[Hiring] Senior .NET Developer @Better Impact

Role Description

We are looking for a senior C#/.NET engineer who modernizes the platform, not just maintains it. Our flagship product, Volunteer Impact, is a mature, revenue-generating platform built on VB.NET and .NET Framework. It needs to move to .NET 10 and C# to enable further development.

• Lead the migration of the Volunteer Impact backend from VB.NET/.NET Framework to C#/.NET 10, defining the migration approach and executing it incrementally against a live production system.
• Modernize a custom security framework (70+ custom attributes) into something that works on the new stack, with zero authorization bypasses.
• Strengthen the existing CI/CD pipeline and, with our quality engineering function, wire in the gates that catch functional and performance regressions before they reach production.
• Ship migrated areas to production independently and incrementally while the legacy application keeps running.
• Become the second engineer who can independently cut, validate, and deploy a production release.
• Identify, evaluate, and replace legacy dependencies that don’t have a path forward to modern .NET, without introducing functional or performance regressions.
• Make the technical sequencing calls: which areas migrate first, which dependencies get replaced when, and where automated conversion is viable vs. manual rewrite.
• Lay the foundation for the team to grow by modernizing the stack to one that any C# developer can contribute to.

Qualifications

• 8+ years of professional C#/.NET experience, with real depth in the framework, not just the latest version.
• Experience leading or being the technical anchor on a .NET Framework-to-.NET Core (or later) migration of a large, production monolith serving paying customers.
• Ability to articulate the approach for migrating a production system incrementally with minimal downtime.
• Deep NHibernate experience is strongly preferred.
• Experience replacing legacy dependencies in production: DI containers, bundling frameworks, service hosting, and unsupported third-party libraries.
• Hands-on experience with legacy .NET ecosystem components: ASP.NET MVC-to-Core routing, custom security frameworks, and dependencies without a clean upgrade path.
• Familiarity with migrating SSRS reports to a modern reporting platform is a benefit.
• Experience improving CI/CD pipelines for .NET applications and working with quality functions to build gates that catch functional and performance regressions early.
• Comfortable in a small core team with shared DevOps and DBA support available, and a dedicated quality engineering partner.
• VB.NET familiarity is a bonus, not a requirement.

Requirements

• Strong technical decision-making skills.
• Ability to debug hands-on and know when to pull in the right support.

Benefits

• Medical, dental & vision insurance (after 90 days).
• 401(k) (after 90 days).
• Unlimited vacation + 9 paid holidays.
• Paid parental leave.
• Competitive compensation package.