Senior .NET Architect: Remote Modernization Lead

One Call; Phoenix (AZ); Remote; USD 120,000 - 190,000; Full time

Benefits offered by this job

Remote work

Time off 18 days

Medical, dental, vision

401(k) matching

Life insurance

Short/long-term disability

Employee 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 undergoing modernization. This role sits at the center of technical decision-making, guiding engineers and delivering high-quality software across mission-critical applications.

You will work with .NET, SQL Server, WinForms/Web Forms and modern .NET Core, REST APIs, Azure DevOps, and JavaScript/TypeScript front-ends, shaping engineering practices

Qualifications

• 10+ years building enterprise .NET applications.
• Experience modernizing large legacy .NET codebases.
• Healthcare/workers' compensation or regulated industries experience.
• Strong front-end fundamentals in JavaScript/TypeScript.

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.
• Champion engineering excellence: code quality, testing, CI/CD maturity, observability, and maintainability.

Skills

Architectural leadership

Hands-on development

.NET expertise

SQL Server

Azure DevOps

UI frameworks

Tools

Azure DevOps

MSBuild

MSDeploy

MSTest

NUnit

XUnit

Jenkins

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 undergoing modernization. This role sits at the center of technical decision-making, guiding engineers and delivering high-quality software across mission-critical applications.

You will work with .NET, SQL Server, WinForms/Web Forms and modern .NET Core, REST APIs, Azure DevOps, and JavaScript/TypeScript front-ends, shaping engineering practices