Senior Software Engineer

About Lumen

Lumen connects the world. We are igniting business growth by connecting people, data and applications – quickly, securely, and effortlessly. Together, we are building a culture and company from the people up – committed to teamwork, trust and transparency. People power progress.

We’re looking for top-tier talent and offer the flexibility you need to thrive and deliver lasting impact. Join us as we digitally connect the world and shape the future.

The Role

Lumen is seeking a highly skilled Sr. Software Engineer to join our Enterprise Billing space, specifically supporting the Post Billing team. In this role, you will collaborate with team Architects, Product Owners, and Developers to ensure billing solutions are developed accurately and on time. You will play a key part in launching new products, integrating them into our billing ecosystem, and ensuring seamless post-billing operations. Additionally, you will contribute to strategic initiatives such as migrating legacy billing systems to the Azure cloud, modernizing infrastructure, and optimizing performance for scalability. The role also includes supporting production environments, troubleshooting critical issues, and deploying emergency patches to maintain system reliability and uptime. The ideal candidate is an initiative-taker who can quickly understand complex applications, propose innovative solutions, and drive implementation across both development and operational efforts.

Location

This role is designated as a fully remote position within the United States.

The Main Responsibilities

• Collaborate with developers, testers, and product owners to design, develop, test, and support new software features and enhancements for billing systems.
• Design and implement scalable technical solutions to support new product launches and ensure continuity of billing operations.
• Collaborate with cross-functional teams to analyze business needs and translate them into clear, actionable technical requirements.
• Develop into and serve as a subject matter expert (SME) for billing applications, processes, and system integrations.
• Develop and maintain automated tests, including test case creation and implementation of testing frameworks to ensure software quality.
• Write unit tests, troubleshoot integration issues, and deploy emergency patches to resolve critical billing system incidents. Deliver high-performance systems that meet or exceed defined Service Level Agreements (SLAs) for performance and reliability.
• Manage multiple development tasks and projects simultaneously, prioritizing effectively to meet deadlines and business needs. Contribute to cloud migration and modernization efforts for billing applications, with a focus on scalability and maintainability.

What We Look For in a Candidate

Required Qualifications:

• 6+ years of experience with a bachelor’s degree or equivalent education and experience (Computer Science or similar preferred); 4+ years with a master’s degree.
• Strong understanding of software development methodologies, coding standards, and best practices.
• Hands-on experience with Agile methodologies, including sprint planning, backlog grooming, daily standups, and retrospectives.
• 5+ years of development experience with programming languages such as C# and SQL. Proficient in web development using ASP.NET Core, Angular, and Blazor.
• Skilled in relational database management (MSSQL, Oracle), including writing complex queries, stored procedures, and designing database objects.
• Familiar with structured data formats such as XSD, XML, JSON, and YAML.
• Experience with version control systems like TFS, Git, or SVN. Proficient in designing and consuming RESTful APIs.

Preferred Qualifications:

• Understanding of security best practices in application and data development.
• Experience building scalable, high-performance systems for processing large volumes of data.
• Self-motivated, detail-oriented, and highly organized, with a strong sense of ownership.
• Quick to learn and adapt to new technologies and tools. Excellent problem-solving, time management, and communication skills (both written and verbal).
• Exposure to cloud platforms, especially Microsoft Azure, is highly desirable.
• Experience with DevOps practices and CI/CD pipelines is a plus.
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