Principal Engineer, Software

Job Overview:

At T-Mobile, we dont just build technology we empower people. We invest in your growth, leadership, and long-term impact. Were unstoppable when driven individuals come together to solve bold challenges, inspire innovation, and build platforms that power the future.

As a Principal Software Engineer, youll play a critical role in designing and developing high-performance, resilient, cloud-native platforms for device supply chain systems. Youll collaborate with world-class engineers, contribute to scalable solutions, and take ownership of features that support data-driven, AI-enabled systems.

This is a high-impact role where youll be empowered to grow into a future technical leader. Youll influence architecture, drive key technical decisions, and scale your impact across teams with a clear path toward broader responsibility.

Key Responsibilities:

• Design and implement Spring Bootbased microservices and scalable RESTful APIs within a distributed, cloud-native ecosystem.
• Take ownership of end-to-end feature delivery from technical design to production deployment and post-release support.
• Collaborate closely with product, architecture, DevOps, and QA teams to deliver business-critical features and platform capabilities.
• Contribute to system integration, orchestration, and performance tuning across backend services and data pipelines.
• Strengthen platform security, including secrets management, IAM integration, policy enforcement, and vulnerability remediation.
• Analyze and improve engineering workflows by identifying bottlenecks, technical debt, and opportunities for optimization.
• Mentor junior engineers in development practices, debugging techniques, and testing strategies.
• Participate in and lead design discussions, architectural reviews, and code reviews.
• Write clear documentation for implemented features, APIs, and operational considerations.
• Partner with the team to troubleshoot production issues and identify opportunities for enhancements and optimizations.
• Continuously evaluate and adopt new frameworks, patterns, and tools that improve team velocity and system quality.
• Influence the technology roadmap by contributing ideas that support scale, security, and maintainability.

Qualifications:

• Bachelors degree in computer science, Software Engineering, or a related technical field; Masters preferred.
• 10+ years of hands-on software development experience, preferably in backend distributed systems.Overall 12+ years in Technology space.
• Strong programming skills in Java (17 or 21), with deep knowledge of Spring Boot 3.x and the Spring ecosystem (Spring Cloud, Spring Security, Spring Data).
• Expertise in microservices architecture patterns, including API Gateway, authentication, and authorization.
• Strong experience with messaging systems such as Apache Kafka and RabbitMQ (producers, consumers, streams, connect).
• Proficiency with Kubernetes and container orchestration (deployments, services, config maps, secrets).
• Hands-on experience with CI/CD pipelines (GitLab CI), Docker, and major cloud platforms (AWS, Azure, Oracle Cloud).
• Exposure to Oracle Integration Cloud (OIC), Oracle Service Bus, and Oracle SaaS is a strong plus.
• Hands-on experience with monitoring and observability tools (Prometheus, Grafana, Splunk, Open Telemetry).
• Experience with SQL/NoSQL databases (MySQL, Oracle, SQL Server, Cassandra) and caching systems like Redis.
• Knowledge of database migration tools (DSBulk, Flyway, Liquibase) is a plus.
• Exposure to streaming and big-data platforms (Apache Spark, NiFi, Apache Flink) is beneficial.
• Experience with UI frameworks such as Angular, React, or Swift is a nice-to-have.
• Ability to debug and resolve issues in production environments with cross-stack visibility.
• Passion for continuous learning and mentoring junior engineers.

Required Technical Skills:

• Java development (Java 17+ or 21)
• Spring Boot 3.x and the Spring ecosystem
• Messaging infrastructure: Apache Kafka, RabbitMQ
• Microservices architecture and API Gateway patterns
• Kubernetes and container orchestration
• CI/CD (GitLab CI)
• Monitoring & observability: Prometheus, Grafana, Splunk
• Relational & NoSQL databases: MySQL, Oracle, Cassandra
• Caching: Redis
• Testing frameworks: JUnit 5, Mockito, Test Containers
• API testing tools: Postman, Rest Assured
• Code quality tools: SonarQube
• Security: OAuth 2.0, OpenID Connect, JWT, OWASP best practices

Soft Skills:

• Strong problem-solving and analytical abilities
• Excellent communication and collaboration skills
• Experience with Agile/Scrum methodologies
• Ability to mentor and guide junior engineers
• Self-motivated and able to work independently

Why Join T-Mobile India?

At T-Mobile India, you wont just contribute to world-class technology youll help build it. Youll work with global leaders, solve complex system challenges, and develop platforms that redefine how technology powers customer experience.

Were more than a telecom company were a technology powerhouse leading the way in AI, data, and digital innovation. And we do it all with heart, grit, and a passion for empowering people.

Join us and help shape the future of intelligent platforms that serve millions at the scale and speed of T-Mobile.