Senior API .Net Software Developer

Description

Build the APIs and .NET applications that power business-critical solutions. This is a remote position with quarterly travel required. Applicants must reside in one of the following states: AL, GA, ID, LA, MO, OK, SC, TN, TX, UT, or WI.

What You'll Do

• Design, develop, test, deploy, and maintain enterprise applications using the Microsoft .NET platform.
• Build secure, scalable RESTful APIs and integration services that connect internal and external systems.
• Develop reusable, high-performance services using modern .NET development practices.
• Ensure applications and APIs are reliable, well-documented, versioned, and built with maintainability in mind.
• Drive technical excellence by leading the full software development lifecycle—from architecture and design through deployment and ongoing support.
• Identify opportunities to improve application performance, scalability, security, and development processes.
• Research, evaluate, and implement new tools, frameworks, and technologies that support modern .NET and API development.
• Collaborate across teams by partnering with Business Analysts, architects, and stakeholders to transform business requirements into scalable technical solutions.
• Participate in project planning, architecture discussions, and development estimates.
• Work closely with developers, QA engineers, and infrastructure teams to ensure seamless application integrations and successful deployments.
• Lead and mentor by providing technical leadership and mentorship to junior developers.
• Conduct code reviews and promote best practices in .NET development, API design, testing, documentation, and security.
• Foster a collaborative engineering culture focused on continuous improvement and innovation.

Required Qualifications

• 7+ years of progressively responsible software development experience.
• Strong experience developing enterprise applications using C# and the Microsoft .NET platform (.NET Core/.NET).
• Experience designing, developing, and supporting RESTful APIs and web services.
• Experience integrating enterprise applications through APIs and service-oriented architectures.
• Understanding of API security, authentication, authorization, and versioning strategies.
• Experience working within Agile software development environments.
• Ability to translate business requirements into technical solutions and application designs.
• Strong analytical, troubleshooting, and problem-solving skills.
• Excellent written and verbal communication skills.
• Experience mentoring developers and providing technical leadership.
• Ability to participate in occasional after-hours support as needed.

Preferred Qualifications

• Experience with ASP.NET Core, Entity Framework, and SQL Server.
• Experience building cloud-native applications and microservices.
• Familiarity with Azure, Azure DevOps, CI/CD pipelines, Docker, Kubernetes, and cloud-based application development.
• Experience with API gateways, OpenAPI/Swagger, and event-driven architectures.
• Master's degree in Computer Science or a related technical field.

About Security Finance

Founded in 1955, Security Finance serves communities by providing installment loans and income tax preparation services. We believe in treating customers with respect, supporting our communities, and investing in our employees. As part of our technology team, you'll help build innovative software solutions that support our business and the customers we serve.