Senior .NET Developer

Required Candidate Location: Hybrid/NYC 3 Days a Week - NO RELOCATION

Job Description:

RESPONSIBILITIES
We are seeking a Senior .NET Developer with strong experience building enterprise applications in a Capital Markets and Trading environment . The ideal candidate will have hands-on expertise with C#, .NET/.NET Core, Angular and/or React , along with a solid understanding of trading workflows, financial products, and front-office technology. This role will work closely with traders, quantitative analysts, business analysts, and technology teams to develop high-performance applications supporting trading, pricing, risk, and market-data functions.

Key Responsibilities

• Design, develop, and maintain high-performance applications using C#, .NET, .NET Core, and ASP.NET Core .
• Build modern, responsive front-end applications using Angular and/or React .
• Develop RESTful APIs, microservices, and distributed applications supporting trading and capital markets platforms.
• Collaborate directly with traders, portfolio managers, quantitative developers, and business stakeholders to translate trading requirements into scalable technology solutions.
• Develop applications supporting trade capture, order management, execution, pricing, positions, P&L, risk, and market data .
• Integrate applications with internal trading systems, market-data platforms, messaging systems, and third-party financial services.
• Work with real-time and high-volume data while maintaining application performance, reliability, and scalability.
• Develop reusable UI components, services, APIs, and libraries using modern software engineering practices.
• Participate in architecture, technical design, code reviews, testing, deployment, and production support.
• Troubleshoot complex application, integration, performance, and production issues.
• Work within an Agile/Scrum development environment and participate in sprint planning, stand-ups, retrospectives, and technical discussions.
• Partner with DevOps teams to support CI/CD pipelines, automated testing, and cloud or on-premises deployments.

Required Qualifications

• 12+ years of professional software development experience with C# and .NET .
• Strong experience with .NET Core / ASP.NET Core and object-oriented programming.
• Hands-on experience with Angular or React and modern JavaScript/TypeScript development.
• Strong experience developing REST APIs, microservices, and distributed applications .
• Experience with SQL Server and relational database development, including complex queries and performance optimization.
• Strong understanding of software design patterns, SOLID principles, data structures, and application architecture.
• Experience with Git and modern source-control practices.
• Experience working in an Agile/Scrum development environment.
• Strong communication skills with the ability to work directly with business and trading stakeholders.

Capital Markets Experience

• Proven experience developing applications within Capital Markets, Investment Banking, Trading, Brokerage, or Financial Services environments.
• Strong understanding of one or more areas such as Equities, Fixed Income, FX, Derivatives, Rates, Commodities, or Securities Trading .
• Understanding of trading lifecycle concepts including orders, executions, allocations, positions, confirmations, settlements, and P&L .
• Experience working with market data, pricing, trade processing, risk, or order management systems .
• Familiarity with electronic trading, OMS/EMS platforms, FIX protocol, or exchange connectivity is highly desirable.
• Ability to understand complex financial requirements and translate them into technical solutions.

Preferred Qualifications

• Experience with FIX Protocol and financial messaging.
• Experience with Kafka, RabbitMQ, or other messaging technologies .
• Experience with Azure or AWS cloud platforms.
• Experience with Docker, Kubernetes, or containerized applications.
• Knowledge of Redis, NoSQL databases, or distributed caching .
• Experience with automated testing frameworks such as xUnit, NUnit, Jest, or Cypress .
• Experience with CI/CD tools such as Azure DevOps, GitHub Actions, Jenkins, or GitLab CI .
• Experience with performance tuning, concurrency, multithreading, and low-latency application development.
• Exposure to Bloomberg, Refinitiv/LSEG, ICE, CME, or other market-data/exchange technologies is a plus.

Ideal Candidate

The ideal candidate is a hands-on senior engineer who combines strong .NET development skills with modern Angular or React front-end expertise and genuine Capital Markets trading experience . The candidate should be comfortable operating in a fast-paced front-office technology environment, communicating with traders and business stakeholders, and developing reliable, scalable applications that process financial and market data in real time.