About the position
At T-Mobile, we invest in YOU! Our Total Rewards Package ensures that employees get the same big love we give our customers. All team members receive a competitive base salary and compensation package - this is Total Rewards. Employees enjoy multiple wealth-building opportunities through our annual stock grant, employee stock purchase plan, 401(k), and access to free, year-round money coaches. That’s how we’re UNSTOPPABLE for our employees! T-Mobile is transforming from a traditional Telco to a next-generation TechCo—and our Billing organization is leading the charge. We are rebuilding our foundational systems to enable world-class experiences not only for today’s wireless services, but also for tomorrow’s technologies like 6G, IoT, and beyond. The Senior Software Engineer collaborates with cross-functional teams to architect, develop, and optimize software solutions that drive core billing and operational processes in mission-critical telecom environments. In this role, you will take technical ownership of complex backend components, ensure scalability and reliability of high-volume billing systems, and contribute to continuous improvement efforts across the platform. You will work with a blend of legacy systems and modern technologies—including C/C++, Java, Oracle PL/SQL, and Unix/Linux scripting—while mentoring junior developers and implementing engineering best practices.
Responsibilities
- Drives engineering projects by developing software solutions; conducting tests and inspections; preparing reports and calculations.
- Lead the design, development, and enhancement of core modules within a high-volume, telecom-grade billing and operational system.
- Translate sophisticated business requirements into robust technical implementations across invoicing, rating, and customer account lifecycle processes.
- Develop performant and maintainable code using C/C++, Java, and Unix/Linux shell scripting, ensuring standard processes are followed.
- Optimize and handle sophisticated PL/SQL queries and stored procedures for large-scale Oracle databases.
- Guide integration efforts with batch processes, schedulers, and other OSS/BSS components, ensuring operational efficiency.
- Conduct advanced root cause analysis of production issues and proactively implement preventative solutions.
- Drive modernization of legacy components by implementing abstraction layers, APIs, or refactoring initiatives.
- Lead code reviews and performance evaluations, mentoring junior developers and promoting engineering excellence.
- Author and implement high-quality documentation standards across technical, deployment, and fixing domains.
Requirements
- Bachelor's Degree in Computer Science or Engineering.
- 4-7 years of technical engineering experience.
- Extensive experience with telecom billing systems or large-scale enterprise platforms, with a strong focus on rating, charging, and revenue assurance processes.
- Advanced proficiency in C/C++, Java, and Unix/Linux scripting, with a shown ability to develop maintainable, production-ready code.
- Deep expertise in Oracle SQL and PL/SQL development, including query optimization and troubleshooting in high-volume environments.
- Strong background in designing and maintaining batch-oriented, high-throughput transaction processing systems.
- Proven understanding of telecom-specific concepts such as CDR processing, roaming data handling, taxation logic, accounts receivable (AR), and RFS/provisioning integration.
- Experience working with mixed technology stacks that include legacy systems, proprietary tools, and modern interfaces.
- In-depth knowledge of telecom BSS/OSS domains, including mediation, billing cycles, and configuration-driven rule engines.
- Ability to mentor team members on system configuration, best practices, and complex logic interpretation.
Nice-to-haves
- Experience with Amdocs billing systems is preferred.
Benefits
- Medical, dental and vision insurance.
- Flexible spending account.
- 401(k).
- Employee stock grants.
- Employee stock purchase plan.
- 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.
