Remote Principal Software Architect - .NET Modernization

One Call; Dover (DE); Remote; USD 120,000 - 190,000; Full time

Benefits offered by this job

Remote work

PTO 18 days + 8 holidays

Medical insurance

Dental insurance

Vision insurance

401(k) matching

Life insurance

Disability (short/long-term)

Colleague Assistance Program

Job summary

One Call is seeking a Senior/Principal Software Engineer to provide architectural depth and hands-on leadership in a legacy-heavy environment actively modernizing. This role is technically focused, not people-management, and will guide engineers across .NET, SQL Server, and front-end stacks.

You'll influence architecture, enforce engineering best practices, and contribute high-quality code across multiple mission-critical applications, including REST APIs and Azure DevOps pipelines.

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 with healthcare, workers' compensation, claims processing, or regulated industries

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.

Job description

One Call is seeking a Senior/Principal Software Engineer to provide architectural depth and hands-on leadership in a legacy-heavy environment actively modernizing. This role is technically focused, not people-management, and will guide engineers across .NET, SQL Server, and front-end stacks.

You'll influence architecture, enforce engineering best practices, and contribute high-quality code across multiple mission-critical applications, including REST APIs and Azure DevOps pipelines.