T-Mobile USA, Inc. seeks Senior Engineers, Software in Bellevue, WA to design and develop internal and external business systems/applications, systems interfaces, databases, reporting, or business intelligence systems, as required to deliver new systems functionality supporting corporate business objectives. Lead moderately complex software projects and work with Sr. Manager, Sr. Developer, and Business System Analysts to ensure timely delivery of the project. Translate business and functional requirements into documented technical specifications. Utilize development skills to build (code) and unit test new software systems functionality per technical specifications, with deliverables to include code builds and documented unit test results. Develop application support documentation as required by the application support teams for acceptance of systems changes into production. Build and unit test production deployment packages and implementation plan for scheduled systems enhancements. Identify and resolve technical issues/conflicts within the project team. Review (walkthrough) technical specifications and program code with other members of the technical team, communicating design, requirements, feature set, functionality, and limitations of systems/applications to team and development lead. Utilize departmental Systems Development Lifecycle Methodology as a guide for development activities. Apply project management methodology/discipline including Agile Methodology. Provide on-call and after-hours support as required for production releases. Contribute to and work to meet project schedules by providing accurate estimates of effort required for development deliverables, by providing updates on project progress to development and project management, and by escalating issues that might affect project success to the management. Collaborate and partner with other teams including Enterprise Testing, Release Planning and Management, Business Systems Analysis, Project Management, and Application Support on the successful delivery of systems enhancements. Telecommuting is permitted, but applicants must live within a reasonable commuting distance. Experience and education requirements: PRIMARY REQUIREMENTS: Master's degree in Information Systems, Computer Engineering, or related field, and 3 year of relevant work experience.  ALTERNATIVE REQUIREMENTS: Bachelor's degree in Information Systems, Computer Engineering, or related field, and 5 years of relevant work experience. In addition, the following skills are required: (1) Using Microsoft SQL Server including SSIS and SSRS to extract out of the various transactional systems and flat files, transform, and load to where data can be analyzed and reported on; (2) Conducting .NET programming using C# asp.net, JavaScript, HTML and CSS; (3) Using technologies including Dynatrace and Splunk to identify software security and performance issues and providing appropriate fixes; (4) Using Atlassian technologies including JIRA and Bamboo to create CICD pipelines for better software deliveries and standards; and (5) Using Web Services protocols including REST, SOAP and API design for extensibility and portability. Washington Pay Range: $157,196.69 to $162,196.69/year. The pay range above is the general base pay range for a successful candidate in the state listed. The successful candidate's actual 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, while Retail and Business Sales roles are eligi