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Selby Jennings Linkedin · Posted 8d ago

Senior C++ Engineer

Ireland

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Indexed description

A leading quantitative trading and technology firm is seeking a Senior Low Latency C++ Software Engineer to join a highly collaborative engineering team focused on building next-generation electronic trading systems.

This is an opportunity to work on business-critical technology where performance, reliability, and scalability are fundamental. You'll be surrounded by exceptionally strong engineers, researchers, and quantitative specialists, solving complex technical challenges in a fast-paced environment where your work has direct impact.

The Role

As a Senior Software Engineer, you will be responsible for designing, developing, and optimising high-performance systems that power automated trading and research platforms. You'll work across a broad range of technical problems, from low-level performance optimisation and networking through to distributed systems and large-scale infrastructure.

Key responsibilities include:

  • Designing and developing ultra-low latency C++ applications
  • Building and enhancing automated trading and market data systems
  • Optimising system performance across the software stack
  • Developing scalable, fault-tolerant infrastructure and services
  • Working closely with researchers and other engineers to deliver new functionality
  • Improving tooling, monitoring, testing, and operational reliability
  • Contributing to the architecture of distributed systems handling large volumes of real-time data
  • Participating in code reviews and helping maintain high engineering standards

What We're Looking For

  • Strong commercial experience developing software in modern C++
  • Excellent understanding of data structures, algorithms, concurrency, and systems programming
  • Experience building high-performance, low latency, or distributed systems
  • Strong Linux knowledge and familiarity with networking concepts
  • Passion for solving difficult technical problems
  • Excellent software engineering fundamentals and clean coding practices
  • Experience with multithreading, performance profiling, and optimisation
  • Bachelor's, Master's, or PhD in Computer Science, Engineering, Mathematics, Physics, or a related technical discipline

Nice to Have

  • Experience within trading, fintech, HFT, market making, or quantitative finance
  • Knowledge of market data, exchange connectivity, or trading infrastructure
  • Familiarity with performance-sensitive network programming
  • Experience working with large-scale distributed systems

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