Full Stack C# Developer

Full Stack C Developer - Trading Systems
Location: New York, NY (Hybrid - Onsite required)
Employment Type: Full-Time Direct Hire
Compensation: $150,000 - $175,000 base + bonus
Industry: Financial Technology Trading Systems
Sponsorship: H-1B transfer, TN, H-4 EAD accepted (must have 2+ years left on visa or I-140 approved)
Interview Process: HackerRank test + onsite interviews required About the Opportunity
Argo Recruiting is working with a premier financial services firm in New York City that is seeking two highly skilled Full Stack C Developers to help build and scale next-generation trading systems. This is a rare opportunity to join a high-performance team developing real-time, multi-threaded trading platforms for a top-tier institution. Ideal candidates will have deep C .NET experience, a passion for finance or trading systems, and strong fundamentals in multithreaded architecture and enterprise application performance. Key Responsibilities Design and develop high-performance trading applications using C .NET (Core + Framework)
Contribute to both server-side logic and GUI interface components
Apply Agile development methodologies in a highly collaborative environment
Use memory and performance profiling tools to fine-tune system performance
Deliver clean, scalable code using object-oriented principles and modern best practices
Support enterprise production environments, diagnose issues, and enhance reliability
Participate in full SDLC, including unit testing and deployment
Collaborate with cross-functional teams on new features and system architecture Required Qualifications 3+ years of hands-on development with C .NET, including multi-threaded application design
Expertise in .NET Core and associated libraries
Experience with performance tuning and memory profiling in enterprise systems
Solid understanding of object-oriented programming and software design patterns
Bachelor's degree in Computer Science, Engineering, or related technical field
Excellent verbal and written communication skills
Ability to work onsite in New York and complete HackerRank technical test Preferred Qualifications Experience developing trading systems or financial applications
Exposure to other object-oriented languages like Java or C
Strong academic background and/or demonstrable interest in finance (e.g., internships, coursework, personal projects) What's Offered Competitive salary ($150K-$175K) + annual bonus
Full health, dental, vision, and 401(k) package
Opportunities for Green Card sponsorship (H-1B transfer or I-140 approved candidates welcome)
Dynamic, fast-paced work environment with cutting-edge technologies
Career advancement in one of the world's most competitive financial tech firms Ready to apply?
If you're a high-performing engineer ready to make an impact in financial technology, we want to hear from you. Learn more about us at and submit your resume today to take the next step in your career.