Principal Engineer, Software - Java Full Stack

Role Overview: You will be joining as a Principal Software Engineer at TMUS Global Solutions, a subsidiary of T-Mobile US, Inc. Your primary responsibility will be leading system architecture, modernization, and backend engineering efforts for enterprise-scale document management platforms. Your role will involve defining scalable designs, driving platform performance, and integrating AI-powered solutions to enable secure, stable, and fast digital operations at scale. Additionally, you will have the opportunity to shape engineering standards, developer experience, and ensure cross-team technical alignment. Key Responsibilities: - Define and architect scalable, high-performance solutions for financial and operational platforms - Lead system design for complex business logic and high-availability architecture - Drive modernization and refactoring of legacy systems to meet cloud-native standards - Set coding standards and architectural patterns across Java/Spring Boot microservices - Own CI/CD pipeline integration, DevOps workflows, and cloud deployment reliability - Champion platform performance, observability, and cost-effective scaling - Lead integration with third-party platforms, internal APIs, and enterprise services - Mentor engineers, conduct design reviews, and enforce secure coding practices - Support system tuning, production diagnostics, and full-stack debugging - Align architecture strategy with business domain context and platform roadmap - Drive data-driven decisions through performance analytics and usage patterns - Collaborate with ML, platform, and SRE teams to define SLAs, escalation strategies, and platform-wide reliability goals - Present engineering strategy, progress, and outcomes to senior leadership Qualifications Required: - Bachelors degree in Computer Science, Engineering, or related field - 7-12 years of hands-on backend and microservice architecture experience - Expert-level knowledge in Java, Spring Boot, REST/gRPC APIs, and distributed systems - SQL experience, especially with Oracle DB; performance tuning and optimization - 3+ years of DevOps experience with GitLab/GitHub CI/CD pipelines - Proficient in Kubernetes, container orchestration, and secure deployments - Strong experience with data flow orchestration and event-driven integrations - Familiar with Splunk, Grafana, and backend debugging at scale - Solid understanding of platform security, network protocols, and service resiliency - Demonstrated leadership in architecture decisions and cross-team collaboration - Passion for mentoring, innovation, and scalable platform design Note: The job description also includes a list of "Must Have Skills" and "Nice To Have" skills for reference.,