Senior .NET Developer

WHO WE ARE

Our mission is simple: better volunteerism, stronger communities. Better Impact provides software that helps nonprofits, government agencies, healthcare organizations, and companies recruit, schedule, communicate with, and track volunteers and their impact.

We advance volunteerism by equipping the professionals who make it happen with the technology, benchmarks, and community they need to run effective volunteer programs.

Today, our products support more than 85,000 organizations, millions of volunteers, and over 600 million volunteer hours across the nonprofit, public, healthcare, and corporate sectors. Our vision is a world where volunteerism is recognized, resourced, and respected in every community.

We are a growing, private-equity-backed business focused on meaningful work

We believe technology should strengthen communities and support the professionals who lead their programs. Our team is committed to building meaningful tools while fostering a workplace where people feel supported, valued, and empowered to grow.

We take the work seriously. We don’t take ourselves too seriously.

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  and .NET Framework. It works. It serves thousands of organizations. And it needs to move to .NET 10 and C# so we can hire, ship, and build on a modern stack.

You’ve done this before. You’ve been the technical anchor on a .NET  migration of a real production monolith where downtime had to be tightly managed. You know how to migrate incrementally without breaking a live system, and your opinions come from experience, not theory. You’ve lived in NHibernate, swapped out legacy DI containers and dead dependencies, and dealt with custom security frameworks that predate ASP.NET

Core’s policy model.

You’re still hands‑on. You write code daily, configure your own CI pipelines, and can replace a legacy dependency, validate the regression risk, and ship the change to production. You want a role where you own the company’s most important technical initiative, not one where you draw architecture diagrams and hand them off.

You do serious work with a small core team, supported by fractional Dev Ops and release expertise when it matters, and a dedicated quality engineering function that owns the regression gate protecting this migration. You own the technical path, make sound trade-offs, and work directly with those partners to move the platform forward. You’re here to build the engineering foundation, not inherit one.

• Lead the migration of the Volunteer Impact backend from  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#…