Senior Software Engineer (Backend APIs/Platform)

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!

Job Overview
Are you ready to join the Un-carrier movement?

We are seeking a Senior Software Engineer to join our Device Insurance Technology team and play a key role in building a new in-house engineering capability. This role will serve as a technical leader and foundational member of a growing team responsible for delivering scalable, reliable API-based platforms.

In this role, you will take ownership of existing services, lead new development efforts, and help define engineering practices, architecture patterns, and delivery processes. You will work closely with architects, product partners, and external vendors to deliver integrated, business-critical solutions.

This position requires a balance of hands-on development and technical leadership, with a strong focus on ownership, collaboration, and execution in a fast-evolving environment.

Job Responsibilities:

• Design, develop, and maintain Spring Boot-based microservices in a distributed system architecture leveraging engineering best practices and staying compliant with enterprise standards.
• Take ownership of end-to-end feature delivery — from technical design to production deployment and post-release support.
• Ensure APIs are secure, performant, and optimized for integration with external vendor.
• Implement API orchestration including parallel and sequential workflows, data transformation, and security validations.
• Build and run event-driven systems, including consumers and asynchronous flows integrated with other systems.
• Collaborate closely with product, architecture, DevOps, and QA to deliver business-critical features and platform capabilities.
• Contribute to system integration, orchestration, and performance tuning across backend services and data pipelines.
• Analyze and improve engineering workflows, proactively identifying bottlenecks, tech debt, and areas for optimization.
• Provide technical leadership and mentorship to onshore and offshore developers, focusing on design quality and best practices.
• Coordinate with enterprise architects and other engineering teams to align system integration and architecture strategy.
• Conduct code reviews, performance tuning, and issue resolutions to maintain high code quality.
• Stay informed of emerging technologies and industry trends; proactively recommend and implement improvements.
• Write clear technical documentation on feature design, implementation details, and system behavior
• Communicate technical issues and trade-offs effectively with engineers and stakeholders.

Qualifications:

• Strong proficiency in Java/Spring Boot and SQL (Postgres).
• Hands-on experience with WebClient, Swagger 3.0, and RESTful API development.
• Proficient in cloud platforms, particularly AWS, and containerization (Kubernetes, Docker).
• Solid understanding of event-driven architectures and tools like Apache Kafka.
• Knowledge of CI/CD pipelines and DevOps tools including Docker, SonarQube and Git.
• Experience in monitoring and logging using tools such as Splunk, Grafana.
• Creative thinking, continuous learning, strong communication skills and ability to lead development efforts across globally distributed teams

Education and Work Experience:

• Bachelor's Degree plus 5 years of related work experience OR Advanced degree with 3 years of related experience (Required)
• Acceptable areas of study include Computer Science, Software Engineering, Information Management or equivalent experience in field (Required)
• 4-7 years Technical engineering experience. (Required)

• At least 18 years of age
• Legally authorized to work in the United States

Travel:
Travel Required (Yes/No): Yes

DOT Regulated:
DOT Regulated Position (Yes/No): No
Safety Sensitive Position (Yes/No): No

Base Pay Range: $113,600 - $205,000

Corporate Bonus Target: 15%

The pay range above is the general base pay range for a successful candidate in the role. The successful candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range.

At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance and which is set at a percentage of the employee’s eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance. To find the pay range for this role based on hiring location, click here.

At T-Mobile, our benefits exemplify the spirit of One Team, Together! A big part of how we care for one another is working to ensure our benefits evolve to meet the needs of our team members. Full and part-time employees have access to the same benefits when eligible. We cover all of the bases, offering medical, dental and vision insurance, a flexible spending account, 401(k), employee stock grants, employee stock purchase plan, paid time off and up to 12 paid holidays - which total about 4 weeks for new full-time employees and about 2.5 weeks for new part-time employees annually - 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, and voluntary long-term care insurance. We don't stop there - eligible employees can also receive mobile service & home internet discounts, pet insurance, and access to commuter and transit programs! To learn about T-Mobile’s amazing benefits, check out www.t-mobilebenefits.com.

Never stop growing!
As part of the T-Mobile team, you know the Un-carrier doesn’t have a corporate ladder–it’s more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it’s that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you’re living our values while investing in your career growth–and we applaud it. You’re unstoppable!

T-Mobile USA, Inc. is an Equal Opportunity Employer. All decisions concerning the employment relationship will be made without regard to age, race, ethnicity, color, religion, creed, sex, sexual orientation, gender identity or expression, national origin, religious affiliation, marital status, citizenship status, veteran status, the presence of any physical or mental disability, or any other status or characteristic protected by federal, state, or local law. Discrimination, retaliation or harassment based upon any of these factors is wholly inconsistent with how we do business and will not be tolerated.

Talent comes in all forms at the Un-carrier. If you are an individual with a disability and need reasonable accommodation at any point in the application or interview process, please let us know by emailing ApplicantAccommodation@t-mobile.com or calling 1-844-873-9500. Please note, this contact channel is not a means to apply for or inquire about a position and we are unable to respond to non-accommodation related requests.