Senior .NET Developer Mainframe Modernization

Overview

Remote
On Site
Accepts corp to corp applications
Contract - W2
Contract - 12+ Month(s)

Skills

.Net
c#
.NET core development
RRC LoneSTAR

Job Details

Role: Senior .NET Developer Mainframe Modernization
Location: Austin, TX - Remote

Why Join Us?
Be part of a high-impact modernization effort that drives the future of regulatory software in the Texas energy sector.

  • Remote work flexibility

  • Long-term contract with strong renewal potential

  • Collaborative Agile team environment

  • Chance to influence enterprise-level architecture and modernization strategy

About the Role
We're seeking a Senior .NET Developer with prior experience supporting the Railroad Commission of Texas (RRC), ideally in the LoneSTAR application. You'll lead technical initiatives in a high-visibility mainframe modernization project-applying your deep expertise in .NET Core, C#, MS-SQL, JSON, and Azure technologies to build robust integrations and scalable APIs.

This position is ideal for developers with proven state agency experience who can independently navigate complex projects, collaborate across departments, and lead junior developers in delivering secure, high-quality software.

Key Responsibilities

  • Lead full SDLC efforts including architecture, coding, testing, deployment, and production support

  • Build modern APIs and microservices using .NET Core, C#, and Azure stack (App Services, Functions, Logic Apps)

  • Enhance and support the LoneSTAR application and associated RBDMS platforms

  • Develop secure, scalable, and testable code using CI/CD practices in Azure DevOps

  • Collaborate with cross-functional teams including PMs, BAs, architects, and DevOps

  • Troubleshoot and resolve complex technical issues and support after-hours deployments

  • Guide and mentor junior developers, conduct code reviews, and contribute to a culture of technical excellence

Required Skills & Qualifications

  • Bachelor's in Computer Science or related field

  • 8+ years of .NET development experience with C#

  • 8+ years in .NET Core and team-based environments

  • 2+ years of hands-on experience with the RRC LoneSTAR application

  • Strong SQL Server experience, JSON, Swagger, and production support skills

  • Available for occasional night/weekend deployment support

  • Detail-oriented, self-driven, and comfortable leading initiatives

Preferred Skills

  • Experience with GoAnywhere secure file transfer

  • Azure DevOps, Visual Studio IDE, Telerik/Kendo UI

  • Familiarity with microservices, SOA, REST APIs

  • Unit test development and regression analysis

  • PDF generation (e.g., iText), multi-environment Azure deployment

Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.

About ChaTeck Incorporated