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Senior Backend Software Engineer (C#)
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Selby Jennings
New York, NY (In Person)
Full-Time
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Job Description
Overview Our client (Tier 1 Fund) is seeking a strong backend software engineer to join its Accounting Technology team, focused on building and maintaining high-performance financial systems that support critical post-trade and data processing workflows. This role is best suited to a hands-on engineer who thrives in a fast-paced environment, enjoys solving complex technical problems, and is comfortable working on high-volume, distributed systems in a production trading environment. Key Responsibilities Design, develop, and maintain scalable backend services supporting their core financial systems Build and enhance distributed, event-driven architectures to process high-volume transactional data Develop microservices and APIs that handle trade, position, and financial data workflows Work on systems responsible for data processing, reconciliation, and financial event handling Collaborate closely with engineering teams globally to deliver robust, production-ready solutions Contribute to both new development and enhancement of existing systems, balancing performance, reliability, and scalability Participate in a fast-moving environment, supporting critical systems while driving forward improvements Core Requirements 5-10+ years of hands-on backend development experience Strong proficiency in C# / .NET Core Experience building microservices and distributed systems Strong understanding of:multi-threading / concurrency , API development & system performance optimisation Experience working with event-driven architectures Hands-on experience with messaging technologies such as: Kafka, Solace, RabbitMQ, ActiveMQ, or similar Experience working on high-volume, real-time, or batch processing systems Background in financial services environments (hedge funds, banks, asset managers, trading platforms)