Senior Backend Software Engineer; C#

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.

• 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

• 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, Rabbit
  
  MQ, Active
  
  MQ, or similar
• Experience working on high-volume, real-time, or batch processing systems
• Background in financial services environments ideal but not required (hedge funds, banks, asset managers, trading platforms)