Sr. Engineers, Software is located in Bellevue, WA will research, design, and develop computer and network software or specialized utility programs. • Telecommuting is permitted, but applicant must work from the worksite location at least 3-4 days per week. No additional national or international travel is anticipated. Position duties and responsibilities include, but are not limited to: • Analyze user needs and develop software solutions, applying principles and techniques of computer science, engineering, and mathematical analysis. • Understand system protocols, how systems operate and data flows. • Aware of current technology benefits. • Develop a full software stack. • Understand the building T Mobile blocks, interactions, dependencies, and tools required to complete software and automation work. • Interact with architects and principal engineers to define system requirements. • Drive engineering projects by developing software solutions, conducting tests and inspections, and preparing reports and calculations. • Contribute to designs and new frameworks that implement new ideas that improve an existing or new system/process/service. • Understands and can apply new industry perspectives to our existing business model. • Reviews existing designs and processes to highlight more efficient ways to complete existing workload more efficiently through industry perspectives. • Collaborates with technical teams and applies system expertise to deliver technical solutions. • Maintains knowledge of existing technology documents. • Writes basic documentation on how technology works. • Crafts clear documentation for new code and systems used. • Documents systems designs, presentations, and business requirements for consumption and consideration at the manager level. • Contributes to new and existing technology options that support business goals. • Translates business and functional requirements into documented backlog in partnership with Product Owner. Minimum requirements: Experience and education requirements: PRIMARY REQUIREMENTS: Master's degree in Computer or Information Technology, Software Engineering, or related, and 3 years of relevant work experience. ALTERNATIVE REQUIREMENTS: Bachelor's degree in Computer or Information Technology, Software Engineering, or related, and 5 years of relevant work experience. Skills requirements: Requires experience in each of the following: Developing enterprise-scale, consumer-facing web applications end-to-end using Java, Spring Boot, JavaScript, TypeScript, and modern front-end framework. Designing and building content-driven web solutions using Adobe Experience Manager, including Sites, HTL (Sightly), Sling Models, OSGi, JCR, Content/Experience Fragments, and Dispatcher caching. Creating RESTful services and data layers using Java, Spring Boot, JPA, and Hibernate; implementing security with Spring Security (JWT, OAuth2); and ensuring quality through unit testing with JUnit and Mockito. Building dynamic user interfaces with Alpine.js, semantic HTML, and CSS: Flexbox, and Grid; optimizing performance using Webpack or Vite; and ensuring compliance with WCAG 2.1 AA accessibility standards. Implementing CI/CD pipelines using GitLab, containerizing and deploying applications with Docker and Kubernetes, and monitoring using Splunk, Splunk Observability, and OpenTelemetry for distributed tracing and metrics. Applying OWASP-aligned secure coding practices to prevent CSRF and XSS; performing code reviews with static analysis tools such as Checkstyle and ESLint; and optimizing system performance for TTFB, CLS, LCP, and API latency. • Location: Bellevue, WA • Telecommuting is permitted, but applicant must work from the worksite location at least 3-4 days per week. No additional national or international travel is anticipated. • This position is eligible for the employee referral program. How to apply: • Visit https://www.t-mobile.com/careers • Create a candidate profile, and apply to requisition number: REQ368573 OTHER: Work hours: 40 hours/week. Salary: $212,202 to $217,202 per year. • At least 18 years of age • Legally authorized to work in the United States Travel: Travel Required (Yes/No): No DOT Regulated: DOT Regulated Position (Yes/No): No Safety Sensitive Position (Yes/No): No Candidate's pay will be based on various factors, such as work location, qualifications, and experience. 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. 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!