - $205,000

About The Position

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! Advertising, meet the Un-carrier. We are standing up for Consumers and Advertisers to redefine an industry. Again. Ever feel like relevant, engaging, and safe advertising is an impossible ask? We are working to change that by building an advertising platform that allows brands and advertising agencies to engage real audiences with a customer-centric, privacy first approach. This is not a product internal to T-Mobile; but one that is used by all the major advertising agencies in the United States and many of the top consumer product brands. Our team builds the enabling technology behind this revolution. We are a fast-moving team that builds, runs, and operates the T-Mobile Advertising Solutions platforms, including our audience building, rideshare, and retail media network solutions. If you thrive on collaborating with cross-functional teams to solve complex data challenges, designing scalable data architectures, and deploying robust data pipelines to the cloud, we want to talk to you. We're looking for a Sr Software Engineer-Data who brings strong technical judgment, a product-oriented mindset, and the ability to own data solutions end-to-end—from architecture and modeling to implementation and delivery—in a dynamic AdTech environment.

Requirements

• 5+ years of experience in designing and building scalable data systems, including both batch and event driven data pipelines.
• 3+ years of experience working with relational and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB, Cassandra), including schema design, performance tuning, and optimization.
• 2+ years of experience building and maintaining cloud-native data platforms using AWS, Azure, or GCP, with hands-on experience in services like Redshift, BigQuery, Snowflake, or Databricks.
• 3+ years of experience implementing DevOps practices and infrastructure as code using tools like Terraform, CloudFormation.
• Strong programming skills in Python, SQL, with experience building data tooling and APIs.
• Solid understanding of distributed systems, data modeling, and microservices architecture.
• Familiarity with data security best practices, including encryption, access control, and privacy-forward design principles.
• Passion for solving complex problems, learning new technologies, and enabling AI innovation through robust data engineering.
• At least 18 years of age.
• Legally authorized to work in the United States.

Responsibilities

• Develop data engineering solutions, design and develop data pipelines to support Product, business and Data Science teams specific data needs.
• Design and develop data architectures in on-premise, cloud and hybrid platforms.
• Collaborate with cross-functional teams—including product, security, privacy, operations, and partners—to understand data needs, define and deliver features, model data using relational and NoSQL systems, and develop pipelines that are scalable, repeatable, secure, and aligned with data quality standards.
• Drive automation and optimization of data workflows using AI/ML techniques.
• Mentor other team members in their efforts to build data engineering skillsets.
• Assist team management in defining projects, including helping estimate, plan and scope work.

Benefits

• Medical, dental and vision insurance.
• Flexible spending account.
• 401(k).
• Employee stock grants.
• Employee stock purchase plan.
• Paid time off and 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.

What This Job Offers

• Industry: Telecommunications