Lead .Net Developer

Lead .NET Developer — Legacy Modernization | Financial Services (Long Island, NY)

If you've led or been a key part of a team that modernized a legacy .NET platform — and you still write code every day — keep reading.

Our client is a well‑established financial services firm investing in modernizing their technology platform. They're migrating from legacy .NET to modern C#/.NET frameworks and they need a hands‑on technical lead who's been through this before — someone who can help set direction on the migration while building alongside the team.

This is a mission‑critical, zero‑downtime environment. The business runs on these applications around the clock. You'd be modernizing systems while they're in production, which means you understand how to sequence a migration, manage risk, and deliver without disruption. If you've been through that kind of effort before, you know why that matters.

Helping lead the technical approach for migrating legacy  applications to modern C#/.NET, using frameworks such as Angular, Blazor, or similar, while continuing to deliver on business needs in the existing stack. Working deep in SQL Server — stored procedures, query optimization, indexing, schema design across both legacy and greenfield databases. Building modern, responsive front‑end experiences with Bootstrap, Blazor, or comparable tooling.

Integrating REST APIs and third‑party services. Owning quality end‑to‑end — writing real tests, maintaining clean code, and making sure what goes to production stays in production.

You won't be handed a ticket queue. You'll have real influence over how the modernization gets planned and executed. The team is experienced, knows the business, and is ready to move — they need someone who can help point them in the right direction and build alongside them. The company is exploring AI‑assisted development tools like ChatGPT, Claude, and Cursor, and wants people who are using them, not just reading about them.

Financial services on your resume opens doors, and you'd be gaining that experience without the Manhattan commute. If you're currently stuck at a company that's been "planning to modernize" for the last five years — this is the place where it's actually funded and happening.

Strong hands‑on C#/.NET experience.  in your background. Deep SQL Server skills — design, optimization, not just queries. Experience with modern .NET UI frameworks such as Angular, Razor, Blazor, or similar. Familiarity with enterprise .NET UI component libraries such as Telerik, Dev Express, Syncfusion, or similar is a plus. A track record of owning your work from requirements through deployment. Experience in financial services is valuable, but what matters more is that you've worked where uptime is non‑negotiable and the business users care about what you deliver.

If you've led or been part of a team that took a legacy .NET codebase through a modernization effort — that's what moves you to the top of the pile.