Senior C# Developer - Financial Services

Overview Senior C# Developer – Financial Services role with an exclusive buy-side client in Midtown Manhattan. Onsite, full-time. You will write clean, scalable, high-performance code that directly impacts trading and portfolio decisions. This isn’t an architect or management role — we’re looking for a passionate developer who wants to contribute at the code level. Why You’ll Love This Role Work on cutting-edge enterprise frameworks that power mission-critical systems. Direct exposure to traders, portfolio managers, and senior technologists. Solve real-time performance challenges in a fast-paced financial environment. Collaborate in a small, elite team where your impact is visible daily. What You’ll Do Design and build scalable frameworks in C#/.NET Core. Apply SOLID principles, clean code, and object-oriented design best practices. Develop APIs, middleware, and low-latency services used across trading desks. Collaborate closely with quants, portfolio managers, and senior engineers. Own the full development lifecycle — from architecture decisions to deployment. What We’re Looking For 7+ years of hands-on experience developing in C# and .NET Core. Proven success building high-performance, scalable enterprise systems. Strong focus on frameworks, clean code, OOD, and multithreading. Experience in financial services or complex, data-driven environments is a plus. Familiarity with Angular, SQL Server, and CI/CD pipelines is helpful but not required. Must be authorized to work for any U.S. employer (no sponsorship). Based in NYC or willing to commute onsite (4 days/week). Why Join Us You’ll be embedded with one of the world’s most respected buy-side firms, solving real financial engineering problems with an elite team of developers. We offer a collaborative, fast-paced environment where innovation drives everything we do. Employment type Full-time Seniority level Mid-Senior level Job function Engineering and Information Technology #J-18808-Ljbffr Prospect 33