Senior Software Architect - Remote & Modernization

One Call; Jefferson City (MO); Remote; USD 120,000 - 150,000; Full time

Benefits offered by this job

Remote work

Generous time off

Comprehensive benefits

401(k) matching

Life insurance

Short/long-term disability

Colleague Assistance Program

One Call Foundation

Job summary

One Call is seeking an experienced Senior/Principal Software Engineer to provide architectural depth and hands-on leadership in a complex, legacy-heavy environment actively modernizing. This remote-first role centers on technical decision-making, guiding engineers, and delivering high-quality software across .NET, SQL Server, WinForms/Web Forms, and modern .NET Core, REST APIs, and front-end stacks.

You will oversee architecture across multiple apps, unblock teams, mentor peers, and champion

Qualifications

• 10+ years building enterprise .NET applications in C# (.NET Framework + .NET Core).
• Experience modernizing large legacy .NET codebases (service extraction, modularization, domain consolidation).
• Familiarity with Azure cloud services, logging, monitoring, and observability patterns.
• Experience in healthcare, workers' compensation, claims processing, or regulated industries.
• Experience with distributed queues, messaging patterns, event-driven architecture.

Responsibilities

• Own and drive architecture and design discussions across multiple applications and services.
• Provide pragmatic, hands-on guidance to teams working across .NET, SQL, and mixed front-end stacks.
• Evaluate legacy architectures and propose modernization patterns (service boundaries, APIs, refactors, consolidation).
• Facilitate technical decision-making with crisp rationales, tradeoff analysis, and clear documentation.

Skills

Architectural leadership

Hands-on engineering

Cross-functional collaboration

CI/CD practices

Debugging & troubleshooting

Mentorship

Problem solving

AI-assisted coding

Education

10+ years enterprise .NET experience

Bachelor's degree or related field

Tools

Azure DevOps

.NET Framework/.NET Core

C#

VB.NET

SQL Server

ASP.NET MVC

Web API

Web Forms/WinForms

WCF

SSIS/SSRS

Entity Framework

Dapper

JavaScript/TypeScript

jQuery/Knockout/Bootstrap

Bootstrap

PowerShell

Bash

MSBuild/MSDeploy

Jenkins

Job description

One Call is seeking an experienced Senior/Principal Software Engineer to provide architectural depth and hands-on leadership in a complex, legacy-heavy environment actively modernizing. This remote-first role centers on technical decision-making, guiding engineers, and delivering high-quality software across .NET, SQL Server, WinForms/Web Forms, and modern .NET Core, REST APIs, and front-end stacks.

You will oversee architecture across multiple apps, unblock teams, mentor peers, and champion