Senior .NET Engineer

Our Vision: Be the best at what we do. Our Mission: Improve lives through technology.

Summary:

Customer Inspired isn’t our slogan — it’s our driving force, and C Spire team members live it. We aim to engage the exceptional and embrace operational excellence to best deliver connectivity and technology solutions that advance our communities and customer’s lives. It’s a challenging goal, but we have a winning team that is looking to grow.
As a Senior .NET Engineer, you will play a critical role in designing, developing, modernizing, and supporting enterprise applications that power key business operations across C Spire. This role combines strong software engineering expertise with business process analysis, solution design, and end-to-end ownership of the software development lifecycle. You will work closely with business stakeholders and technical teams to build scalable solutions, improve existing applications, modernize technology platforms, and drive continuous improvement across our enterprise systems landscape.

Responsibilities:

What You Will Do

In all of your duties, you will have a relentless, obsessive, yet disciplined approach to manage all details to perfection and deliver desired results.

• Design, develop, maintain, and enhance enterprise applications built on C#, .NET Framework, and modern .NET platforms.

• Lead and participate in all phases of the software development lifecycle, including requirements gathering, technical design, development, testing, deployment, documentation, and support.

• Develop and maintain SQL Server data structures, queries, stored procedures, and integrations while contributing to long-term modernization and migration initiatives.

• Support the modernization of enterprise applications through containerization, cloud-native architecture principles, and Linux-based deployment strategies.

• Collaborate with business stakeholders to understand operational workflows, gather requirements, identify process improvement opportunities, and translate business needs into scalable technical solutions.

• Build and maintain REST APIs and integrations with internal systems, third-party applications, and enterprise platforms.

• Apply software engineering best practices, coding standards, architectural patterns, and design principles to ensure maintainable and scalable solutions.

• Identify technical debt, prioritize remediation efforts, and drive continuous improvements to application performance, reliability, and maintainability.

• Troubleshoot production issues, perform root cause analysis, and implement long-term corrective actions.

• Mentor and support other developers through technical guidance, knowledge sharing, and software delivery best practices.

This position is an exceptional opportunity to work on enterprise-scale applications while helping shape the future technology direction of C Spire’s business systems. From Senior .NET Engineer, you will have a strong springboard into technical leadership, software architecture, and enterprise technology strategy roles across the organization.

Qualifications:

What You Will Bring

As a C Spire team member you will bring a relentless obsession to be the best in our industry and a winning mentality, determined to outsmart and outdo competitors. You will have a single-minded commitment to unbeatable internal customer and external customer experience. To support our Tools and Automation team you will have an unapologetic passion for innovation and technology and an uncompromising drive toward continuous improvement.

In addition to that, we require:

• Bachelor’s degree in Computer Science, Software Engineering, Information Systems, or a related field, or equivalent professional experience.

• Extensive professional experience developing enterprise applications using C# and the .NET ecosystem.

• Strong understanding of object-oriented programming, software architecture, SOLID principles, and enterprise application design patterns.

• Advanced SQL Server experience, including schema design, query development, stored procedures, and performance optimization.

• Experience building and consuming REST APIs and integrating enterprise applications across distributed environments.

• Experience with containerization technologies such as Docker and familiarity with modern deployment and CI/CD practices.

• Working knowledge of Linux operating systems and application deployment environments.

• Experience with source control systems, automated deployment pipelines, and modern software delivery methodologies.

• Demonstrated ability to gather, analyze, document, and refine business requirements and translate them into effective technical solutions.

• Strong analytical, problem-solving, communication, and technical documentation skills.

• Ability to independently manage priorities, navigate ambiguity, and deliver high-quality solutions with minimal supervision.

We will give special consideration to candidates who have:

• Experience migrating .NET applications from Windows environments to Linux-based container platforms.

• Experience with Kubernetes or comparable orchestration technologies.

• Familiarity with PostgreSQL, MySQL, or other cloud-native relational database platforms.

• Experience with workflow automation, business process management platforms, or workflow-driven application design.

• Experience with message queues, event-driven architectures, and enterprise integration platforms.

• Experience working within regulated, compliance-driven, or highly governed business environments.

What You Will Gain

A great workplace needs more than dental coverage, though we provide that and excellent health insurance. But that’s just the start. We make sure working at C Spire is the best career experience around. And Forbes has named us one of America's Best Midsize Employers multiple times because of it.

For our full-time employees we offer:

• Competitive Compensation Package

• Blue Cross Blue Shield Health Insurance

• Tuition Assistance Programs

• Complimentary Wireless Service & Device*

• 401k Match

• Teladoc Telemedicine

• WellBeacon Wellness Program

• Paid Talent Referral Opportunities

• Tailored learning paths for every position

Physical Requirements / Working Conditions

Must be able to sit for extended periods of time and use a computer keyboard and/or mouse while viewing a computer screen. Occasional after-hours work may be required to support application deployments, maintenance activities, or critical business initiatives.

*Complimentary wireless service and device available to team members in our wireless footprint.