C++ Developer

2 weeks ago

London, United Kingdom EC1 Partners Full time

Job DescriptionSenior C++ Developer – Low-Latency SystemsLocation: London, UKReports to: Chief Technology Officer (CTO)Company: [Confidential – Global FinTech / Trading Technology Firm]About the Company Our client is a leading provider of advanced technology, liquidity, and execution services within global financial markets. The firm delivers high-performance, low-latency trading infrastructure to institutional clients worldwide, combining deep market expertise with innovative engineering.The Role We are seeking an experienced Senior C++ Developer to join the core engineering team, responsible for designing, developing, and optimising high-performance trading and pricing systems. Reporting directly to the CTO, you will play a key role in defining the architecture, performance, and reliability of the firm’s next-generation low-latency trading platform.You will collaborate closely with senior developers, architects, and business stakeholders to ensure systems operate at microsecond-level performance with exceptional scalability and stability in demanding market conditions.Key ResponsibilitiesDesign, develop, and maintain high-performance C++ applications for real-time market data processing, pricing, and trade execution.Optimise existing codebases for latency, throughput, and reliability.Contribute to the architecture and design of new low-latency components and APIs.Collaborate with senior engineering leadership on technical strategy and system design.Profile, benchmark, and tune systems across network, kernel, and hardware layers.Integrate with liquidity providers, ECNs, and internal risk/pricing systems.Implement automated testing, monitoring, and deployment pipelines to support production stability.Key Skills & Experience7+ years’ professional experience in C++ (C++17/20 preferred) within low-latency, real-time, or high-frequency environments.Strong knowledge of multithreading, concurrency, memory management, and lock-free data structures.Proven experience optimising network I/O, kernel bypass, and performance tuning (e.g. DPDK, RDMA, kernel tuning).Solid understanding of Linux systems programming and profiling tools (perf, gdb, valgrind, etc.).Background in FX, equities, or digital asset trading systems is highly advantageous.Excellent communication skills and a collaborative, pragmatic engineering approach.Desirable ExperienceExposure to Python or Rust for tooling and integration.Knowledge of market data protocols (FIX, FAST, binary feeds).Experience with distributed systems or co-located trading environments.Why JoinDirect influence on the technical direction of a global trading platform.Close collaboration with highly experienced engineering leadership.Opportunity to build systems that operate at the cutting edge of performance.Competitive compensation and strong career development potential.

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