Application Developer Software Engineer Jobs in Michigan

Job Summary:
Penske Vehicle Services is seeking an Application Developer to maintain, enhance, and support business-critical applications and integrations. The role involves working with .NET Framework and SQL Server to develop new functionalities and troubleshoot existing applications, ensuring system reliability and efficiency.
Responsibilities:
• Maintain, troubleshoot, and enhance existing applications developed using C# and .NET Framework 4.8.
• Develop new application functionality and modernized solutions using .NET 10 and current Microsoft development practices.
• Analyze business requirements and translate them into reliable, supportable application solutions.
• Modify and support web applications, background processes, scheduled jobs, APIs, web services, and system integrations.
• Develop clean, maintainable, testable, and documented code aligned with organizational standards.
• Participate in modernization efforts where legacy application functionality is transitioned into current .NET technologies.
• Write, maintain, and troubleshoot complex T-SQL queries, stored procedures, views, functions, and data-processing routines.
• Investigate application and integration issues involving missing, incorrect, duplicated, or improperly processed data.
• Support data imports, exports, interfaces, automated processes, and client-specific business workflows.
• Review SQL logic for accuracy, performance, reliability, and maintainability.
• Assist with SQL performance troubleshooting, including inefficient queries, blocking, execution delays, and large data operations.
• Perform controlled data corrections when required, with appropriate validation, documentation, and approvals.
• Investigate production application issues, identify root cause when possible, and implement or coordinate corrective action.
• Support business-critical line-of-business applications, including eGAMS and related client-facing processes.
• Support incidents involving integrations, scheduled processing, web services, database procedures, application errors, and data discrepancies.
• Participate in prioritization and resolution of application-related tickets based on business impact and client needs.
• Document findings, resolutions, workarounds, and preventive improvements.
• Develop and support interfaces between internal applications, external client systems, databases, APIs, file transfers, and automated processing platforms.
• Troubleshoot inbound and outbound file processing, web service communication, API integrations, and scheduled application processes.
• Create and execute developer-level unit, integration, and regression testing plans for application changes, enhancements, corrections, and integrations; coordinate independent user acceptance testing with business stakeholders or a designated testing resource.
• Support controlled deployments across development, testing, beta, and production environments.
• Document application changes, SQL changes, deployment instructions, rollback considerations, and technical procedures.
• Participate in post-deployment validation and resolution of release-related issues.
Qualifications:
Required:
• Bachelor's degree in Computer Science, Information Systems, Software Development, or a related discipline; or equivalent relevant professional experience.
• Three to five years of professional application development experience in a Microsoft-based environment.
• Strong development experience with C#, .NET Framework 4.8, ASP.NET and/or Microsoft web application development.
• Strong Microsoft SQL Server and T-SQL experience, including stored procedures, joins, data updates, troubleshooting, and query optimization.
• Experience supporting existing production applications and resolving application or data-related issues.
• Experience with the software development lifecycle, including requirements review, development, testing, deployment, and production support.
• Ability to analyze complex application and data-processing issues independently.
• Strong written, verbal, documentation, and collaboration skills.
Preferred:
• Experience developing solutions using .NET 8, .NET 9, or .NET 10.
• Experience modernizing applications from legacy .NET Framework platforms to current .NET technologies.
• Experience with REST APIs, SOAP web services, JSON, XML, SFTP, file-processing interfaces, or external integrations.
• Experience with Microsoft IIS-hosted applications and Git or other source control tools.
• Experience with application logging, exception management, troubleshooting tools, and production monitoring.
• Familiarity with scheduled processing or automation platforms such as VisualCron.
• Experience supporting client-facing business applications or systems with high data accuracy requirements.
• Familiarity with secure coding practices, access controls, and audit/compliance expectations.
Company:
Penske Vehicle Services is an automotive company offering vehicle lifecycle management, body paint, and fabrication services. Founded in 1986, the company is headquartered in Troy, USA, with a team of 501-1000 employees. The company is currently Late Stage.