Partners Personnel Management-posted about 1 month ago
Full-time • Mid Level
Onsite • Calhoun, GA
5,001-10,000 employees
Administrative and Support Services

Op5, Inc. is a technology and logistics solutions company based in Calhoun, Georgia, specializing in custom-built software for operational efficiency, e-commerce management, and business automation. With over two decades of experience developing and maintaining mission-critical applications, Op5 delivers powerful, scalable systems that streamline processes for clients across multiple industries. Our in-house development team leverages the full Microsoft technology stack - from ASP.NET and SQL Server to Azure and AI integrations - to create innovative, reliable solutions that drive real business results. We are seeking a motivated Full-Stack .NET Developer to join our in-house development team in Calhoun, Georgia. This position is responsible for maintaining and enhancing a suite of over twenty custom business applications built on the Microsoft stack. You'll work closely with our IT Director on projects that include upgrading legacy ASP.NET applications to newer .NET versions and implementing our company's AI integration roadmap. This is a full-time, on-site position - all work is performed from our Calhoun, GA office. It's an excellent opportunity for a developer who is technically capable and eager to grow, but open to learning established processes and best practices within a cohesive Microsoft environment.

  • Maintain, enhance, and troubleshoot existing ASP.NET (WebForms and MVC) applications.
  • Upgrade legacy .NET Framework applications to newer .NET platforms (Core/5/6/7/8, Blazor).
  • Develop new application features, APIs, and integrations based on business needs.
  • Work with SQL Server databases - stored procedures, queries, schema optimization.
  • Assist with implementing AI-driven projects using Microsoft and Azure technologies.
  • Collaborate with the IT Director and other team members on development priorities, testing, and deployments.
  • Provide Tier 3 technical support and help document application updates and releases.
  • 3-5 years of professional experience developing in C# (VB.Net experience a plus).
  • Solid background in ASP.NET WebForms and/or ASP.NET MVC development.
  • Proficiency in SQL Server (T-SQL, stored procedures, optimization).
  • Familiarity with HTML5, CSS3, JavaScript/jQuery, and Bootstrap.
  • Understanding of RESTful APIs and JSON data structures.
  • Experience with Visual Studio, source control (Git), and IIS deployment.
  • Strong debugging skills and a structured approach to problem-solving.
  • Ability to approach projects innovatively and anticipate challenges or enhancements beyond defined project scope.
  • Exposure to .NET 6+ or modern .NET Core development.
  • Familiarity with large language models (LLMs) and foundational AI training concepts is highly desirable.
  • Experience with DevExpress controls or similar UI component libraries.
  • Familiarity with Microsoft Graph API, Azure AI, or Azure Communication Services.
  • Knowledge of Microsoft Exchange, Office 365, or SharePoint integrations.
  • Basic understanding of PowerShell scripting or Windows task automation.
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