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T-Mobile Logo T-Mobile · IT - Software Development

Sr Software Engineer – Mobile DevOps

United States, Bellevue 113600.00 - 205000.00 USD / Year · Job Posted April 12, 2026
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Job Description

The Sr Software Engineer is essential for designing, implementing, and deploying scalable software solutions that meet customer requirements and support high availability environments. This role is focused on mobile DevOps and platform engineering, enabling reliable, scalable CI/CD systems for iOS and Android application delivery. This team is responsible for supporting and managing the delivery infrastructure for T-Life, Metro, and other enterprise mobile applications, ensuring high-quality releases, operational reliability, and a seamless customer experience at scale.

Job Responsibility

  • Develop and maintain platform tooling and automation that supports mobile build and release workflows
  • Design, implement, and maintain CI/CD pipelines for iOS and Android applications, including build, test, code signing, and distribution (e.g., TestFlight, Play Store)
  • Own end-to-end reliability, performance, and scalability of mobile CI/CD pipelines
  • Build and operate scalable, containerized build infrastructure, including Kubernetes-based ephemeral runners and autoscaling systems
  • Manage mobile release workflows including code signing, provisioning profiles, secure credential management, artifact storage, and versioning strategies
  • Optimize pipeline performance through caching, parallelization, and failure recovery mechanisms
  • Contribute to design innovations that improve systems, processes, or services using modern DevOps and platform engineering best practices
  • Improve developer experience through automation, tooling, and self-service platform capabilities
  • Collaborate with technical and mobile engineering teams to deliver solutions and standardize build and release processes across iOS (Xcode, fastlane) and Android (Gradle) ecosystems
  • Support technology strategy by evaluating and applying current technologies aligned with business goals, including AWS (IAM, S3, EKS), Kubernetes, and cloud-native tooling
  • Implement observability across CI/CD systems, including pipeline performance metrics (build times, failure rates), logging, alerting, and flaky test detection
  • Compose clear documentation for software code, system designs, pipelines, and infrastructure to support knowledge sharing
  • Mentor engineers through technical leadership, knowledge sharing, and DevOps/platform engineering best practices
  • Perform other duties or projects as assigned by business management

Requirements

  • 4–7+ years of technical engineering experience
  • Bachelor’s degree with 5+ years of related work experience, or an advanced degree with 3+ years of related experience
  • Degree in Computer Science, Software Engineering, Information Management, or equivalent experience
  • Strong cross-functional collaboration and stakeholder communication
  • Technical writing skills
  • Software engineering or DevOps experience
  • Strong experience with CI/CD systems (GitLab CI preferred
  • also GitHub Actions, Jenkins, Bitrise, CircleCI)
  • Experience with AWS (IAM, S3, EKS, Secrets Manager) and cloud-native architectures
  • Experience with Kubernetes and containerized workloads
  • Experience designing and operating CI runners / build infrastructure (ephemeral, autoscaling preferred)
  • Strong scripting and automation skills (Python, Bash, etc.)
  • Experience with mobile build systems (iOS or Android)
  • At least 18 years of age
  • Legally authorized to work in the United States

Nice to have

  • Experience with fastlane, Gradle, and Xcode build systems
  • Experience managing mobile code signing, provisioning, and secure credentials
  • Prior iOS or Android development experience
  • Experience with observability tools (e.g., Datadog, Prometheus, logging/metrics systems)
  • Experience integrating AI-assisted tools (e.g., code generation, pipeline optimization, or test automation) into engineering workflows

What we offer

  • Competitive base salary and compensation package
  • Annual stock grant
  • Employee stock purchase plan
  • 401(k)
  • Access to free, year-round money coaches
  • Annual bonus or periodic sales incentive or bonus
  • Medical, dental and vision insurance
  • Flexible spending account
  • 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
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