Senior C# Developer - .NET, MSI Packaging, CI/CD Expert

Loyal Source

Westford (MA)

On-site

USD 94,000 - 131,000

Full time

3 days ago

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Job summary

Loyal Source is seeking a Senior C# Developer to design, build, and maintain scalable, high-performance applications using .NET technologies. You will mentor junior developers and influence architectural decisions while delivering robust solutions with cross-functional teams.

The role emphasizes Windows application development, MSI installer packaging with WiX Toolset and Advanced Installer, and release engineering to ensure reliable installation, upgrade, and deployment processes.

Qualifications

5–6+ years of experience in software development using C#.
“.NET Framework, .NET Core, Windows Services.”
“Installer Technologies: Advanced Installer & WiX Toolset.”
“Experience creating: MSI packages, Bootstrapper applications, Upgrade packages, Patches and hotfix installers & Silent installations.”
“Knowledge of Windows Installer internals and troubleshooting installation issues.”
“Release Engineering: building and managing CI/CD pipelines, GitHub Actions, PowerShell scripting”

Responsibilities

Design, develop, test, and maintain applications using C# and .NET technologies.
Create, maintain, and troubleshoot MSI installers using WiX Toolset and Advanced Installer.
Design upgrade, patching, rollback, and migration strategies for software releases.
Analyze and resolve production issues, and installation-related problems.
Participate in code reviews and mentor junior developers.
Work with QA teams to ensure software quality and release readiness.
Contribute to CI/CD pipelines and release management processes.