Senior .NET Full-Stack Developer

Senior .NET Full-Stack Developer Job

Saint Louis, United States | Posted on 06/24/2026

CEdge has an opportunity for a Senior .NET Full-Stack Developer
, located in Saint Louis, MO (remote/on-site when required) if you are ready to work alongside World Renowned Technology experts and carry the skills below, this is the opportunity that will inevitably take your career to unbelievable levels!

Clearance Required: None;
MoDOT MACHS background check required.

The Senior .NET Full-Stack Developer is the primary application-layer engineer on the TMS contract. This individual owns break/fix resolution, preventive maintenance, and SOW development across the most complex TMS modules:
Bridge Management System (124K+ lines, MVC), MMS (MMSBusLayer 146K+ lines, MMSWebApp 135K+ lines), SIMS (58K+ lines), Railroad Management System (54K+ lines), and the Travel ways suite. The developer follows MoDOT Best Practices, participates in code walkthroughs, and maintains third‑party dependency currency (Dev Express 24.2+, .NET 8+, C# v12).

• Diagnose, resolve, and document all error and malfunction reports within the 2‑business‑day SLA (§2.3.5); deliver code corrections with documentation adequate to explain the problem resolved and any operational differences
• Maintain and enhance TMS applications across the .NET Webforms and ASP.NET MVC stack using C# v12, Visual Studio (current release), Azure Dev Ops, and GIT source repository
• Perform preventive maintenance: small modifications to retain or restore functionality, production monitoring to detect errors, and regular updates to 3rd‑party dependencies including Dev Express 24.2+ and code‑language versions (§2.3.8)
• Develop SOW programming deliverables on schedule and within firm‑fixed hours; stage work for MoDOT system test per approval workflow
• Participate in code and architecture walkthroughs per MoDOT Best Practices (§2.2.3); follow all MoDOT coding standards
• Support impact analysis before each release: identify and document effects of proposed changes on data‑dependent TMS modules (§2.3.8)
• Enter all time worked into MoDOT's Service Desk Plus at end of each week; resolve assigned tickets within time frames agreed with the Project Manager
• Maintain compatibility with MoDOT's evolving infrastructure: implement modifications within 30 days of notification of any architecture change (§2.1.5)
• Produce and maintain technical documentation (engineering notebooks, flowcharts, code commentary) as part of Technical Records obligations (§2.3.4)
• Ensure all developed solutions meet ADA/Section 508 accessibility standards; document and review recommendations with MoDOT before development

• Minimum 3 years of professional .NET application development experience (C#, ASP.NET MVC, .NET Framework and/or .NET 8+)
• Minimum 1 year of experience with Webforms and MVC web development in a .NET environment (§2.2.3)
• Minimum 1 year of experience with Web Services (SOA) (§2.2.3)
• Minimum 1 year of experience with REST/SOAP APIs (§2.2.3)
• Experience with Oracle database in a .NET application context
• Experience with Azure Dev Ops and GIT source control
• Minimum 1 year of experience similar to MoDOT's current computer technical architecture
• Ability to pass MoDOT background check

• Minimum 1 year of experience with Oracle Spatial database (§2.2.3)
• Minimum 1 year of experience with transportation‑related applications (§2.2.3)
• Experience with location referencing applications and data (§2.2.3)
• Experience with Dev Express controls in a .NET web application
• Familiarity with Crystal Reports for report modification embedded in .NET applications
• Experience with ESRI ArcGIS SDK/API integration within .NET web applications
  
  Missouri residency or St. Louis metro area location

• Full Benefits Package
• 10 Days PTO
• 10 Paid Holidays
• 401K