Senior Software Architect & Technical Lead — Remote

One Call; Springfield (IL); Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Remote work

Generous time off

Comprehensive benefits

Colleague assistance program

Job summary

One Call is seeking a Senior/Principal Software Engineer to provide architectural depth and hands-on leadership in a complex, legacy-heavy environment actively modernizing. You will guide engineers across .NET, SQL Server, WinForms/Web Forms, and modern .NET Core, REST APIs, and front-end stacks while driving quality and delivery.

You will mentor teammates, promote CI/CD maturity, implement robust testing, and help architect scalable solutions in a remote-first setup, with a strong emphasis on

Qualifications

• 10+ years building enterprise .NET applications in C# (.NET Framework + .NET Core).
• Experience modernizing large legacy .NET codebases.
• Familiarity with Azure cloud services, logging, monitoring and observability.
• 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.
• Facilitate technical decision-making with clear rationales and tradeoff analysis.
• Elevate engineering practices through code reviews, pairing, and mentoring.
• Build and maintain Azure DevOps pipelines and automate testing.

Skills

C#

VB.NET

ASP.NET

SQL Server

JavaScript

TypeScript

Azure DevOps

CI/CD

PowerShell

REST APIs

Tools

Azure DevOps Pipelines

MSTest

NUnit

XUnit

Moq

SQL Server

Visual Studio

Job description

One Call is seeking a Senior/Principal Software Engineer to provide architectural depth and hands-on leadership in a complex, legacy-heavy environment actively modernizing. You will guide engineers across .NET, SQL Server, WinForms/Web Forms, and modern .NET Core, REST APIs, and front-end stacks while driving quality and delivery.

You will mentor teammates, promote CI/CD maturity, implement robust testing, and help architect scalable solutions in a remote-first setup, with a strong emphasis on