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Software Developer (.NET MVC / C#)
Software Developer (.NET MVC / C#)TriOptus LLC • St Paul, MN, United States
Software Developer (.NET MVC / C#)

Software Developer (.NET MVC / C#)

TriOptus LLC • St Paul, MN, United States
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  • [job_card.full_time]
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Software Developer (.NET MVC / C#)

Location: St. Paul, MN (Hybrid - Onsite Mon/Tue/Thu)

Job Type: Full-Time Contract

Duration: March 16, 2026 - August 31, 2027

Interview Mode: Microsoft Teams

About the Role

We are seeking an experienced .NET Software Developer to support modernization, redevelopment, and critical security updates for large-scale, high-impact justice and public safety applications. This role involves rewriting legacy systems, enhancing existing features, and supporting integrations across multiple enterprise applications.

You will work closely with cross-functional teams-including architects, analysts, QA, and technical stakeholders-to deliver secure, maintainable, and scalable solutions.

Key Responsibilities
  • Modernize and rewrite legacy applications using ASP.NET MVC, C#, .NET 5+, and modern architectural patterns.
  • Implement application enhancements, security updates, and integration improvements.
  • Develop and support REST/SOAP web services, Windows Services, and Web API components.
  • Collaborate with business analysts, architects, and QA teams to translate requirements into high-quality technical solutions.
  • Participate in Agile Scrum processes, sprint planning, and development ceremonies.
  • Perform unit testing, integration testing, and troubleshoot complex software issues.
  • Support CI/CD pipelines and automation within DevOps environments.
  • Provide knowledge transfer and assist team members with integration and deployment processes.
Required Qualifications
  • 7+ years in ASP.NET MVC development with C#.
  • 5+ years unit testing experience (NUnit preferred).
  • 5+ years working with Entity Framework.
  • 5+ years developing REST/SOAP web services.
  • 5+ years building Windows Services (.NET 5.0 or above).
  • Strong experience with T-SQL, stored procedures, SQL Server.
  • Skills in HTML, CSS, JavaScript, jQuery, Bootstrap 4/5.
  • Experience with XML, XSLT, and object-oriented design.
  • Hands-on DevOps CI/CD experience.
  • Ability to triage and resolve complex technical issues.
  • Familiarity with Domain-Driven Design (DDD).
  • Preferred: Experience with law enforcement or criminal justice systems.
Work Environment
  • Hybrid schedule:
    • Onsite: Monday, Tuesday, Thursday
    • Remote: Wednesday, Friday
  • Onsite location: St. Paul, MN
Why This Opportunity?
  • Long-term engagement (17+ months)
  • Mission-critical modernization work impacting justice and public safety
  • Hands-on work with modern .NET technologies
  • Collaborative environment with cross-functional technical teams


#DotNetDeveloper #CSharpDeveloper #ASPNETMVC #DotNetJobs #SoftwareDeveloper #FullStackDeveloper #CSharp #DotNet #EntityFramework #JavaScript #WebAPI #RESTAPI #SQLServer #DevOps #CICD #AgileDevelopment
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Software Developer (.NET MVC / C#) • St Paul, MN, United States

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