Senior Software Engineer: AI-Powered .NET Modernization

Color Employer, LLC; Pennsylvania; Hybrid; USD 125,241 - 187,862; Full time

Job summary

Lyric is seeking an experienced software engineer to modernize a legacy .NET + SQL Server stack and deliver reliable software in a fast-moving, cross-functional team. You will leverage AI coding tools daily to perform multi-file refactors, migrations, and test generation, ensuring security, observability, and robust CI guardrails.

The role emphasizes independent and collaborative work in a dynamic environment with strong emphasis on scalable architecture and concrete, testable outcomes.

Qualifications

• 5+ years building and shipping production systems in real user environments.
• Strong C# and modern .NET (Core and beyond) experience in large codebases with refactor and migration work.
• Expertise in SQL Server: schema design, query performance tuning, and transactional correctness.
• Experience with Azure and/or AWS; Azure is especially relevant.
• API design and versioned service-oriented architecture experience, including auth, reliability, and testing.
• Daily use of AI coding tools such as Cursor, Claude Code, Codex, or similar for multi-file refactors, migrations, test generation, and review workflows.

Responsibilities

• Use AI agents to accelerate framework upgrades, refactors, API extractions, test scaffolding, and documentation while preventing regressions.
• Build reusable playbooks, prompt templates, and migration checklists for AI-assisted work.
• Modernize a legacy .NET + SQL Server stack to contemporary, maintainable, and scalable technology.
• Ensure security, privacy, and observability in all code, setting strong automated tests and CI guardrails.
• Collaborate with analysts, stakeholders, and engineers to translate business problems into reliable software.

Skills

C# / .NET

SQL Server

Azure / AWS

API design

AI coding tools

Team collaboration

Tools

Cursor

Claude Code

Codex

Job description

Lyric is seeking an experienced software engineer to modernize a legacy .NET + SQL Server stack and deliver reliable software in a fast-moving, cross-functional team. You will leverage AI coding tools daily to perform multi-file refactors, migrations, and test generation, ensuring security, observability, and robust CI guardrails.

The role emphasizes independent and collaborative work in a dynamic environment with strong emphasis on scalable architecture and concrete, testable outcomes.