Principal Engineer, Software

About T-Mobile:T-Mobile US, Inc. (NASDAQ: TMUS), headquartered in Bellevue, Washington, is America’s supercharged Un-carrier, connecting millions through its strong nationwide network and flagship brands, T-Mobile and Metro by T-Mobile. Customers benefit from an unmatched combination of value, quality, and exceptional service experience.About TMUS Global Solutions:TMUS Global Solutions is a world-class technology powerhouse accelerating the company’s global digital transformation. With a culture built on growth, inclusivity, and global collaboration, the teams here drive innovation at scale, powered by bold thinking.TMUS India Private Limited operates as TMUS Global Solutions.About the Role:As a Principal Engineer – DevOps, you will be a key member of the CFL Platform Engineering and Operations team you will lead the architecture and implementation of DevOps strategies, tooling, and infrastructure that accelerate software delivery and enhance platform reliability across mission-critical systems. You will shape DevOps engineering strategy, influence infrastructure and deployment design, and partner across engineering, SRE, security, and architecture to build self-service capabilities, CI/CD excellence, and next-generation automation frameworks.What You’ll Do:- Design and lead implementation of scalable CI/CD pipelines across multiple teams and technologies - Standardize and evolve DevOps tooling and workflows across GitLab, Jenkins, Spinnaker, ArgoCD, or similar platforms - Build template-based, policy-driven pipelines that enforce security, test automation, quality gates, and compliance - Champion infrastructure as code and pipeline-as-code using Terraform, Helm, and GitOps models - Architect self-service platforms for environment provisioning, deployment, secrets management, and release automation - Improve developer velocity and release frequency through simplified, standardized DevOps services - Lead design of deployment strategies including blue/green, canary, rolling updates, and rollback automation - Create monitoring and feedback loops to optimize pipeline health, build time, and deployment success rates - Collaborate with SRE, cloud infrastructure, and application teams to ensure high availability, resiliency, and observability of DevOps systems - Integrate observability practices across DevOps pipelines (e.g., logging, metrics, distributed tracing) - Establish and manage SLOs for build, deploy, and release workflows - Serve as subject matter expert and technical advisor on DevOps architecture, release readiness, and platform maturity - Define engineering standards and guardrails for DevOps adoption across application domains - Mentor DevOps engineers and collaborate with product and platform leaders to align DevOps roadmaps with engineering strategy - Participate in architecture review boards, technical QBRs, and production incident postmortemsWhat You’ll Bring:- Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field - 7-12 years of experience in DevOps, platform engineering, or infrastructure automation roles - Strong expertise in CI/CD tooling (e.g., GitLab CI/CD, Jenkins, CircleCI, Spinnaker) - Hands-on experience designing automated pipelines for microservices, APIs, and cloud-native applications - Advanced scripting and automation in Python, Bash, or Go - Experience with version control and branching strategies - Deep understanding of cloud platforms (Azure preferred; AWS/GCP/OCI acceptable) - Experience with containerization and orchestration: Docker, Kubernetes, Helm - Familiarity with secrets management, compliance tooling (e.g., Vault, OPA), and artifact repositories (e.g., Nexus, Artifactory)Must Have Skills:- Application & Microservice: Java, Spring boot, API & Service Design - Any CI/CD Tools: Gitlab Pipeline/Test Automation/GitHub Actions/ Jenkins /Circle CI/YAML/Helm - App Platform: Docker & Containers (Kubernetes) - Any Databases: SQL & NOSQL (Cassandra/Oracle/Snowflake/MongoDB/Databricks) - Any Messaging: Kafka, Rabbit MQ - Any Observability/Monitoring: Splunk/ Grafana/ Open Telemetry /ELK Stack/ Datadog/ New Relic/ Prometheus) - Data migrations in pipelines (SQL Server, MongoDB)Nice To Have:- Compliance automation (audit trails, secrets rotation) - Deployment safety program (progressive delivery guardrails) - Developer experience platform: golden pipelines, paved paths - Enterprise DevSecOps strategy (SLSA maturity targets) - KPI ownership (CFR, MTTR, Lead Time, Deploy Freq) - Vendor mgmt, build-vs-buy strategy